Synthesis and structure of a new copper(II) complex with 3,4'-bi-1,2,4-triazolate.

Abstract The salt diaquo-diammine-bis(3,4′-bi-1,2,4-triazolate) copper(II) of the formula [Cu(bTA − ) 2 (NH 3 ) 2 (H 2 O) 2 ] has been synthesized and structurally characterized by X-ray single crystal diffraction analysis. This complex adopts a monomeric structure. This monomer crystallizes in the triclinic system, space group P 1 ¯ with a  = 5.9657 A; b  = 6.8975 A; c  = 9.9892 A; α  = 106.181°; β  = 97.868°; γ  = 90.800° and Z  = 1. The Cu atom is coordinated by two nitrogen atoms of two monodentate bitriazolate ligands, two nitrogen atoms of NH 3 and two water molecules in a distorted octahedral geometry. The complex has been also characterized by elemental analysis and studied by electronic and vibrational spectroscopy. The obtained results are in good agreement with the structure determined by X-ray diffraction analysis.