1,2-Dibromodisilenes: a rich source for titanium silylidyne complexes, acyclic silylenes and disilyne dianions

The objective of this thesis was the systematic analysis of the reactivity of the 1,2-dibromodisilene (E)-(Eind) (Br)Si=Si(Br)(Eind) (1, Eind = 1,1,3,3,5,5,7,7-octaethyl-shydrindacene-4-yl). The initial focus was on the possible usage of the starting material as precursor for the synthesis of transition metal silylidyne complexes. Furthermore, a new synthetic approach to acyclic silylenes could be established starting from 1. Three examples of this class of compounds, one amino-(8-N), one phosphino- (8-P) as well as one oxosilylene (8-O) could be generated and fully characterized, yielding interesting insights into the effects of the different substitution patterns on the electronic structures of the molecules. Reactivity studies of the acyclic aminosilylene resulted, upon two-electron-reduction, in the formation of the unprecedented disilyne dianion (12), the first example of an NHC-free disilicon(0) compound (NHC = N-heterocyclic carbene).