Reaktionen mit primären Stannylphosphinen: Synthese offenkettiger und ring-oligomerer Zinn-Phosphorverbindungen

Abstract Metathetical reactions of P-lithio salts of sterically crowded primary stannylphosphines t Bu 3 SnPH 2 and t Bu 2 Sn(PH 2 ) 2 with organochlorosilanes and -stannanes were investigated. Reactions of t Bu 3 SnPHL ( I ) with dichlorides R 2 ECl 2 or (R 2 CnCl) 2 PH yield the secondary stannylphosphines ( t Bu 3 SnPH) 2 ER 2 ( III :ESi, RMe; IV : ESn, R t Bu) and ( t Bu 3 SnPHSn t Bu 2 ) 2 PH ( V ), respectively. In the corresponding reaction of I with Me 2 SnCl 2 , the cyclic tertiary stannylphosphine (Me 2 SnPSn t Bu 3 ) 2 ( VI ) is formed by condensation of t Bu 3 SnPH 2 . Cyclocondensations yielding tertiary stannylphosphines also occur in the salt reactions of chlorostannanes or -silanes with the dilithio compound t Bu 2 Sn(PHLi) 2 ( II ). With Me 3 SnCl, the P,P′-bis(stannyl)-subst. diphosphadistannetane ( t Bu 2 SnPSnMe 3 ) 2 ( VII ) is obtained. Me 3 SiCl reacts to give the homologous P,P′-bis(silyl) derivative ( t Bu 2 SnPSiMe 3 ) 2 ( VIII ). Some properties of these new compounds are reported.