title: First synthesis of the three isomeric parent disilacyclohexanes. An improved preparation of methylene di-Grignard.
abstract: Ring closure of 1,5-dibromo-1,5-disilapentane with methylene di-Grignard was the key step in the preparation of the parent 1,3-disilacyclohexane. For that purpose, the preparation of methylene di-Grignard has been improved and simplified. The successful synthesis of the isomeric 1,2- and 1,4-disilacyclohexanes is also reported.
authors.affiliation: Science Institute, University of Iceland, Dunhaga 3, IS-107 Reykjavik, Iceland.
authors.forename: Palmar I
authors.initials: PI
authors.lastname: Gudnason
authors.forename: Ingvar
authors.initials: I
authors.lastname: Arnason