STUDIES ON THE CHEMISTRY OF ORGANOLEAD(IV) COMPOUNDS CONTAINIG  CHALCOGENOLATO LIGANDS

Adina Cristea and Cristian Silvestru

“Babes-Bolyai” University, Faculty of Chemistry & Chemical 
Engineering, 11 Arany Janos St., RO-400028 Cluj-Napoca, Romania;
E-mail:  adinacristea2004@yahoo.com

Metathesis reactions between several organolead(IV) chlorides (Ph3PbCl, Me3PbCl, Ph2PbCl2) and Na[S2CNMe2]·2H2O or [Et2NH2][S2CNEt2], in 1:1 and 1:2 molar ratios, were performed in CDCl3 and the resulted complexes were investigated by 1H and 13C NMR. The molecular structure of Ph2PbCl(S2CNMe2) (1) was established by single-crystal X-ray diffraction. The crystal contains discrete molecules, with a distorted trigonal bipyramidal coordination environment around the lead atom due to the monometallic biconnective pattern of the dithioligand. The β-diketimine [(2,6-Pri2-C6H3)NC(Me)]2CH2 (2) was prepared from (2,6-Pri2-C6H3)NC(Me)CH2C(Me)O (3) and 2,6-diisopropylaniline, and it was characterized by NMR spectroscopy.(1H, 13C and 2D experiments). The reactions of the lithium salts of 2 and 3 with Me3PbCl and Ph2PbCl2 are reported. The isolated products were characterized by NMR spectroscopy in solution.

Ph2PbCl(S2CNMe2) (1)