title: Synthesis and characterization of tricarbastannatranes and their reactivity in B(C6F5)3-promoted conjugate additions.
abstract: The synthesis and characterization of a series of tricarbastannatranes, in the solid state and in solution, are described. The structures of the complexes [N(CH2 CH2 CH2 )3 Sn](BF4 ), [N(CH2 CH2 CH2 )3 Sn](SbF6 ), [N(CH2 CH2 CH2 )3 Sn]4 [(SbF6 )3 Cl], and [(N(CH2 CH2 CH2 )3 Sn)2 OH][MeB(C6 F5 )3 ] were determined by X-ray crystallography. Furthermore, the B(C6 F5 )3 -promoted conjugate addition of alkyl-tricarbastannatranes to benzylidene derivatives of Meldrum's acid was investigated, and detailed mechanistic studies are presented.
authors.affiliation: Department of Chemistry, University of Waterloo, 200 University Ave W, Waterloo, ON N2L 3G1 (Canada).
authors.forename: Azadeh
authors.initials: A
authors.lastname: Kavoosi
authors.forename: Eric
authors.initials: E
authors.lastname: Fillion
keywords: Lewis acid; Michael addition; boron; reaction mechanisms; tin