5 research outputs found
Mixed ligand complexes of cobalt(II and III) — Molecular structure of <i>bis-</i>(4-acetophenylsalicylaldiminato)acetylacetonato cobalt(III)
1050-1054The bidentate
Schiff bases, HL'(= N-4-acetophenylsalicylal-dimine), H"(=N-3-acetophenylsalicylaidimine)
and HL'"(=N-4-acetophenyl-5-bromosalicylaldimine) do not form complexes
with simple cobalt(II)salts, e.g.,Co(CH3COO)2.4H2O
and CoCl2.6H2O but undergo facile reactions with Co(acac)2.2H2O
(acac=monoanion of acetylacetone). Mixed ligand complexes of both cobalt(III), [Co(L)2(acac)]
and cobalt(II), [Co(L)(acac)] (L=L', L", L"') have
been isolated and characterised by elemental analyses and magnetic susceptibility
measurements, electronic, IR and mass spectral studies and by single crystal X-ray
crystallographic structure analysis. The cobalt atom is octahedrally coordinated
in which four ligand oxygen atoms define an equatorial plane; the two nitrogen atoms
of the L' ligands are in trans-axial positions
Synthesis and reactivity of the copper (II) complexes of N-α-acetophenyl-X-salicylaldimines (α = 4 or 3, X = H, 5-Br or 3-COOH ). Molecular structure of <i>bis-</i>(N-4-acetophenyl-salicylaldiminato) copper(II)
1380-1384The copper (II)
complexes of the Schiff bases, N-α-acetophenyl-X-salicylaldimines (α = 4 or 3,
X = H, 5-Br or 3-COOH) have been synthesised and characterised by UV-visible, IR,
MS, ESR spectroscopy and magnetic susceptibility measurements. The solid state
structure of Cu(SACPNx)2 (I) determined by single-crystal
X-ray diffraction reveals a distorted square-planar metal coordination involving
two imine N- and two deprotonated phenolate O atoms of two bidentate Schiff ligands
in trans- arrangement. Both the Schiff bases and their copper (II) complexes
undergo facile transamination reactions