Day: April 6, 2022

Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: Tri(naphthalen-1-yl)phosphine, is researched, Molecular C30H21P, CAS is 3411-48-1, about Complexes of gold(I) and platinum(II) with polyaromatic phosphine ligands.Synthetic Route of C30H21P.

Au and Pt(II) complexes of the phosphine ligands PArnPh3-n (Ar = naphthyl, anthracenyl, ferrocenyl and other polyaromatic groups) were synthesized. The electron donating abilities of naphthyl and anthracenyl phosphine ligands was explored using gas phase photoelectron spectral data on the parent phosphines and their relative complexing ability to Pt precursor mols. was assessed by synthetic studies and NMR experiments Their steric parameters were estimated by the Tolman cone angle methodol. using x-ray crystallog. data. The mol. structures of the Au complexes [AuCl(PAn2Ph)]·CHCl3 and [Au(PFc2Ph)2]·CHCl3 were determined

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Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Article, Chemical Communications (Cambridge, United Kingdom) called An arene-stabilized η5-pentamethylcyclopentadienyl antimony dication acts as a source of Sb+ or Sb3+ cations, Author is Zhou, Jiliang; Kim, Hyehwang; Liu, Liu Leo; Cao, Levy L.; Stephan, Douglas W., which mentions a compound: 1663-45-2, SMILESS is P(CCP(C1=CC=CC=C1)C2=CC=CC=C2)(C3=CC=CC=C3)C4=CC=CC=C4, Molecular C26H24P2, Reference of 1,2-Bis(diphenylphosphino)ethane.

Double chloride abstraction from Cp*SbCl2 (Cp* = pentamethylcyclopentadienyl) affords an arene-stabilized η5-Cp*-bound antimony dicationic compound [(η5-Cp*)Sb(tol)][B(C6F5)4]2 (1) (tol = toluene), which exhibits strong Lewis acidity, abstracting chloride from Ph3CCl. 1 Reacts with different Lewis bases via divergent pathways, giving rise to release of either Sb+ or Sb3+ cations.

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Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

Al-Jibori, Subhi A.; Al-Doori, Luma A.; Al-Janabi, Ahmed S. M.; Alheety, Mustafa A.; Wagner, Christoph; Karadag, Ahmet published the article 《Mercury(II) mixed ligand complexes of phosphines or amines with 2-cyanoamino thiophenolate ligands formed via monodeprotonation and carbon-sulfur bond cleavage of 2-aminobenzothiazole. X-ray crystal structures of [Hg(SC6H4NCN)(PPh3)]2 and [Hg(SC6H4NCN)(Ph2PCH2PPh2)]2》. Keywords: mercury phosphine amine cyanoaminothiophenolate complex preparation crystal structure.They researched the compound: 1,2-Bis(diphenylphosphino)ethane( cas:1663-45-2 ).Formula: C26H24P2. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:1663-45-2) here.

The addition of sodium hydroxide to a mixture of Ph mercury acetate and 2-aminobenzothiazole in warm ethanol led to the high yield (84%) formation of [Ph-Hg(LH)]n (1), LH = the 2-cyanoaminothiaphenolate anion (SC6H4NHC[n.58118]N)-, resulting from monodeprotonation of 2-aminobenzothiazole and facile carbon-sulfur bond breakage. Reaction of 1 with Ph3P or Ph3PS afforded [Hg(LH)2(Ph3P)2] (2) or [PhHg(μ-LH)(Ph3PS)]2 (3), resp. Recrystallization of 2 from warm DMSO afforded [Hg(μ-L)(PPh3)]2 (4), L = the 2-cyanoaminothiophenolate di-anion (SC6H4NC[n.58118]N)2-, which was characterized by an x-ray diffraction study. Treatment of 1 with the diphosphines Ph2P(CH2)nPPh2, 2,6-diaminopyridine (dapy), ethylenediamine (en) or 1,10-phenanthroline (phen) afforded [PhHg(LH){ Ph2P(CH2)nPPh2}], {n = 1 dppm (5), n = 2 dppe (6), n = 3 dppp (7), n = 4 dppb (8), (CH2)n = (Cp)2Fe dppf (9)}, [PhHg(LH)(dapy)2] (11), [PhHg(LH)(en)] (12) or [PhHg(LH)(phen)] (13). Recrystallization of 5 from CH2Cl2 afforded binuclear [Hg(μ-L)(η1-dppm)]2.CH2Cl2 (10), which was characterized by an x-ray diffraction study.

