Synthesis, Characterization, and Chemistry of Pentacarbonylnitrosylvanadium, V(CO)5NO, a Remarkably Reactive Relative of Hexacarbonylchromium

Kristi Lenz Fjare, John E Ellis

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Thermally unstable, deep red-violet, and remarkably reactive V(CO)5NO has been prepared in high yields by the reaction of equimolar amounts of [Et4N] [V(CO)6] and [NO] [BF4] in methylene Chloride at -40 °C. Also, V(CO)5NO has been isolated and characterized for the first time by mass spectra and derivative chemistry. This volatile material undergoes Substitution reactions with a large variety of neutral and anionic bases at -30 to 0°C to provide 42-95% yields of new products. These include [V(CO)4NO(Ph2PCH2)]2, V(CO)4(NO)(PMe3), thermally unstable V(CO)4(NO)(NMe3), [Et4N] [V(CO)4(NO)I], [Ph4As] [(CO)5MnV(CO)4NO], which contains a Mn-V bond, and [Et4N] [C5H5V(CO)2NO]. The last substance is the first example of a carbonylnitrosylcyclopentadienylmetalate ion and the final member of the isoelectronic series C5H5V(NO)3-x(CO)x1-x (x = 0-3) to be prepared. Attempts to synthesize Ta(CO)5NO and derivatives thereof are also described.

Original languageEnglish (US)
Pages (from-to)2303-2307
Number of pages5
JournalJournal of the American Chemical Society
Issue number8
StatePublished - Mar 1983


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