Preparation and structure of tin(IV) catecholates by reactions of C,N-chelated tin(IV) compounds with a catechol or lithium catecholate, and various stannylenes with a quinone

Abstract Various tri-, di- and monoorganotin(IV) catecholates were prepared independently by three different reaction pathways, e.g. elimination of a small molecule (lithium halide) from the conversion of organotin(IV) halide with lithium catecholate, condensation or protonolytic reactions of organotin(IV) oxide or hydride with catechol and reduction of a quinone by distannane, organotin(IV) hydride or stannylene. C , N -chelating 2-[(CH 3 ) 2 NCH 2 ]C 6 H 4 – = L CN , bulky amido ([2,6-( i Pr)C 6 H 3 ](SiMe 3 )N– = L N and amido-amino chelating ({2-[(CH 3 ) 2 NCH 2 ]C 6 H 4 }(SiMe 3 or GePh 3 )N– = L NN1 or L NN2 ligands were used in this study. All tin(IV) catecholates reveal dimeric structures with six-coordinated tin atoms except for (L CN ) 2 Sn{(3,5-( t -Bu) 2 C 6 H 2 ]-1,2-(O) 2 )} which is monomeric due to the presence of two C , N -chelating ligands. All compounds, including two hydrolysis products, were characterized by a multinuclear NMR approach and X-ray diffraction techniques.