Isomorphous dinuclear copper(I) complexes bridged by 4-methyl-1H-1,2,4-triazole-5-thiol­ate ligands: chloride and bromide analogues

Abstract

The title isomorphous copper(I) coordination complexes, bis­(μ-4-methyl-1H-1,2,4-triazole-5-thiol­ato)bis­[chlorido­(tri­phenyl­phosphane)copper(II)], [Cu₂(C₃H₅N₃S)₂Cl₂(C₁₈H₁₅P)₂], and bis­(μ-4-methyl-1H-1,2,4-triazole-5-thiol­ato)bis­[bromido­(tri­phenyl­phosphane)copper(II)], [Cu₂(C₃H₅N₃S)₂Br₂(C₁₈H₁₅P)₂], were synthesized from copper(I) halide salts and a mixed-ligand system containing Hmptrz and PPh₃ in aceto­nitrile (Hmptrz = 4-methyl-1H-1,2,4-triazole-5-thione and PPh₃ = tri­phenyl­phosphine). The asymmetric unit comprises one-half of the dinuclear complex, with each copper(I) center exhibiting a distorted tetra­hedral coordination geometry defined by one halide ion, one phospho­rus atom from PPh₃, and two μ-S bridging from Hmptrz bridging mol­ecules. The two μ-S bridges [Cu—S—Cu ≃ 70.2°] connect pairs of copper(I) atoms to generate a lozenge-shaped, centrosymmetric Cu₂S₂ core. In the extended structure C—H⋯X (X = Cl or Br) hydrogen bonds link the dimers into a three-dimensional supra­molecular architecture. Hirshfeld surface and two-dimensional fingerprint plot analyses were also carried out to investigate and qu­antify the inter­molecular contacts governing the crystal packing.