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Conjugate Addition of Acetylides to Complexes of Type > (M=Cr, Mo, or W): Crystal Structure of >formed by the Base-catalysed Isomerization of CPh>>

DOI: 10.1039/DT9880000089

Source and publish data:

Journal of the Chemical Society, Dalton Transactions p. 89 - 92 (1988)

Update date:2022-07-31

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Authors:

Hassan, Fatma S. M.Hassan, Fatma S. M.

Shaw, Bernard L.Shaw, Bernard L.

Thornton-Pett, MarkThornton-Pett, Mark

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Article abstract of DOI:10.1039/DT9880000089

Although treatment of > with Li(C<*>)CPh resulted in no conjugate addition, in the presence of Me2NCH2CH2NMe2 smooth addition occurred to give CPh>> (1c).Similar additions were effected with the corresponding complexes of Cr and other acetylides, Li(C<*>CR) where R=C6H4Me-p, Me, Prn, or Bun, underwent addition.Treatment of CPh>> with KOBut in PriOH gave the dienephosphine comples > (2a); the p-tolylacetylide complex > was also prepared.Crystals of compound (2a) are monoclinic, space group P21/c with a=988.4(3), b=1069.7(2), c=3233.7(4) pm, β=94.73(2) deg, and Z=2; final R=0.0334 and R'=0,0316 for 3929 observed reflexions.Hydrogen-1 and 31P-<1H> n.m.r. and i.r. data are given.

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