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Borinato complexes cobalt

Cyclic voltammetry studies of borabenzene cobalt complexes, (borinato)-cyclopentadienyliron, and bis(borinato) complexes of iron, chromium, and vanadium have appeared. The electrochemical behaviour and e.s.r. spectroscopy of heterocyclic organoboron compounds (60) have been studied. ... [Pg.54]

Alkali metal 1-methyl- and 1-phenyl-borinates are also available from bis(borinato)cobalt complexes (see below) on treatment with sodium or potassium cyanide in an aprotic solvent like acetonitrile. Cobalt cyanide precipitates and the alkali borinate remains in solution. After addition of thallium(I) chloride to some complexes, thallium 1-methyl- or 1-phenyl-borinate could be isolated as pale yellow solids, the only main group borinates isolated hitherto. They are insoluble in most organic solvents but readily soluble in pyridine and DMSO. The solids are stable on treatment with water and aqueous potassium hydride, but are decomposed by acids <78JOM(153)265). [Pg.643]

The first borinate-transition metal complex to be prepared was actually the first known derivative of borin. Bis(cyclopentadienide)cobalt (94) reacts with organic halides and was analogously found to react with boron halides in a redox reaction to give (95), followed by an insertion to yield (cyclopentadienide)(borinato)cobalt (97) (72CB3413). The product composition depends on the ratio of reactants. Compound (97) is the main product (80% yield when R = Ph, X = Br) when the molar ratio between (94) and the boron halide is 2.5 1. A second and slower insertion occurs to give (28) when (97) is treated with another equivalent of the boron halide (Scheme 13). Compounds (28), (29) and (97) have one electron more than predicted by the 187r-electron rule for transition metal complexes. They are red in colour and, of course, paramagnetic. The mixed complexes (97) are thermally labile, in contrast to (28) and (29), which can be heated to 180 °C and sublimed at 90 °C. Their ionization potentials are low and the complexes are sensitive to air. [Pg.644]

G. E. Herberich, W. Koch, and H. Lueken, J. Organometallic Chem., 1978, 160, 17. Bis-(borinato) cobalt ions - a new class of stable 20 electron sandwich complexes. [Pg.82]


See other pages where Borinato complexes cobalt is mentioned: [Pg.316]    [Pg.316]    [Pg.584]    [Pg.645]    [Pg.584]    [Pg.315]    [Pg.317]    [Pg.320]    [Pg.324]    [Pg.645]    [Pg.584]    [Pg.584]    [Pg.83]    [Pg.48]   
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Borinato complexes

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