Reactions of organotin chlorides R2SnCI2 (R=Et,Bu~t,or Ph) with lithium 4,6-di(tert-butyl)-N-(2,6-diisopropylphenyl)-o-amidophenolate. Synthesis and structures of tin(IV) o-iminoquinone complexes

摘要

The exchange reactions of tin diorganohalides R2SnCl2 (R=Et,Bu~t,or Ph) with lithium amidophenolate APLi2 (AP is the 4,6-di(tert-butyl)-N-(2,6-diisopropylphenyl)-o-iminobenzo-quinone dianion) in tetrahydrofuran produced the new five-coordinate (Et2SnAP(THF) (3)) and four-coordinate (R2SnAP (R=Bul,Ph)) tin(rv) complexes.The reaction of Ph2SnCl2 with APLi2 in a nonpolar solvent (hexane or toluene) is accompanied by the additional redox process giving rise to the paramagnetic complex Ph2Sn(ImSQ)Cl (6) (ImSQ is the 4,6-di(tert-butyl)-N-(2,6-diisopropylphenyl)-0-iminobenzoquinone radical anion).The molecular structures of complexes 3 and 6 were established by X-ray diffraction.