133598-60-4

Upstream product

• 126807-72-5 CuBr(C₅H₅NS) 
• 1038-95-5 Tri(p-tolyl)phosphine 
• 131972-40-2 C₁₀H₁₀Br₂CuN₂S₂ 

Relevant academic research and scientific papers

Metal-heterocyclic thione interactions. 13. Pyridine-2-thione derivatives of copper(I): Crystal structure of dinuclear [bromo(pyridine-2-thione)(tri-p-tolylphosphine)copper(I)]2 complex

The sulfur-bridged dinuclear copper (I) complex, [CuBr(η2-S-μ-C5H5NS) (p-Tol3P)]2 (1) was prepared by the reaction of insoluble CuBr2(C5H5NS)2 {from copper(II) bromide and pyridine-2-thione(C5H5NS) in ethanol} with excess tri-p-tolylphosphine (p-Tol3P) in chloroform (1:2 mole ratio). Similarly, other copper(I) complexes of stoichiometry [CuX(C5H5NS)(Ph3P)]2 {X = Cl, 2 and 1, 3} were prepared. Compound 1 crystallised from a dichloromethane-chloroform-methanol mixture and exists as a centrosymmetric sulfur-bridged dimer with distorted tetrahedral geometry about each Cu atom; the other two positions of each Cu atom being occupied by a P atom from p-Tol3P and a bromine atom. The central core Cu2S2 of the dimer is a parallelogram with the important interatomic parameters as follows: Cu-P, 2.2376(13), Cu-S, 2.3895(19), 2.415(2), Cu-Br, 2.4455(11), S-C(2), 1.717(4), Cu-Cu*, 3.250(2), S-S*, 3.539(3) A?; Cu-S-Cu*, 85.14(6), S-Cu-S*, 94.86(6), Cu-S-C(2), 108.41(14), 113.12(16)°. The dimer structure is stabilised by strong intramolecular N-H···Br hydrogen bonds [3.319(5) A?]. The X-ray study of 2 showed that it has transformed into monomer [CuCl(η1-S-μ-C5H5NS) (Ph3P)2] (4) during crystal growth. The strong intramolecular N-H···Cl hydrogen bonding appears to stabilise the monomer. All the compounds were characterised using analytical data, IR and far-IR (4000-100 cm-1), UV-Vis spectra, NMR (1H, 13C) and for 1 and 4 using X-ray crystallography. The factors controlling Cu···Cu interaction in the sulfur-bridged dinuclear copper(I)-heterocyclic thione complexes are described.

The chemistry of pyridinethiols and related ligands - VII. Preparation and spectroscopy of mixed-ligand copper(I) complexes: The crystal structure of first mixed-ligand dinuclear [iodo(pyridine-2-thione) (tri-p-tolylphosphine)copper(I)]2 complex

Direct reaction of copper(I) iodide with pyridine-2-thione (C5H5NS) and tri-p-tolyl phosphine (p-Tol3P) in 1:1:2 ratio in refluxing chloroform formed a product of stoichiometry, [Cul(C5H5NS)(p-Tol3P)]2 (5), whose X-ray crystal structure has been determined. It crystallises from a dichloromethane-ethanol mixture and exists as a centrosymmetric sulfur bridged dimer with distorted tetrahedral geometry about each Cu atom ; the other two positions of each Cu atom being occupied by a P atom from p-Tol3P and a iodine atom and the central core Cu2S2 of the dimer is planar. The interatomic important parameters are: Cu - P = 2.243(3), Cu - S, 2.393(4), 2.425(4), Cu - I, 2.603(2), C - S, 1.690(12) A, Cu - S - Cu, S - Cu - S, and Cu - S - C bond angles are 85.25(13), 94.75(13) and 107.0(4) respectively. The dimer structure is stabilised by strong intramolecular N - H...T hydrogen bonds. The solution phase behaviour of 5 and other related mixed-ligand copper(I) complexes, [CuX(C5H5NS)L]2 [X = Cl, L = p-Tol3P (1), X = Br, L = m-Tol3P (2), p-Tol3P (3), X = I, L = m-Tol3P (4)] is also studied using electronic absorption and multinuclear (1H, 13C and 31P) NMR spectroscopy.