Ten chelates of Nickel (II) with different polyaminocar­boxylic acids which were successful in removing nickel from body organs (in vivo) and from their sub-cellular fractions (in vitro) of experi menta lly poi soned rats,. were prepa red and cha ra teri sed. Thei r structure has been i nvesti gated on the bas is of infra red spectra 1 and magneti c moment data. The experimental data suggest that all the complexes are tetra-co-ordinated with sp3 hybridization having tetrahedral geometry. 


S K TANDON ,A K MATHUR ,