Abstract
A number of new tetracarbonyl diketonate anions of the Group VI transition metals have been synthesized by two separate routes. The most versatile preparation is by the reaction of a thallium(I) salt of a β-diketone with the metal pentacarbonyl halide anions. The infrared spectra of these anions have been studied in some detail and a number of interesting trends and observed when the Cotton-Kraihanzel force constants are compared. The [Mo[CO) 4(Diket)] − anions will undergo oxidative elimination reactions with allyl chlorides and dimethyltin dichloride and simple substitution reactions with some Lewis bases.
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