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Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Zeitschrift fuer Anorganische und Allgemeine Chemie called Direct Synthesis and Characterization of New Copper(II) and Zinc(II) 5-R-Tetrazolato Complexes [R = Me, Ph, 4-Py] with Ethylenediamine and DMSO as Coligands, Author is Mosalkova, Anastasiya P.; Voitekhovich, Sergei V.; Lyakhov, Alexander S.; Ivashkevich, Ludmila S.; Gaponik, Pavel N.; Ivashkevich, Oleg A., which mentions a compound: 14389-12-9, SMILESS is C1(C2=NN=NN2)=CC=NC=C1, Molecular C6H5N5, Application In Synthesis of 5-(4-Pyridyl)-1H-tetrazole.

Three novel 5-R-tetrazolato complexes (R = Me, Ph, 4-Py), [Zn2(MeCN4)4(DMSO)2]n (1), [Cu2(PhCN4)4(en)2]·2DMSO (2), and {[Cu(4-PyCN4)2(DMSO)2]·4DMSO}n (3), were isolated as unexpected products under attempts to prepare heterometallic tetrazolates using a direct synthesis strategy in the Cu0-ZnO-en-RCN4H-DMSO system (en = ethylenediamine). The prepared compounds were characterized by elemental, single-crystal x-ray, and thermal analyses, and IR spectroscopy. Variation of the 5-substituent of the tetrazole ring causes different composition of complexes 1-3 and diverse coordination modes of 5-R-tetrazolato ligands. Complex 1 is a 3-dimensional coordination polymer due to N1,N4-bridging of 5-methyltetrazolato anions. Complex 2, with en as a coligand, has a dinuclear structure with two copper atoms linked together by two 5-phenyltetrazolato ligands by tetrazole N2,N3 bridges. Complex 3 represents a 2-dimensional coordination polymer, formed due to 5-(4-pyridyl)tetrazolato bridges between adjacent copper atoms (with the tetrazole and pyridine rings nitrogen atoms as coordination centers). DMSO mols., included in all the compounds, are solvate and/or coordinated ones.

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Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: 1,2-Bis(diphenylphosphino)ethane, is researched, Molecular C26H24P2, CAS is 1663-45-2, about Synthesis and characterisation of a range of Fe, Co, Ru and Rh triphos complexes and investigations into the catalytic hydrogenation of levulinic acid, the main research direction is hydrogenation catalyst ruthenium rhodium triphos complex; crystal structure iron cobalt ruthenium rhodium triphos complex; mol structure iron cobalt ruthenium rhodium triphos complex; triphos ligand preparation reaction iron cobalt ruthenium rhodium halide.Product Details of 1663-45-2.

The coordination chem. of the N-triphos ligand (NPPh3, 1b) was studied with a range of Fe, Co and Rh precursors and found to form either tridentate or bidentate complexes. Reaction of NPPh3 with [Rh(COD)(MeCN)2]BF4 gave the tridentate complex [Rh(COD)(κ3-NPPh3)]BF4 (3) in the solid state, however, in solution a bidentate complex predominates in more polar solvents. Reaction of NPPh3 with Fe carbonyl precursors revealed the formation of the bidentate complexes [Fe(CO)3(κ1,κ2-NPPh3)Fe(CO)4] (4) and [Fe(CO)3(κ2-NPPh3)] (5), while reaction with FeBr2 resulted in the paramagnetic bidentate complex [Fe(Br)2(κ2-NPPh3)] (6). Reaction of NPPh3 with CoCl2 gave a dimeric Co species [(κ2-NPPh3)CoCl(κ1,κ2-NPPh3)CoCl3] (7), while Zn powder reduction of NPPh3 Co halides gave the tridentate complexes of the type: [Co(X)(κ3-NPPh3)]. The related triphos Ru complex, [Ru(CO3)(CO)(κ3-CPPh3)] (2), also was isolated and characterized. Preliminary catalytic hydrogenation of levulinic acid (LA) was conducted with 2 and 3. The Ru complex is catalytically active, giving high conversions of LA to form gamma-valerolactone (GVL) and 1,4-pentanediol (1,4-PDO), while 3 is catalytically inactive. In situ catalytic testing with 1b and Fe(BF4)2.6H2O resulted in low conversions of LA while a combination of 1b and Co(BF4)2.6H2O gave high conversions to GVL.

