Synthesis and structures of new mono- and multi-nuclear benzyltin carboxylates and phosphinates: a novel dibenzyltin phosphinate stabilized by intramolecular hydrogen bonding
Academic Article
Overview
Research
Identity
Additional Document Info
Other
View All
Overview
abstract
The reaction of dibenzyltin dichloride 1 with 2 mol equivalents each of AgO2P(C6H11)2and (C6H11)2PO2H afforded the novel monometallic complex Sn(CH2Ph)2[O2P(C6H11)2]2[HO2P(C6H11)2]22. When 1 was treated with 2 mol equivalents of AgO2P(C6H11)2only the trinuclear O-capped cluster [{Sn(CH2Ph)(OH)[O2P(C6H11)2]}3O]-[O2P(C6H11)2] 4 was obtained by an Sn-C bond cleavage via an intermediate formulated as {Sn(CH2Ph)(OH)-[O2P(C6H11)2]2}23. In the reaction with silver carboxylates the type of product isolated depends on the carboxylic acid used. Thus the 'ladder' {[(PhCH2)SnOO2CMe]2(PhCH2)Sn(O2CMe)3}25, the 'hexagonal prismanes' [(PhCH2)SnOO2CR]6(R = Me 6, But7, C5H4N 8, CH=CMe29 or CHPh210) and the mononuclear compound Sn(CH2Ph)2(O2CCHPh2)211 have been isolated. X-Ray structural analysis confirmed the identities of 2, 4CHCl3, and 52CH2Cl2. In 2 the mononuclear structure is stabilized by internal hydrogen bonding between P-OH and P=O of the co-ordinated phosphinic acid and the phosphinate, respectively, from the same molecule. Compound 4 has a tristannoxane ring with a capping oxygen, whereas in 5 the stannoxane skeleton is that of a 'ladder' with three different types of tin.
