Issue 15, 1999

Synthesis and characterisation of 2,6-diisopropylphenylimido complexes of chromium in oxidation states IVVI

Abstract

The chromium(VI) imido complex Cr(NAr)2Cl2 (Ar = 2,6-iPr2C6H3) reacted with pyridine and PMe3 to form the monoadducts Cr(NAr)2Cl2(py) 1 and Cr(NAr)2Cl2(PMe3) 2 respectively. The reaction between Cr(NAr)2Cl2 and LiNHAr afforded the amide complex Cr(NAr)2(NHAr)Cl 3. Attempts to generate the half-sandwich species CrCp(NAr)2Cl through treatment of the dichloride with LiCp, Mg(Cp)2 or NaCp resulted in the dimeric chromium(V) complex [Cr(NAr)(µ-NAr)Cl]2 4. Reduction of Cr(NAr)2Cl2 with magnesium in the presence of PMe3 or PMe2Ph afforded the chromium(IV) bis-phosphine complexes Cr(NAr)2(PMe3)2 5 and Cr(NAr)2(PMe2Ph)2 6 respectively. The reaction between Cr(NAr)2(PMe3)2 and phenyldiazomethane gave the diazoalkane complex Cr(NAr)2(N2CHPh)(PMe3) 7. Complexes 1, 3, 4 and 7 have been structurally characterised.

Supplementary files

Article information

Article type
Paper

J. Chem. Soc., Dalton Trans., 1999, 2633-2640

Synthesis and characterisation of 2,6-diisopropylphenylimido complexes of chromium in oxidation states IVVI

K. Chin Chew, W. Clegg, M. P. Coles, M. R. J. Elsegood, V. C. Gibson, A. J. P. White and D. J. Williams, J. Chem. Soc., Dalton Trans., 1999, 2633 DOI: 10.1039/A901790I

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