The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: 1,5-Dibromopentane, is researched, Molecular C5H10Br2, CAS is 111-24-0, about Rational synthesis, structural characterization, theoretical studies, antibacterial activity and selective dye absorption of new silver coordination polymers generated from a flexible bis (imidazole-2-thione) ligand, the main research direction is silver pentadienyl bisdihydroimidazolethione coordination polymer preparation luminescence thermal stability; bactericide luminescence band gap silver pentadienyl bisdihydroimidazolethione coordination polymer; crystal structure silver pentadienyl bisdihydroimidazolethione coordination polymer.Quality Control of 1,5-Dibromopentane.
Herein, a competition between the different anions with different size, shape and coordination ability was used for the synthesis of three silver(I)-coordination polymers (Ag-CPs) was investigated. In this study, three 3D-supra-mol. coordination compounds namely, [Ag2L(NO3)2]n (1), {[Ag2L][PF6]2}n (2) and [AgLBr]n (3) (L = 1,1′-(1,5-pentadienyl)bis-(1,3-dihydro-3-methyl-1H-imidazole-2-thione)) were synthesized and fully characterized via a single crystal X-ray diffraction, powder X-ray diffraction (PXRD), elemental anal. (CHN), FT-IR spectra and thermo gravimetric anal. (TGA). Structural anal. revealed that the counter ions have a notable impact in directing the conformation and coordination mode of ligand, but they have no effect on the structural dimension of the polymers. Furthermore, by increasing the coordination ability of the anions, the coordination geometry of the AgI centers change, from a distorted linear (for 2) to a distorted square pyramidal coordination geometry (for 1). The chains are further stabilized by the intermol. C-H···O and C-H···N for 1, P-F…H-C for 2, C-H···Br and C-H···N interactions for 3 to form a 3D non-covalent lattice network structure. In contrast to 1 and 3, polymer 2 exhibits a large capacity and selectivity to adsorb dye from aqueous solutions Sorption kinetic was investigated by three kinetic models. The electronic band structure and the projection densities of states (PDOS) of compounds 1 and 3 were investigated by means of DFT-D3. The results demonstrated that both compounds are non-magnetic and show a semiconducting character with a direct band gap of ∼3 eV. All of the synthesized compounds, possess antibacterial activity against the selected strain of Gram- neg. (Escherichiacoli, Pseudomonas aeruginosa) and Gram- pos. (Staphylococcus aureus, Bacillus subtilis) bacteria.
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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