Organoantimony(iii) compounds containing (imino)aryl ligands of the type 2-(RNCH)C6H4 (R = 2′,4′,6′-Me3C6H2, 2′,6′-iPr2C6H3): bromides and chalcogenides†
Abstract
The reaction of 2-(RNCH)C6H4MgBr [R = 2′,4′,6′-Me3C6H2 (R1), 2′,6′-iPr2C6H3 (R2)] [prepared from 2-(R1NCH)C6H4Br (1) or 2-(R2NCH)C6H4Br (2) and Mg] with SbCl3 in a 2 : 1 and 1 : 1 molar ratio followed by treatment with an aqueous KBr solution gave [2-(R1NCH)C6H4]2SbBr (3) and [2-(R2NCH)C6H4]2SbBr (4) as well as [2-(R1NCH)C6H4]SbBr2 (6) and [2-(R2NCH)C6H4]SbBr2 (7). Treatment of 4 with Na2S·9H2O provided the dinuclear [{2-(R2NCH)C6H4}2Sb]2S (5). Heterocyclic species, i.e. the oxide cyclo-[{2-(R2NCH)C6H4}SbO]3 (8) and the sulfides cyclo-[{2-(R1NCH)C6H4}SbS]2 (9) and cyclo-[{2-(R2NCH)C6H4}SbS]2 (10), were obtained by reacting dibromides 6 and 7 with