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Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Synthesis of phosphoörganic aromatic compounds with lithium reagents》. Authors are Mikhailov, B. M.; Kucherova, N. F..The article about the compound:Tri(naphthalen-1-yl)phosphinecas:3411-48-1,SMILESS:C1=CC2=C(C=C1)C(=CC=C2)P(C1=CC=CC2=C1C=CC=C2)C1=CC=CC2=C1C=CC=C2).Product Details of 3411-48-1. Through the article, more information about this compound (cas:3411-48-1) is conveyed.

Anthracene does not react with PCl3 in the presence of AlCl3, while PCl5 leads only to Cl derivatives Aryl Li derivatives with P halides in Et2O readily gave P derivatives Thus 3 PhLi and PCl3 gave 61% Ph3P; 1-C10H7Li gave 27% (1-C10H7)3P, m. 278-80°, while 9-phenanthryllithium gave 72% tri-9-phenanthrylphosphine, m. 374-6° (from MePh); 9-anthryllithium gave 20% tri-9-anthrylphosphine, orange-red, m. 270-3°, while 9-bromo-10-anthryllithium gave yellow tris(9-bromo-10-anthryl)phosphine, m. 206-8° (from MePh). Similarly, the Li derivative from 10-bromo-1,2-benzanthracene gave 54.6% tris-(1,2-benzanthr-10-yl)phosphine, yellow, m. 192-4°. POCl3 in Et2O similarly gave 65% Ph3PO, 38% (1-C10H7)3PO, 49% tri-9-phenanthrylphosphine oxide, m. 354-6°, 65% tris-(1,2-benzanthr-10-yl)phosphine oxide, m. 191-3° (from Et2O-benzene); alteration of the proportions of the reagents failed to yield products other than R3PO. Use of C5H10NPOCl2, followed by hydrolysis, gave 64% Ph2PO2H, m. 192-4°, 51% (1-C10H7)2PO2H, m. 198-200°; 9-phenanthryllithium (2 moles/mole chloride) gave 2 acids, 9-phenanthrenephosphonic acid, m. 228-9°, and di-9-phenanthrylphosphinic, acid, giving insoluble Na salt, in 33% and 47% yield, resp.

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Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Inorganica Chimica Acta called Three-dimensional bimetallic oxides constructed from molybdophosphonate chains and secondary-metal/4-pyridyltetrazole components, Author is Jones, Stephanie; Darling, Kari; Zubieta, Jon, which mentions a compound: 14389-12-9, SMILESS is C1(C2=NN=NN2)=CC=NC=C1, Molecular C6H5N5, Quality Control of 5-(4-Pyridyl)-1H-tetrazole.

The hydrothermal reactions of molybdenum(VI) oxide, 1,2-ethylenediphosphonic acid, 4-pyridyltetrazole (4-Hpt) and the appropriate metal acetate yielded three-dimensional bimetallic oxides [Mx(4-Hpt)y(H2O)z{Mo5O15(O3PCH2CH2PO3)}]·nhydrate (M = Co or Ni, x = 2, y = 2, z = 6; M = Cu, x = 4, y = 3, z = 1). The Co(II) and Ni(II) phases are isomorphous with structures constructed from the common {Mo5O15(O3PCH2CH2PO3)}n4n- chains linked through binuclear {M2(4-Hpt)2(H2O)6}4+ subunits to provide the three-dimensional connectivity. The Cu(I) species consists of the molybdophosphonate chains embedded in a framework of Cu(I) tetrahedra linked through the tetrazole N donors of the 4-Hpt ligands.

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Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《2-Aminopyridine-5-sulfonamide and some derivatives》. Authors are Naegeli, C.; Kundig, W.; Brandenburger, H..The article about the compound:2-Chloro-5-pyridinesulfonyl chloridecas:6684-39-5,SMILESS:ClC1=NC=C(C=C1)[S](=O)(=O)Cl).Formula: C5H3Cl2NO2S. Through the article, more information about this compound (cas:6684-39-5) is conveyed.

