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Chelate complexes from diphosphine substitution in pentakis(arylisocyanide)cobalt(I) complexes

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Four chelate complexes, [Co(CNC6H3iPr2-2,6)3P(C6H4Me-p)2CH2CH2P(C6H4Me-p)2]BF4, [Co(CNC6H3iPr2-2,6)3PPh2CH=CHPPh2-cis]BF4, [Co(CNC6H3iPr2-2,6)3PPh2C6H4PPh2-o]BF4, and [Co(CNC6H3iPr2-2,6)3P(C6H4CF3-p)2CH2CH2P(C6H4CF3-p)2]BF4, have been synthesized by substitution reactions of [Co(CNC6H3iPr2-2,6)5]BF4 at elevated temperatures and/or prolonged reaction times. The complexes have been characterized by IR and electronic spectra, 31P NMR, cyclic voltammetry, and mass spectrometry. Comparisons are made with the pentakis(arylisocyanide)cobalt(I) complexes mono-substituted with diphosphine ligands.
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Keywords: 31P-NMR; Arylisocyanide; Cobalt(I) complex; Cyclic voltammetry; Diphosphine

Document Type: Research Article

Affiliations: Department of Chemistry, University of Botswana, Gaborone, Botswana

Publication date: January 1, 2007

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