Day: March 29, 2022

The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: 5-(4-Pyridyl)-1H-tetrazole(SMILESS: C1(C2=NN=NN2)=CC=NC=C1,cas:14389-12-9) is researched.Formula: C9H6OS. The article 《Factors Affecting the Conformational Modulation of Flexible Ligands in the Self-Assembly Process of Coordination Polymers: Synthesis, Structural Characterization, Magnetic Properties, and Theoretical Studies of [Co(pda)(bix)]n, [Ni(pda)(bix)(H2O)]n, [Cu(pda)(bix)2(H2O)2]n·8nH2O, [Co2(μ-OH)(pda)(ptz)]n·nH2O, [Co(hfipbb)(bix)0.5]n, and [Co(2,6-pydc)(bix)1.5]n·4nH2O》 in relation to this compound, is published in Crystal Growth & Design. Let’s take a look at the latest research on this compound (cas:14389-12-9).

Six new metal complexes with the formulas [Co(pda)(bix)]n (1), [Ni(pda)(bix)(H2O)]n (2), [Cu(pda)(bix)2(H2O)2]n·8nH2O (3), [Co2(μ-OH)(pda)(ptz)]n·nH2O (4), [Co(hfipbb)(bix)0.5]n (5), and [Co(2,6-pydc)(bix)1.5]n·4nH2O (6) have been synthesized by the reactions of Co(II), Ni(II), and Cu(II) salts with two flexible ligands 1,4-phenylenediacetic acid (H2pda) and 1,4-bis(imidazol-1-ylmethyl)benzene (bix) in the presence of coligands 5-(4-pyridyl)tetrazole (4-ptz), 4,4′(hexafluoroisopropylidene)bis(benzoic acid) (H2hfipbb), and 2,6-pyridinedicarboxylic acid (2,6-H2pydc) and characterized by single crystal x-ray diffraction anal., IR spectroscopy, and thermogravimetric (TG) anal. Because of the coordination geometry around the metal ions and the diverse coordination modes of the flexible ligands in combination with the rigid and flexible coligands, the obtained complexes show diverse structures from a one-dimensional (1D) chain to three-dimensional (3D) coordination polymers. 1, 4, 5, And 6 are Co(II) complexes in which Co(II) ions show tetrahedral coordination in 1, trigonal bipyrimidal coordination in 4, and octahedral coordination in 5 and 6. Complexes 2 and 3 are resp. Ni(II) and Cu(II) complexes in which the metal ions are present in octahedral coordination geometries. Factors affecting the conformational change of the flexible ligands in the self-assembly process of coordination polymers, such as, coordination geometry around the metal ions and geometry of the coligands have been systematically studied. The rotation of the bonds C(sp3)-C(sp2) and C(sp3)-N(sp3) in H2pda and bix ligands causes different conformations (cis, trans, gauche); these conformations have been studied by measuring the torsion angle. A comparative study between the torsion angle of the particular conformation of the ligands and coordination geometry of metal ion/geometry of the coligand has been undertaken. All the possible cis, trans, and gauche conformations of the flexible ligands have been obtained/observed in the authors’ complexes. Theor. calculations were performed to determine the energies of the different conformations of the flexible ligands. The electronic properties of these complexes have also been studied in the solid state at room temperature Finally, the temperature-dependent magnetic studies for compounds 4 and 5 are described.

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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

Formula: C5H10Br2. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 1,5-Dibromopentane, is researched, Molecular C5H10Br2, CAS is 111-24-0, about Photosensitizer with High Efficiency Generated in Cells via Light-Induced Self-Oligomerization of 4,6-Dibromothieno[3,4-b]thiophene Compound Entailing a Triphenyl Phosphonium Group. Author is Wang, Lingna; Huang, Yanyan; Yu, Yingjie; Zhong, Huifei; Xiao, Haihua; Zhang, Guanxin; Zhang, Deqing.

