New hypercoordinated diorganotin(IV) compounds with dithiocarbamato ligands. Synthesis and structural characterization

Publication date: Available online 1 November 2018Source: Journal of Organometallic ChemistryAuthor(s): Nora Chiorean, Cristina Coza, Alexandra Pop, Anca SilvestruAbstractSeveral homo- and heteroleptic diorganotin(IV) dithiocarbamato halides of type RR'Sn(S2CNR″2)Cl [R = R' = Me, R'' = Me (1), Et (2); R = R' = nBu, R'' = Me (3), Et (4); R = 2-(Me2NCH2)C6H4, R' = Me, R'' = Me (5), Et (6)] and pseudo-halides of type RR'Sn(S2CNR″2)(NCS) [R = R' = Me, R'' = Me (7), Et (8); R = R' = nBu, R'' = Me (9), Et (10); R = 2-(Me2NCH2)C6H4, R' = Me, R'' = Me (11), Et (12); R' = nBu, R'' = Et (13), R' = 2-(Me2NCH2)C6H4, R'' = Me (14), Et (15)] were prepared by salt metathesis reactions, starting from either RR'SnCl2 or RR'Sn(NCS)2. In all compounds the dithiocarbamato ligand acts as a bidentate moiety. For the compounds 11–15, as well as for the species 5 and 6, of type RR'Sn(S2CNR″2)Cl, bearing aromatic groups with pendant arms attached to tin, the NMR spectra gave no clear evidence for a N→Sn coordination in solution at room temperature. The molecular structures determined by single-crystal X-ray diffraction for compounds 12 and 14, with one or two 2-(Me2NCH2)C6H4 groups, respectively, revealed the existence of intramolecular N→Sn interactions in solid state. The IR spectra suggest an isothiocyanato behavior of the NCS group in solid state in all cases, while the 119Sn NMR spectra gave no cl...
Source: Journal of Organometallic Chemistry - Category: Chemistry Source Type: research