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

The salt diaquo-diammine-bis(3,4'-bi-1,2,4-triazolate) copper(II) of the formula [Cu(bTA-)2(NH3)2(H2O)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 P1 with a=5.9657 Å; b=6.8975 Å; c=9.9892 Å; α=106.181°; ß=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 NH3 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.

[Theoretical and experimental vibrational spectroscopy study of K3Ln(PO4)2 phosphates]. / Etude théorique et expérimentale des spectres de vibration des phosphates K3Ln(PO4)2.

The monoclinic phosphates with K3Ln(PO4)2 (Ln=rare earth) formula were synthesized. Their infrared and Raman spectra have been reported and analysed. The results of a force field calculation for K3Nd(PO4)2 are presented.

[Vibrational spectra of monoclinic diphosphates of formula AMP2O7]. / Spectres de vibration des diphosphates monocliniques de formule AMP2O7.

The monoclinic pyrophosphates with AMP2O7 formula were synthesized. Their infrared and Raman spectra have been reported and analysed. The results of a force field calculation for CaCuP2O7 are presented.

[Spectrum analysis of monophosphates SrMN(PO4)2, where M=Co, Ni]. / Etude vibrationnelle des monophosphates SrM2(PO4)2 avec M=Co, Ni.

The infrared and Raman spectra of triclinic phosphates SrM2(PO4)2 where M = Co, Ni have been reported and analysed. The results of a force field calculation for SrNi2(PO4)2 are presented.