Summary
The bisacetonitrile complexes [MI2(CO)3(NCMe)2] react with an equimolar amount of L in CH2Cl2 at room temperature to give [MI2(CO)3(NCMe)L] which when mixedin situ with an equimolar amount of [NBu n4 ]X affords the anionic seven-coordinate compounds [NBu n4 ][MI2X(CO)3L][M=Mo or W,X=I, L=PPh3 (for M=W only), AsPh3 or SbPh3 (for M=Mo only); M=Mo and W, X=Br3 or Br2I, L=PPh3, AsPh3 or SbPh3]. These reactions are likely to occurvia the stepwise dissociative displacement of two acetonitrile ligands. Low-temperature (−70° C, CD2Cl2)13C n.m.r. spectra (C≡O resonances) are reported for several of the complexes in order to infer the likely stereochemistry of these compounds.
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Baker, P.K., Fraser, S.G. New synthesis and low temperature13C n.m.r. spectra of some anionic seven-coordinate complexes of molybdenum(II) and tungsten(II) of the type [NBu n4 ][MI2X(CO)3L]. Transition Met Chem 13, 284–286 (1988). https://doi.org/10.1007/BF01025675
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DOI: https://doi.org/10.1007/BF01025675