The pyridine analog, 2-aminopyridine-5-sulfonamide (I), of the chemotherapeutically significant H2NC6H4SO2NH2, and a series of its derivatives substituted at the N atom of the side chain have been prepared from 2-chloropyridine-5-sulfonyl chloride (II) obtained either from 2-aminopyridine-5-sulfonic acid (III) or from N-methyl-2-pyridone-5-sulfonic acid (IV). A solution of 250 g. of 2-aminopyridine in 750 g. of H2SO4.H2O was heated at 200-10° for 5 hrs. with 0.5 g. Al powder and the cooled product was poured on ice. The washed precipitate was combined with further fractions from the mother liquor and crystallized from hot H2O, yielding 278 g. (60%) of III; Ac derivative, C7H8N2O4S, m. 300-2° (decomposition), from the Na salt which was converted to the difficultly soluble Cu salt. A suspension of 85 g. of finely powd. III in 600 cc. of 20% HCl at 10° was stirred with 50 g. (1.5 mols.) of NaNO2 in 125 cc. H2O. After 3 hrs. the solution was evaporated to dryness in vacuo, taken up in hot H2O and precipitated with alc., producing 83 g. (97%) of 2-pyridone-5-sulfonic acid (V), converted by chlorination with PCl5 (C. A. 25, 4267) into II. IV (2 g.), obtained by treating N-methyl-2-pyridone with Me2SO4 (Ger. 597,452, C. A. 28, 5083.5), was ground with 4.5 g. PCl5 and refluxed at 130-5° for 5 hrs. with a few drops of POCl3. The cold product was poured over ice and the solid mass was ground with NaHCO3, washed and dried. Extraction with petroleum ether gave 1.7 g. (82%) of II, m. 51°. Gradual addition of 50 g. II in 50 cc. Me2CO to well-stirred cold 20% NH4OH, evaporation and recrystallization from H2O produced 42.7 g. (94%) of iridescent crystals of 2-chloropyridine-5-sulfonamide (VI), C5H5ClN2O2S, m. 158-9°, converted by heating in a bomb-tube for 5 hrs. at 125-60° with 20% NH4OH into 2-aminopyridine-5-sulfonamide (VII), C5H7N3O2S, m. 175.0-6.5°; di-Bz derivative, C19H15N3O4S, m. 221-3°. By heating with the requisite amine under a reflux or, when necessary, in a bomb-tube, VI was converted into 2-ethylamino-, 2-diethylamino-, 2-butylamino-, 2-allylamino-, 2-benzylamino- and 2-phenylaminopyridine-5-sulfonamide, m. 190-1°, 116-17, 121-2°, 195-201°, 199-201° and 181-3°, resp. Heating 5 g. VI with 8 mols. of 33% EtNH2 in a bomb-tube at 135-50° for 4 hrs. yielded 2-ethylaminopyridine-5-sulfonethylamide, C9H15N3O2S, m. 139-41°. Cautious addition of 2.9 g. (2.2 mols.) of PhNH2 to 3 g. VI in 2.5 cc. benzene with cooling, washing the pasty residue with dilute HCl and recrystallization from alc. gave 3 g. (79%) of 2-chloropyridine-5-sulfonanilide, C11H9ClN2O2S, m. 149-51°, converted by heating in a bomb-tube for 2 hrs. at 100-30° with 20% NH4OH to 2-aminopyridine-5-sulfonanilide, m. 176-8°. The addition of 10 g. II in 10 g. anhydrous pyridine to 8.2 g. sulfanilamide in 15 g. pyridine below 40° precipitation with H2O and crystallization from dilute alc. gave 13 g. (79%) of N4-(2′-chloropyridine-5′-sulfonyl)sulfanilamide, C11H10ClN3O4S2, m. 200-2°, transformed by heating with 25% NH4OH in a bomb-tube for 8 hrs. at 130-50° into the corresponding 2′-amino compound, m. 200-2°. Addition of 3.7 g. VII in 6 cc. pyridine to 4 g. II in 4 g. pyridine below 35°, washing the precipitate from H2O with dilute HCl and drying in vacuo yielded 6.5 g. (99%) of orange crystalline 2-(2′-chloropyridine-5′-sulfonyl)aminopyridine-5-sulfonamide, C10H9ClN4O4S2, m. 253-5°, converted by autoclaving in saturated NH4OH for 5 hrs. at 7 atm. at 120-60° into the corresponding 2′-amino derivative, m. 260°. Heating a mixture of 5.5 g. VI and 5 g. morpholine (VIII) in a bomb-tube for 4 hrs. at 120° and crystallization of the product from H2O yielded 5.3 g. (76%) of 2-(N-morpholyl)pyridine-5-sulfonamide, C9H13N3O3S, m. 182-3°. The dropwise addition of 1.5 g. II in 5 cc. Me2CO to a well-stirred solution of 1.23 g. (2 mols.) VIII in 3 cc. H2O gave 1.7 g. (95%) of colorless platelets of 2-chloropyridine-5-sulfonmorpholide, C9H11ClN2O3S, m. 143-4°, converted by refluxing for 5 hrs. with 2 mols. VIII in xylene and recrystallizing the product from alc., in 85% yield, into colorless 2-(N-morpholyl)pyridine-5-sulfonmorpholide. C13H19N3O4S, m. 189-91°. All the above compounds are well tolerated and their action on mice infected with streptococci will be reported elsewhere. The extreme reduction of activity by substitution of the benzene ring in sulfanilamide type compounds “”by heterocyclic rings”” was reported by Tullar at the Dallas meeting of the Am. Chem. Soc. (1938).

