title: Unusual reactivity of a disilyne with 4-dimethylaminopyridine: formation of an intramolecularly N-coordinated silylene and its isomerization to a zwitterionic silyl anion.
abstract: Reaction of isolable 1,1,4,4-tetrakis[bis(trimethylsilyl)methyl]-1,4-diisopropyltetrasila-2-yne (1) with an equiv amount of 4-dimethylaminopyridine unexpectedly produced the intramolecularly N-coordinated silylene 2 as the primary product. However, 2 was not thermally stable at room temperature in solution and slowly isomerized to silyl anion 3 with a zwitterionic structure via 1,2-hydrogen migration followed by Si-N bond formation.
authors.affiliation: Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan.
authors.forename: Torahiko
authors.initials: T
authors.lastname: Yamaguchi
authors.forename: Akira
authors.initials: A
authors.lastname: Sekiguchi