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

Journal Article · · ChemComm
DOI:https://doi.org/10.1039/c7cc08815a· OSTI ID:1843641
 [1];  [2];  [2];  [3]
  1. Univ. of Pennsylvania, Philadelphia, PA (United States); Program Manager, Catalysis Science Office of Basic Energy Sciences U.S. Department of Energy
  2. Friedrich-Alexander Univ. Erlangen-Nürnberg (FAU) (Germany)
  3. Univ. of Pennsylvania, Philadelphia, PA (United States)
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. Here, a comparison with the isostructural and isoelectronic but more stable [(PN)2TiCl] is also presented.
Research Organization:
Univ. of Pennsylvania, Philadelphia, PA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
DOE Contract Number:
SC0012486
OSTI ID:
1843641
Journal Information:
ChemComm, Journal Name: ChemComm Journal Issue: 16 Vol. 54; ISSN 1359-7345
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English

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