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Issue 16, 2018
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Arrested disproportionation in trivalent, mononuclear, and non-metallocene complexes of Zr(iii) and Hf(iii)

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Abstract

Reduction of the group 4 transition metal precursors [(PN)2MCl2] (M = Zr (1), and Hf (2)); PN = (N-(2-(diisopropylphosphino)-4-methylphenyl)-2,4,6-trimethylanilide), both readily prepared by transmetallation of 2 LiPN with [MCl4(THF)2], with a slight excess of KC8, resulted in the isolation of the trivalent complexes [(PN)2MCl] (M = Zr (3), and Hf (4)). Complexes 1–4 were all identified by solid-state X-ray diffraction analysis, whereas in the case of 3 and 4 low temperature X-band EPR spectroscopy allowed for the identification of these metal-centered d1 radicals. A comparison with the isostructural and isoelectronic but more stable [(PN)2TiCl] is also presented.

Graphical abstract: Arrested disproportionation in trivalent, mononuclear, and non-metallocene complexes of Zr(iii) and Hf(iii)

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Article information


Submitted
16 Nov 2017
Accepted
26 Jan 2018
First published
26 Jan 2018

Chem. Commun., 2018,54, 2052-2055
Article type
Communication

Arrested disproportionation in trivalent, mononuclear, and non-metallocene complexes of Zr(III) and Hf(III)

L. N. Grant, M. E. Miehlich, K. Meyer and D. J. Mindiola, Chem. Commun., 2018, 54, 2052
DOI: 10.1039/C7CC08815A

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