Spectroscopic evidence for hemilabile behavior in a β-ketophosphonate complex of molybdenum(VI)

Article abstract of DOI:10.1080/00945719809351664

The β-ketophosphonate complexes dichlorodioxo(diethyl(2-phenyl-2-oxoethyl)phosphonate)molybdenum(VI) (5a) and dichlorodioxo(triethylphosphonoacetate)molybdenum (VI) (5b) have been synthesized in 61-80% yield and characterized by NMR and IR spectroscopies. The crystal structure of (5a) (orthorhombic, 2₁2₁2₁, a = 8.0909 (5) A, b = 14.1432 (5) A, c = 14.9749 (8) A, Z = 4) shows that the β-ketophosphonate ligand is coordinated to the molybdenum atom in a bidentate binding mode. In solution, compound (5a) displays hemilabile behavior as revealed by an IR spectrum recorded in CH₃CN. Reaction of (5a) with diphenylsulfoxide (DPSO) in CH₂Cl₂ results in complete displacement of the β-ketophosphonate ligand and formation of dichlorodioxobis(diphenylsulfoxide)-molybdenum(VI) (8) in 96% yield.

Full text of DOI:10.1080/00945719809351664

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Synthesis and Reactivity in
Inorganic and Metal-Organic
Chemistry
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Spectroscopic Evidence for
Hemilabile Behavior in a β-
Ketophosphonate Complex of
Molybdenum(VI)
M. Miggins a , James C. Fettinger b , M. Quamrul
Islam a & D. Andrew Knight a
a Department of Chemistry , The George Washington
University , 725 21st Street N. W., Washington,
District of Columbia, 20052
b Department of Chemistry and Biochemistry ,
University of Maryland , College Park, Maryland,
20742
Published online: 23 Apr 2008.
To cite this article: M. Miggins , James C. Fettinger , M. Quamrul Islam & D. Andrew
Knight (1998) Spectroscopic Evidence for Hemilabile Behavior in a β-Ketophosphonate
Complex of Molybdenum(VI), Synthesis and Reactivity in Inorganic and Metal-Organic
Chemistry, 28:4, 543-553, DOI: 10.1080/00945719809351664
To link to this article: http://dx.doi.org/10.1080/00945719809351664
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