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

作者：Grant Lauren N; Miehlich Matthias E; Meyer Karsten; Mindiola Daniel J^*

来源：Chemical communications, 2018, 54(16): 2052-2055.

DOI：10.1039/c7cc08815a

Reduction of the group 4 transition metal precursors [(PN)(2)MCl2] (M = Zr (1), and Hf (2)); PN similar to = (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)(2)MCl] (M = Zr (3), and Hf (4)). Complexes 1-4 were all identified by solidstate 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)(2)TiCl] is also presented.

• 出版日期2018-2-25