Synthesis, spectral characterization of the zinc(II) mixed-ligand complexes of N(4)-allyl thiosemicarbazones and N,N,N′,N′-tetramethylethylenediamine, and crystal structure of the novel [ZnL2(tmen)] compound
摘要:
Mixed-ligand zinc complexes with N,N,N',N'-tetramethylethylenediamine (tmen) and R-salicylaldehyde N(4)-allyl thiosemicarbazones (R: 3-OCH3 (L-1), 5-Br(L-2)), [ZnL1,2(tmen)], were synthesized and the complexes were characterized by elemental analysis, atomic absorption spectrometer, magnetic susceptibility, molar conductivity, electrospray ionization (ESI) and atmospheric pressure chemical ionization (APCI) mass spectra and IR, UV-Vis, H-1 NMR and N-15 spectroscopies. Crystal of [ZnL2(tmen)] have a slightly distorted square pyramid involving O, N, S atoms of thiosemicarbazone and one N atom of tmen in basal plane and the other N atom of tmen in apex of the pyramid. The non-coordinated allyl group is disordered. (C) 2007 Elsevier Ltd. All rights reserved.
Synthesis, spectroscopic and crystallographic characterization of the cobalt(III) ternary mixed-ligand complexes of N(4)-allyl/methyl thiosemicarbazones, N,N,N′,N′-tetramethylethylenediamine and azide
Mixed-ligand ternary cobalt(III) complexes consisting of N,N,N′,N′-tetramethylethylenediamine (tmen), R-salicylaldehyde-N(4)-allyl/methyl thiosemicarbazones (R=3-OMe (LI/LII) or H (LIII/LIV) and azide, of general formula [CoL(tmen)(N3)], were synthesized and characterized by physico-chemical and spectroscopic methods. The crystal structure of [CoLI(tmen)(N3)] has a slightly distorted octahedral coordination