72509-69-4Relevant academic research and scientific papers
Coordination complexes of tetrakis(trifluoroacetato)dimolybdenum. A solution 1H, 19F, and 31P nuclear magnetic resonance and infrared spectroscopic study
Girolami, Gregory S.,Mainz, Vera V.,Andersen, Richard A.
, p. 805 - 810 (2008/10/08)
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, (t-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 31P{1H} NMR spectroscopy of these phosphine adducts indicates that they are extensively dissociated in CDCl3. Class II complexes (L = Me3P, Me2PhP, or Et3P) exist in solution (CDCl3) 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.