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Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Pyridine mercurials》. Authors are Hurd, Charles D.; Morrissey, Clarence J..The article about the compound:2-Chloro-5-pyridinesulfonyl chloridecas:6684-39-5,SMILESS:ClC1=NC=C(C=C1)[S](=O)(=O)Cl).Name: 2-Chloro-5-pyridinesulfonyl chloride. Through the article, more information about this compound (cas:6684-39-5) is conveyed.

The preparation and properties of di-3-pyridylmercury (I), bis(3-pyridylmercuri)ammonium chloride (II), 6-chloro-3-pyridylmercuric chloride (III), and 2-pyridylmercuric chloride (IV) are described. 3-Pyridylmercuric acetate (V) (75 g.) in 3 l. H2O at 80° treated dropwise with 13 g. NaCl in 50 cc. H2O gave 81% 3-pyridylmercuric chloride (VI), m. about 245°; it gave recrystallized from H2O (2 g./1 l.) needles, m. 265-8°. V in hot H2O treated with aqueous NaBr gave 3-pyridylmercuric bromide, m. 275° (decomposition). Similarly was obtained the corresponding iodide, yellow solid, m. 280° (decomposition). Br (10 g.) added during 3.5 h. with stirring to 20 g. VI and 6.6 g. NaBr in H2O at 50-60°, the mixture held 15 h. at 20°, treated with 5.7 g. HCl, and filtered from 16.4 g. residue, the filtrate basified and extracted with Et2O, and the residue (3.0 g.) from the extract redistilled yielded 1.6 g. 3-bromopyridine, b. 168-71.5°. VI (0.2 g.) refluxed 0.5 h. with 25 cc. 0.1N iodine containing 1 g. KI and 3 cc. CHCl3, and the mixture titrated with 0.1N Na2S2O3 indicated a quant. reaction. VI (10 g.), m. 245°, and 100 g. NH4OH stirred occasionally during 0.5 h. and filtered gave 5.1 g. solid filter residue of II, m. 168-80°, which liberated NH3 when boiled with dilute NaOH; the filtrate evaporated and the solid residue (4.8 g.) leached with H2O left unchanged VI, m. 240°. Na2S2O3 (50 g.) in 50 cc. H2O treated with 10 g. V, and the solution allowed to stand 0.5 h. gave 4.5 g. I, white solid, m. 225-6°. II (1 g.) mixed with 10 saturated aqueous Na2S2O3, and the precipitate recrystallized from EtOH gave I, m. 255°, which recrystallized from EtOH gave crystals, m. 239°. I in EtOH mixed with alc. HgCl2 gave VI, m. 240-5°. I in EtOH treated with alc. gave the di-HCl salt, white crystals, m. 222° (decomposition). Similarly was prepared the dipicrate, yellow crystals, m. 255° (decomposition). I.2HCl heated to 200° evolved pyridine. I dipicrate treated with alc. KOH gave I, m. 237-8°. The urethane of 3-aminopyridine (VII) acidified with HCl and heated to 100° until the effervescence ceased, the H2O evaporated, and the residue dissolved in hot C6H6 and precipitated with 2 volumes ligroine gave the amine, m. 62°, in 40% yield. VII (1.88 g.) was diazotized in 6 cc. cold. concentrated HCl with 1.4 g. NaNO2 in 6 cc. H2O and then 5.4 g. HgCl2 in 6 cc. HCl added to yield 6.2 g. diazonium salt-HgCl2 double salt (VIII). VIII (5 g.) mixed with cooling with 5 g. Cu in 30 cc. Me2CO, the mixture treated with 30 cc. NH4OH, allowed to stand 15 h., diluted with an equal volume H2O, and filtered, the filter residue extracted in a Soxhlet apparatus 1 h. with Me2CO, the extract evaporated, and the residue (0.8 g.) crystallized from a little EtOH gave I, m. 232°. VI (10 g.) added to 50 cc. cold NH4OH, the mixture filtered after 0.5 h., the filtrate treated with 10 g. Cu powder, and filtered after several days, the filtrate evaporated to dryness, and the residue recrystallized from EtOH gave a small amount of I, m. 227-34°. 2-Pyridinethiol (22 g.) (from 2-bromopyridine and thiourea), 300 cc. HCl, and 70 cc. ice water treated at 0-5° with excess gaseous Cl, the mixture poured into 800 cc. ice water, and a part of the precipitate recrystallized by dissolving in (CH2Cl)2 at 40° and cooling to -5° gave an unidentified substance, white needles, m. 210° (from Me2CO); the remainder of the solid suspended in 200 cc. cold H2O, mixed with 40 g. Zn dust, heated 20 min. to boiling, made alk. with aqueous Na2CO3, and filtered, the filtrate neutralized, heated with 25 g. HgCl2 to boiling, refluxed 2 h., and filtered, and the filtrate neutralized with HCl yielded IV, white solid, m. 275° (from MeOH). 2-Chloro-5-pyridinesulfonyl chloride (25 g.), m. 51°, treated with vigorous stirring with 23 g. Zn dust, the mixture refluxed 0.5 h., made alk. with Na2CO3 and filtered, the filter residue washed with hot aqueous Na2CO3, the combined filtrates neutralized, treated with 32 g. HgCl2, refluxed 2 h., and filtered, and the filter residue washed with H2O and dried gave 4.5 g. solid, m. 130°, which heated twice with 10% aqueous NaOH at 80°, filtered hot, and washed with H2O yielded 1.5 g. III, m. 263°.