Photodynamic therapy (PDT) has emerged as an attractive alternative in cancer therapy, but therapeutic effects suffer from low photosensitizing efficiency and poor retention of photosensitizes in cancer cells. This paper reports the photosensitizers which show absorption and emission in the long-wavelength region and high photosensitizing efficiency can be formed in situ in cells from 4,6-dibromothieno[3,4-b]thiophene derivative (TT-5-P) after white light irradiation The self-oligomerization of TT-5-P is uptaken in cells upon light irradiation-induced cell apoptosis simultaneously and efficiently. In addition, the formation of oligomers (TT-5-Ps) enhances the retention time in cells remarkably, which is advantageous for boosting the photodynamic therapy efficiency. Moreover, the selectivity toward tumor cells of TT-5-P can be improved obviously via the formation of complex of TT-5-P with albumin. This in situ photoinduced self-oligomerization strategy can be utilized to design effective biomaterials for long-term imaging and improved therapy.

Here is a brief introduction to this compound(111-24-0)Formula: C5H10Br2, if you want to know about other compounds related to this compound(111-24-0), you can read my other articles.

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 《Phosphines and phosphine sulfides containing highly condensed aromatic groups》. Authors are Tefteller, Wilburn Jr.; Zingaro, Ralph A.; Isbell, A. 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).Synthetic Route of C30H21P. Through the article, more information about this compound (cas:3411-48-1) is conveyed.

The preparation and properties of 4 new phosphines and 6 new phosphine sulfides are reported. Preparation of the phosphines is accomplished by condensation of a P trihalide, or substituted halide with the aryllithium compound in an inert atm. The sulfides are prepared by refluxing the phosphine with S in an appropriate solvent. The phosphines and sulfides are colorless solids.

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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

Heterocyclic compounds can be divided into two categories: alicyclic heterocycles and aromatic heterocycles. Compounds whose heterocycles in the molecular skeleton cannot reflect aromaticity are called alicyclic heterocyclic compounds. Compound: 14389-12-9, is researched, Molecular C6H5N5, about Solid state coordination chemistry of polyoxomolybdate clusters: Hydrothermal synthesis and structures of [{Cu3II(4-pt)2(4-Hpt)2(H2O)2}{Mo8O26}]·2H2O and [{Cu10I(4-pt)6(4-Hpt)2}{Mo8O26}]·2H2O (Hpt = 5(4′-pyridyl)tetrazole), the main research direction is copper pyridyltetrazole polyoxomolybdate preparation magnetic susceptibility thermolysis; crystal structure copper pyridyltetrazole polyoxomolybdate.Synthetic Route of C6H5N5.

The hydrothermal reactions of MoO3, Cu(CH3CO2)2·H2O and 5(4′-pyridyl)tetrazole (4-Hpt) yielded a low temperature Cu(II) phase [{Cu3(4-pt)2(4-Hpt)2(H2O)2}{Mo8O26}]·2H2O (1·2H2O) and a high temperature Cu(I) material [{Cu10(4-pt)6(4-Hpt)2}{Mo8O26}]·2H2O (2·2H2O). The two-dimensional structure of 1 is constructed from β-octamolybdate clusters embedded in a {Cu3(4-pt)2(4-Hpt)2(H2O)2}n4n+ network. The copper(II)-pyridyltetrazolate layer consists of trinuclear clusters of corner-sharing copper ‘4 + 2’ octahedra linked through the dipodal 4-pt ligands. In contrast, the three-dimensional structure of 2 contains the {β-Mo8O26}4- building block embedded in a three-dimensional {Cu10(4-pt)6(4-Hpt)2}n4n+ framework. The copper(I)-pyridyltetrazolate substructure consists of chains of Cu tetrahedra and trigonal planes bridged by tetrazolate groups and connected through exo-catenate {CuN2O} trigonal planar units bonding to the pyridyl nitrogens of the dipodal ligand.

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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

Gready, Jill E. published an article about the compound: 2-Aminoquinazolin-4(3H)-one( cas:20198-19-0,SMILESS:O=C1NC(N)=NC2=C1C=CC=C2 ).Recommanded Product: 20198-19-0. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:20198-19-0) through the article.

A purely structural definition of aromaticity based on the average ring bond length and π-bond order is proposed. The definition is illustrated for N-heterocycles by reference to theor. sto-3G and 3-21G geometries and charges for some pteridine derivatives The treatment focuses on the gross structural changes (i.e., ring size, overall degree of π-electron delocalization, and net ring charges), accompanying chem. changes, such as substitution, tautomerization, ring reduction, and deazination, as well as the structural interdependence of the two rings in a bicyclic ring system.

Here is a brief introduction to this compound(20198-19-0)Recommanded Product: 20198-19-0, if you want to know about other compounds related to this compound(20198-19-0), you can read my other articles.

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