914616-88-9Relevant academic research and scientific papers
Structures of Co, Pd and Ni complexes with iminopyridine ligands having an hydroxymethyl or acrylate pendant group
Kuwabara, Junpei,Takeuchi, Daisuke,Osakada, Kohtaro
, p. 2459 - 2465 (2009)
Co(II), Pd(II) and Ni(II) complexes with iminopyridine ligands have different coordination structures in the solid state, depending on the metal, pendant group of the pyridyl ring and recrystallization conditions. The iminopyridine ligand having an acrylate group, Ar-N{double bond, long}CH-2,6-C5H3N-CH2-OCO-CH{double bond, long}CH2 (L1: Ar = 2,6-diisopropylphenyl), forms a Co(II) complex whose metal center has a trigonal pyramidal coordination with two chloride ligands and an N,N'-bidentate ligand L1. Both L1 and the iminopyridine ligand with a CH2OH pendant on the pyridyl ring, Ar-N{double bond, long}CH-2,6-C5H3N-CH2-OH (L2: Ar = 2,6-diisopropylphenyl), coordinate to the PdCl2 moiety, giving complexes with a square-planar coordination. The reaction of L1 with [NiBr2(H2O)3] and recrystallization of the products forms crystals which contain mono- and dinuclear complexes with aqua ligands and the N,N'-bidentate ligand. L2 is coordinated to the Ni(II) center as an N,N',O-tridentate ligand. Recrystallization of the products of the reaction of L2 with [NiBr2(H2O)3] with and without excess H2O in the solution yields crystals of the cationic octahedral complex with two aqua ligands [NiBr(H2O)2(L2)]Br and the neutral square pyramidal complex [NiBr2(L2)], respectively.
