Premium
Transition Metal Complexes of an Antipyrine Derivative
Author(s) -
Shoukry Mohamed M.,
Elmoghayar Mohamed R. H.,
Ibraim Mohamed K. A.,
Elghandour Ahmed H. H.
Publication year - 1987
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.198700003
Subject(s) - chemistry , ionic radius , electronegativity , inorganic chemistry , transition metal , stability constants of complexes , chelation , thiourea , ligand (biochemistry) , copper , metal , metal ions in aqueous solution , ionic bonding , crystallography , ion , organic chemistry , catalysis , biochemistry , receptor
The stepwise formation constants of N ‐antipyrinyl‐ N ′‐3‐phenyl‐2‐propenoyl‐thiourea (I) complexes with metal ions of the first transition series, Cu(II), Ni(II), Co(II), Mn(II) and Zn(II) have been determined in 70% (V/V) ethanol‐water medium. The formation constants for the chelates follow the Irving‐Williams series: Zn(II)Ni(II)>Co(II)>Mn(II) The effect of ionic radius and electronegativity on the chelate formation are discussed. Complexes of Cu(II) and Ni(II) have been synthesised and characterised by elemental analysis, electrolytic conductance, IR spectra and magnetic susceptibility measurements. The ligand forms bis ‐complexes with Cu(II) and Ni(II). The binding sites are oxygen and sulphur atoms.