Reactions of organotin chlorides R2SnCl2 (R = Et, But, or Ph) with lithium 4,6-di( tert -butyl)- N -(2,6-diisopropylphenyl)- o -amidophenolate. Synthesis and structures of tin( IV ) o -iminoquinone complexes

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 = Bu^t, Ph)) tin(IV) 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)-o-iminobenzoquinone radical anion). The molecular structures of complexes 3 and 6 were established by X-ray diffraction. Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 2, pp. 253–258, February, 2007.