title: Zwitterionic ring-borylated ansa-chromocene complexes.
abstract: Ring borylation of [Me4C2(eta5-C5H4)2CrCO] by B(C6F5)3 affords the zwitterionic complex {Me4(eta5-C5H4)(eta5-C4H3B(C6F5)3)}CrH(CO) (1), the first structurally characterized bent-metallocene complex of Cr(4+). This species decomposes thermally to the zwitterionic species {Me4(eta5-C5H4)(eta5-C4H3B(C6F5)3)}Cr (2) and the ionic species [Me4C2(eta5-C5H4)2CrCO][HB(C6F5)3] (3). The molecular structure of 2 is also described.
authors.affiliation: Department of Chemistry, University of Idaho, Moscow, Idaho 83844-2343.
authors.forename: Piet-Jan
authors.initials: PJ
authors.lastname: Sinnema
authors.forename: Pamela J
authors.initials: PJ
authors.lastname: Shapiro
authors.forename: David Min Jin
authors.initials: DM
authors.lastname: Foo
authors.forename: Brendan
authors.initials: B
authors.lastname: Twamley