Synthetic, spectroscopic, and X-ray studies on methylmercury(<scp>II</scp>) and dimethylthallium(<scp>III</scp>) complexes with cyclopentanone thiosemicarbazone

Abstract

Compounds of cyclopentanone thiosemicarbazone (HL) have been prepared from methylmercury(II) chloride or dimethylthallium(III) hydroxide. The crystal structure of TlMe2(L)·HL has been determined. The compound crystallizes in the monoclinic space group P21/c(no. 14) with a= 12.088(4), b= 13.656(3), c= l3.271(4)Å, β= 108.68(2)°, and Z= 4 (R= 0.069, R′= 0.076). Two different types of ligand molecules are present in the lattice. One, L, deprotonated and chelated to Tl and the other one, HL, weakly bonded to Tl and hydrogen bonded to L. The i.r., 1H and 13C n.m.r. spectra of the compounds are discussed in the light of the crystallographic data.