title: Electrical or photocontrol of the rotary motion of a metallacarborane.
abstract: Rotary motion around a molecular axis has been controlled by simple electron transfer processes and by photoexcitation. The basis of the motion is intramolecular rotation of a carborane cage ligand (7,8-dicarbollide) around a nickel axle. The Ni(III) metallacarborane structure is a transoid sandwich with two pairs of carbon vertices reflected through a center of symmetry, but that of the Ni(IV) species is cisoid. The interconversion of the two provides the basis for controlled, rotational, oscillatory motion. The energies of the Ni(III) and Ni(IV) species are calculated as a function of the rotation angle.
authors.affiliation: Department of Chemistry and Biochemistry, University of California, Los Angeles, CA, 90095-1569, USA. mfh@chem.ucla.edu
authors.forename: M Frederick
authors.initials: MF
authors.lastname: Hawthorne
authors.forename: Jeffrey I
authors.initials: JI
authors.lastname: Zink
authors.forename: Johnny M
authors.initials: JM
authors.lastname: Skelton
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Bayer
authors.forename: Chris
authors.initials: C
authors.lastname: Liu
authors.forename: Ester
authors.initials: E
authors.lastname: Livshits
authors.forename: Roi
authors.initials: R
authors.lastname: Baer
authors.forename: Daniel
authors.initials: D
authors.lastname: Neuhauser