title: A quadruply-bonded [Cr2(guanidinate)4]4- tetraanion.
abstract: The reaction of chromocene, Cp(2)Cr, with dilithiated 2,3-diphenylguanidine [(PhNH)(2)C=NH = L(2)H(3)] gives the novel, quadruply-bonded tetraanion [Cr(2)(L(2)H)(4)](4-).
authors.affiliation: Chemistry Department, Cambridge University, Lensfield Road, Cambridge, UK CB2 1EW.
authors.forename: Joanna
authors.initials: J
authors.lastname: Haywood
authors.forename: Francesca A
authors.initials: FA
authors.lastname: Stokes
authors.forename: Robert J
authors.initials: RJ
authors.lastname: Less
authors.forename: Mary
authors.initials: M
authors.lastname: McPartlin
authors.forename: Andrew E H
authors.initials: AE
authors.lastname: Wheatley
authors.forename: Dominic S
authors.initials: DS
authors.lastname: Wright