Synthesis and Characterization of some First Row Transition Metal Picrates

Abstract

Transition metal picrates of the empirical compositions Ti(Picrate) CI/Sub3, Ti (Picrate)/Sub2CI/Sub2, Cr (OH) (H/Sub2O)/Sub6 (Pierate)/Sub2 and M(H/Sub2O)x (Picrate)/Sub2 (where M=Mn (II), Fe (II), Co(II), Ni(II), Cu(II) and Zn(II) and x=4for Cu(II), 8 for Fe(II) & 6 for others) have been prepared and characterized by elemental analysis, molar conductance, magnetic susceptibility measurements, infrared and electronic spectral studies. Molar conductances and molecular weights of the soluble metal picrates show that TiCI/Sub2 (Picrate)/Sub2 is non electrolyte whereas others are 1:2 electrolytes. Magnetic susceptibility and electronic spectral I studies indicate that(II) picrate is square planar, whereas those of Cr(III) Mn(II0, Fe(II),Co(II) and NI(II) are spin free octahedral. The infrared spectral studies of the hydrated and anhydrous metal picrates show: (i) that phenolic group of the picric acid is involved in bounding with the metals;(ii) the water molecules in the hydrated metal picrates coordinated and (iii) the-NO/Sub2 groups do not participate in bonding with the metals.