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Synthesis and Properties of Dialkyl Complexes of Nickel(II). The Crystal Structure of Bis(pyridine)bis(trimethylsilylmethyl)nickel(II)

DOI: 10.1039/DT9810000777

Source and publish data:

Journal of the Chemical Society, Dalton Transactions p. 777 - 782 (1981)

Update date:2022-09-26

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Authors:

Carmona, ErnestoCarmona, Ernesto

Gonzalez, FranciscoGonzalez, Francisco

Poveda, Manuel L.Poveda, Manuel L.

Atwood, Jerry L.Atwood, Jerry L.

Rogers, Robin D.Rogers, Robin D.

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Article abstract of DOI:10.1039/DT9810000777

Dichlorotetrakis(pyridine)nickel(II), (py=pyridine), reacts with trimethylsilylmethylmagnesium chlorid, Mg(CH2SiMe3)Cl, in the presence of excess of pyridine, to yield the unstable dialkyl derivative , for which an X-ray crystal-structure determination shows a cis pyridine configuration with an N-Ni-N angle of 87.5 deg.Interaction of this complex with unidentate (L) or bidentate ligands (L-L) gives or (L= PMe3 or PMe2Ph; L-L= Ph2PCH2PPh2, 2,2'-bipyridyl, 1,10-phenanthroline, or NNN'N'-tetramethylethylenediamine), while PMePh2 and PPh3 cause reductive elimination to .Some neophyl analogues, are also described.Structures for the new compounds are proposed on the basis of i.r., 1H and 31P n.m.r. spectroscopic studies.Complexes (PR3=PMe3 or PMe2Ph) exist in solution as mixtures of cis and trans isomers, but single-crystal X-ray studies (to be reported separately) of show trans phosphines with a P-Ni-P angle of 147 deg.

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