Heterobimetallic complexes of the type [Cu(TETA)Cl2MCl2] (M = Si, Ge, Sn, Ti and Zr; TETA = tiethylene tetramine) have been synthesized and characterized by elemental analyses, ESR, electronic and IR spectra and conductivity measurements. The complex [Cu(TETA)Cl2SnPh2] has also been prepared. The results indicate that [Cu(TETA)]Cl2 is square planar and ionic in nature, while its bimetallic complexes, [Cu(TETA)Cl2MCl2] and [Cu(TETA)Cl2SnPh2], are covalent with an octahedral environment around the copper(II) ion. © 1993.
Siddiqi, K. S., Aqra, F. M. A. M., Shah, S. A., Zaidi, S. A. A., Casabo, J., & Teixidor, F. (1993). A transition metal complex as a ligand in the chemistry of group (IV) elements. Polyhedron, 12(8), 949-953. https://doi.org/10.1016/S0277-5387(00)81552-1