title: Synthesis and reactivity of 1,2-bis(chlorodimethylgermyl)carborane and 1,2-bis(bromodimethylstannyl)carborane.
abstract: The 1,2-bis(chlorogermyl)- (1) and 1,2-bis(bromostannyl)carborane (2) have been prepared by the reaction of dilithio-o-carborane with Me(2)GeCl(2) and Me(2)SnBr(2), respectively. Compounds 1 and 2 are found to be good precursors for the synthesis of a variety of cyclization compounds. The Wurtz-type coupling reaction of 1 and 2 using sodium metal afforded the four-membered digerma compound 3 and five-membered tristanna compound 4, respectively. The salt elimination reactions of 1 and 2 using Li(2)N(t)Bu and Li(2)PC(6)H(5) afforded the cyclic products [structure: see text]. The 1,2-bis(dimethylgermyl)carborane 9 and 1,2-bis(dimethylstannyl)carborane 10 were prepared by the reaction of 1 and 2 with sodium cyanoborohydride. The reactions of 9 and 10 with Pd(PPh(3))(4) afforded the bis(germyl)palladium 12 and bis(stannyl)palladium 13 complexes, respectively.
authors.affiliation: Department of Chemistry, Korea University, Chochiwon, Chungnam 339-700, Korea.
authors.forename: Chongchan
authors.initials: C
authors.lastname: Lee
authors.forename: Junghyun
authors.initials: J
authors.lastname: Lee
authors.forename: Soon W
authors.initials: SW
authors.lastname: Lee
authors.forename: Sang Ook
authors.initials: SO
authors.lastname: Kang
authors.forename: Jaejung
authors.initials: J
authors.lastname: Ko