Different coordinative behaviour of methyl-substituted 2-pyridylsulfonamide derivatives as ligands in zinc complexes
摘要:
Neutral zinc complexes [ZnL2L'] of a series of methyl-substituted N-2-pyridylsulfonamide ligands (HL) and 1,10-phenanthroline or 2,2'-bipyridine (L') have been synthesised by electrochemical oxidation of anodic zinc metal in an acetonitrile solution of the ligand and the coligand. The compounds obtained have been characterised by microanalysis, IR and H-1 NMR spectroscopy, LSI mass spectrometry studies and some of the mixed complexes by single-crystal X-ray diffraction. The crystal structures show different octahedral environments around the metal (N6 or N4O2) depending on the position of the substituent on the pyridine ring. (C) 2003 Elsevier Science Ltd. All rights reserved.