SYNTHESIS AND CHARACTERIZATION OF NEW HYPERVALENT
ORGANOTIN COMPOUNDS

Rozalia-Vilma Bojan and Cristian Silvestru

“Babes-Bolyai” University, Faculty of Chemistry & Chemical Engineering, 11 Arany Janos St., RO-400028 Cluj-Napoca, Romania;
E-mail:  brvilma@chem.ubbcluj.ro

Divalent as well as tetravalent tin have empty 5d orbitals of suitable energy to get involved in hybridization to achieve a higher coordination number. A large number of organotin compounds with C,Y-chelating ligands (Y = heteroatom-containing substituent) are known in which the tin atom increases its coordination number through intramolecular interaction with the heteroatom. The aim of the research is to design and synthesize new chelating ligands with more then one heteroatom with potential for intramolecular interactions as well as to study the new organotin(II) compounds formed with the organic ligands of the following types:

Conventional preparative methods were used to obtain the organic ligands. The main interest was focused on the organotin(II) compounds of the type R2Sn and RSnCl (R = organic moiety), because these compounds can be further used as ligands in transition metal chemistry. The compounds were investigated by multinuclear NMR (1H, 13C, 119Sn) spectroscopy.