Coordination Complexes of Tetrakis(trifluoroacetato)dimolybdenum. A Solution 1H, 19F, and 31P Nuclear Magnetic Resonance and Infrared Spectroscopic Study

Gregory S. Girolami, Vera V. Mainz, Richard A. Andersen

Research output: Contribution to journalArticlepeer-review

Abstract

New coordination complexes of the type Mo2(O2CCF3)4(L)2 where L is Me3P, Me2PhP, MePh2P, Ph3P, Et3P, (c-Hx)3P (c-Hx = cyclohexyl), (t-Bu)3P, (Me3Si)3P, Me3PO, and quinuclidine have been prepared. These complexes fall into two classes, viz., class I or class II. Class I complexes are formed with MePh2P, Ph3P, (c-Hx)3P, (f-Bu)3P, (Me3Si)3P, Me3PO, and quinuclidine. Solution infrared and 19F NMR studies show that these complexes are of the classical type (axial coordination) as shown by X-ray crystallography for L = pyridine, some years ago. Solution 3IP{1H} NMR spectroscopy of these phosphine adducts indicates that they are extensively dissociated in CDC13. Class II complexes (L = Me3P, Me2PhP, or Et3P) exist in solution (CDC13) with bidentate and monodentate trifluoroacetate groups as determined by infrared and 19F NMR spectroscopy. At least two isomers are present as shown by 31P{1H} and 1H{31P} NMR spectroscopy. Some bidentate phosphine complexes are also described.

Original languageEnglish (US)
Pages (from-to)802-805
Number of pages4
JournalInorganic Chemistry
Volume19
Issue number4
DOIs
StatePublished - Jan 1 1980
Externally publishedYes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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