Conversion of Ctriple bondC to CO in alkynyl-metal complexes: oxidation of carbon chains capped by carbon-tricobalt clusters.
Summary of "Conversion of Ctriple bondC to CO in alkynyl-metal complexes: oxidation of carbon chains capped by carbon-tricobalt clusters."
Treatment of Co(3)(mu(3)-CC[triple bond]CR)(mu-dppm)(CO)(7) with O(2) (air) in the presence of [FcH]PF(6) afforded Co(3){mu(3)-CC(O)R}(mu-dppm)(CO)(7) by the formal conversion -C[triple bond]C- + O-O --> >C-O + C[triple bond]O. In this way, complexes with R = Ph, Fc, and W(CO)(3)Cp, bis-clusters {Co(3)(mu-dppm)(CO)(7)}(2){mu(3):mu(3)-[[triple bond]C(O)(C[triple bond]C)C[triple bond]]}, {Co(3)(mu-dppm)(CO)(7)}(2){mu(3):mu(3)-[[triple bond]C(O)(C[triple bond]C)(x)C(O)C[triple bond, length as m-dash]]} (x = 1, 2), and {Co(3)(mu-dppm)(CO)(7)}(2){mu(3):mu(3)-[[triple bond]CC(O)C[triple bond, length as m-dash]CC(6)H(4)C[triple bond]CC(O)C[triple bond]]}, and heterometallic bis-clusters {Co(3)(mu-dppm)(CO)(7)}{mu(3):mu(3)-[[triple bond]CC(O)C[triple bond]CC[triple bond]]}{M(3)(mu-H)(3)(CO)(9)} (M = Ru, Os) have been prepared. Single-crystal XRD structure determinations of several products are reported together with that of precursor {Co(3)(mu-dppm)(CO)(7)}(2){mu(3):mu(3)-[[triple bond]C(C[triple bond]C)(2)C(6)H(4)(C[triple bond]C)(2)C[triple bond]]}.
Affiliation
School of Chemistry & Physics, University of Adelaide, Adelaide, South Australia5005. michael.bruce@adelaide.edu.au
Journal Details
This article was published in the following journal.
Name: Dalton transactions (Cambridge, England : 2003)
ISSN: 1477-9234
Pages: 8801-11
Links
- PubMed Source: http://www.ncbi.nlm.nih.gov/pubmed/20714481
- DOI: http://dx.doi.org/10.1039/c002997c
Medical and Biotech [MESH] Definitions
Coordination Complexes
Neutral or negatively charged ligands bonded to metal cations or neutral atoms. The number of ligand atoms to which the metal center is directly bonded is the metal cation's coordination number, and this number is always greater than the regular valence or oxidation number of the metal. A coordination complex can be negative, neutral, or positively charged.
Carbon-carbon Lyases
Enzymes that catalyze the cleavage of a carbon-carbon bond by means other than hydrolysis or oxidation. This subclass contains the DECARBOXYLASES, the ALDEHYDE-LYASES, and the OXO-ACID-LYASES. EC 4.1.
Acids, Noncarboxylic
Inorganic acids with a non metal, other than carbon, attached to hydrogen, or an acid radical containing no carbon.
Carbon-sulfur Lyases
Enzymes that catalyze the cleavage of a carbon-sulfur bond by means other than hydrolysis or oxidation. EC 4.4.
Carbon-oxygen Lyases
Enzymes that catalyze the cleavage of a carbon-oxygen bond by means other than hydrolysis or oxidation. EC 4.2.
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