Yttrium and lanthanide perchlorate complexes of 2,3-dimethyl-4-formyl- [2' -(aminomethyl)pyridine]-1-phenyl-3-pyrazoline-5-one and 2,3-dimethyl-4-formyl(benzhydrazide)-1-phenyl-3-pyrazolin-5-one

School of Chemical Sciences, Mahatma Gandhi University, Kottayam-686 560, Kerala, India

E-mail : pkrkn@yahoo.co.in

Manuscript received 12 January 2009, revised 20 July 2009, accepted 20 August 2009

Two series or complexes of two Schiff bases, 2,3-dimethyl-4-formyl-[2'-(aminomethyl)pyridine]-1-phenyl-3- pyrazolin-5-one (L₁) and 2,3-dimethyl-4-formyl(benzhydrazlde)-1-phenyl-3-pyrazolin-5-one (L₂), with the general compositions [Ln(L₁)₂(CIO,V₂](CIO₄) and [Ln(L₂}₂(CIO₄)](CIO₄)₂ (where Ln = Y, La, Pr, Nd, Sm, Eu, Gd, Dy, Ho or Er) have been synthesized and characterized, Both L₁ and L₂ are neutral ligands coordinating through the carbonyl oxygen(s) and the azomethine nitrogen In these complexes. Two perchlorate ions are bidentately coordinated in the complexes of L₁ and one perchlorate ion is bidentately coordinated in the complexes or L₂. A coordination number or eight is assigned to the metal In both series or complexes.