Study on Transition Metal Complexes and Low-Coordinate Boron Species Ligated by Alkylsilylenes

概要

Silylenes, silicon analogues of carbene, are important intermediates in silicon
chemistry and are generally singlet in the ground state in contrast to carbenes being
singlet/triplet in the ground state (Chart 1-1a).[1] Although silylenes are intrinsically susceptible
to auto-oligomerization, these species can be isolated by introducing of -donating substituents
like amino groups and/or bulky substituents on the divalent silicon atom (Chart 1-1b).[1,2]
Silylenes were often used as ligands for transition metal complexes[3] and low-coordinate main
group element compounds,[4] because silylenes have a lone pair orbital and a vacant 3p orbital
on the silicon atom. Several transition metal complexes and low-coordinate main group element
compounds coordinated by isolable silylene have been synthesized and their structure and
reactivity have been extensively explored.
Chart 1-1. ...

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