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Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Journal of Molecular Structure called Novel Hg(II) and Pd(II) benzotriazole (Hbta) complexes: Synthesis, characterization, X-ray crystal structure of [Pd(PPh3)(μ-bta)Cl]2. DMSO and thermodynamic study of their H2 storage, Author is Al-Jibori, Subhi A.; Al-Doori, Luma A.; Al-Janabi, Ahmed S. M.; Alheety, Mustafa A.; Akbas, Huseyin; Karadag, Ahmet, which mentions a compound: 1663-45-2, SMILESS is P(CCP(C1=CC=CC=C1)C2=CC=CC=C2)(C3=CC=CC=C3)C4=CC=CC=C4, Molecular C26H24P2, Reference of 1,2-Bis(diphenylphosphino)ethane.

Benzotriazole (Hbta) complexes with Hg(II) and Pd(II) of the types: [Hg(bta)2] (1), [Hg(bta)2(diphos)]; diphos = dppe (2), dppp (3) or dppb (4), [Hg(bta)2(PPh3)2] (5), [Pd(Hbta)2Cl2] (6), [Pd(bta)Cl]2(7) and [PdCl(bta)(PPh3)]2. DMSO (8) were prepared and characterized by elemental analyses, conductivity measurements, IR, 1H- and 31P-{1H} NMR spectra.[Pd(PPh3)(μ-bta)Cl]2. DMSO (8) was structurally characterized by single-crystal x-ray diffraction. Structural information exposed that benzotriazole acts as a bidentate bridging ligand bonded through the deprotonated nitrogen and the neutral nitrogen atoms. The hydrogen storage ability of complexes (1-4) was studied after detecting their BET surface area. 1 Is able to store 3.35% phys. at 77 K under 120 bar.

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Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis