dc.contributor.authorKuan, Seah Ling
dc.contributor.authorLeong, Weng Kee
dc.contributor.authorWebster, Richard David
dc.contributor.authorGoh, Lai Yoong
dc.identifier.citationKuan, S. L., Leong, W. K., Webster, R. D., & Goh, L. Y. (2011). Mixed-Sandwich Cp*Cr Complexes Containing Poly(methimazolyl)borates (Cp* = C5Me5): Syntheses and Structural and Electrochemical Studies. Organometallics, 31(1), 273–281.
dc.description.abstractReaction of the scorpionate salts K[HB(mt)3], Na[H2B(mt)2], and Li[HB(mt)2(pz)] with [Cp*CrBr2]2 (1) gave the 15-electron Cr(III) complexes [Cp*Cr{κ3-S,S′,S″-HB(mt)3}]Br (2), [Cp*Cr{κ2-S,S′-H2B(mt)2}Br] (3), and [Cp*Cr{κ2-S,S′-HB(mt)2(pz)}Br] (4) in moderate to high yields. These are the first examples of mixed-sandwich chromium(III) complexes containing poly(methimazolylborate) ligands. The tridentate coordination of the monoanionic ligands [H2B(mt)2] in 3 and [HB(mt)2(pz)] in 4 can be effected by using a silver salt to remove the Br coligand, thus yielding the complexes [Cp*Cr{κ3-H,S,S′-H2B(mt)2}]PF6 (6) and [Cp*Cr{κ3-N,S,S′-HB(mt)2(pz)}]PF6 (7). It was also found that, in the presence of acetonitrile, the reaction of 3 with AgPF6 afforded [Cp*Cr{κ2-S,S′-H2B(mt)2}(NCMe)]PF6 (5). The coordination geometries of all the complexes have been determined by X-ray diffraction analyses. Cyclic voltammetric studies of complexes 2, 4, and 7 showed that the oxidation and reduction processes are chemically reversible and that the reduced and oxidized states of complexes 3, 5, and 6 are very short-lived.en_US
dc.rights© 2011 American Chemical Society. This is the author created version of a work that has been peer reviewed and accepted for publication by Organometallics, American Chemical Society. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1021/om2008666].
dc.titleMixed-sandwich Cp*Cr complexes containing poly(methimazolyl)borates (Cp* = C5Me5) : syntheses and structural and electrochemical studiesen_US
dc.typeJournal Article
dc.contributor.schoolSchool of Physical and Mathematical Sciencesen_US
dc.description.versionAccepted version

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