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Synthesis and Characterisation of 2,6-Diisopropylphenylimido Complexes of Chromium in Oxidation States IV - VI

journal contribution
posted on 2023-06-08, 00:00 authored by William Clegg, Kong Chin Chew, Martyn P Coles, Mark R J Elsegood, Vernon C Gibson, Andrew J P White, David J Williams
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.

History

Publication status

  • Published

Journal

Journal of the Chemical Society, Dalton Transactions

ISSN

0300-9246

Issue

15

Volume

-

Page range

2633 - 2639

Department affiliated with

  • Chemistry Publications

Notes

PhD work

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2012-02-06

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