Structural and Crystallographical Studies on the Polymetallic Chelates of Naphthazarin with Cobalt (II), Nickel (II) and Copper (II)

Pyrolysis has shown that the polymetallic chelates of naphthazarin with Co(II), Ni(II) and Cu(II) assumed compositionally defined structures as [(C10H6O4)(M)2xH2O]yH2O where M stands for Co(II)/Ni(II)/Cu(II), x = 04, 04, 00, (coordinated water), y = 3, 11/2, and 4, (lattice water) respectively satisfying the metal ligancy. Each crystal of polymetal chelate assumed cubic symmetry with forbidden number 7, 15, 23 etc being absent. The inter planer spacing d (A0), a A0 (cell unit), of ρ g/cc and molecular weights of the polymetal chelates have been determined and reported. The calculated formula weight showed correspondence to the found molecule weight of each of the polymetal chelate. Keywords; Pyrolysis, Naphthazarin, Cubic, Crystallographics, X-ray