Young-Joo Lee, Jong-Dae Lee, Sung-Joon Kim
Jan 3, 2004
Citations
0
Influential Citations
11
Citations
Journal
Organometallics
Abstract
The linear disilanes 1,2-bis(1‘-R-o-carboranyl)-1,1,2,2-tetramethyl-1,2-disilane (R = H (2a), Me (2b), Ph (2c)) were prepared by reacting the lithium salt of 1-R-o-carborane (1) with 1,2-dichlorotetramethyldisilane. These linear disilanes (2) were found to be useful precursors for the synthesis of a variety of cyclic compounds. For instance, reaction of the linear dilithiodisilane 2a with 1,2-dichlorotetramethyldisilane afforded the four-membered cyclic compound 3,4-o-carboranylene-1,1,2,2-tetramethyl-1,2-disilacyclobutane (3). Further, whereas the reaction of linear disilane (2a) with Pt(PEt3)3 was found to yield the cyclic bis(silyl)platinum complex 4, the reaction of the methyl-o-carboranyl-substituted disilane 2b with Pt(PEt3)3 under the same conditions yielded the decomposed bis(silyl)platinum complex 5, formed via oxidative addition of a Si−Si bond at the platinum atom. The reaction of the cyclic disilane 3 using a catalytic amount of lithium metal afforded a five-membered cyclic trisilyl compound (...