Biphenolate phosphine complexes of group 4 metals

Lan Chang Liang; Yu Ning Chang; Man Lee Hon

doi:10.1021/ic062314e

Biphenolate phosphine complexes of group 4 metals

Lan Chang Liang, Yu Ning Chang, Man Lee Hon

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

23 Citations (Scopus)

Abstract

The preparation and structural characterization of a series of group 4 complexes supported by 2,2′-phenylphosphinobis(4,6-di-tert-butylphenolate) ([OPO]^2-) are described. The reaction of either H₂[OPO] with Ti(OR)₄ (R = Et, ⁱPr) or Li₂[OPO] with TiCl₄(THF)₂ produced yellowish-orange crystals of Ti[OPO]₂, regardless of the stoichiometry of the starting materials employed. Comproportionation of the bis-ligand complex Ti[OPO]₂ with 1 equiv of TiCl₄(THF)₂ led to the formation of [OPO]TiCl₂(THF) as brownish-red crystals. Surprisingly, treatment of H₂[OPO] with [(Me₃Si)₂N]₂MCl ₂ (M = Zr, Hf), irrespective of the molar ratio, generated colorless crystals of the corresponding bis-ligand complex [OPO]₂M(OH ₂) as an aqua adduct. The solution and solid-state structures of these group 4 complexes were all characterized by multinuclear NMR spectroscopy and X-ray crystallography, respectively.

Original language	English
Pages (from-to)	2666-2673
Number of pages	8
Journal	Inorganic Chemistry
Volume	46
Issue number	7
DOIs	https://doi.org/10.1021/ic062314e
Publication status	Published - 2007 Apr 2

All Science Journal Classification (ASJC) codes

Physical and Theoretical Chemistry
Inorganic Chemistry

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title = "Biphenolate phosphine complexes of group 4 metals",

abstract = "The preparation and structural characterization of a series of group 4 complexes supported by 2,2′-phenylphosphinobis(4,6-di-tert-butylphenolate) ([OPO]2-) are described. The reaction of either H2[OPO] with Ti(OR)4 (R = Et, iPr) or Li2[OPO] with TiCl4(THF)2 produced yellowish-orange crystals of Ti[OPO]2, regardless of the stoichiometry of the starting materials employed. Comproportionation of the bis-ligand complex Ti[OPO]2 with 1 equiv of TiCl4(THF)2 led to the formation of [OPO]TiCl2(THF) as brownish-red crystals. Surprisingly, treatment of H2[OPO] with [(Me3Si)2N]2MCl 2 (M = Zr, Hf), irrespective of the molar ratio, generated colorless crystals of the corresponding bis-ligand complex [OPO]2M(OH 2) as an aqua adduct. The solution and solid-state structures of these group 4 complexes were all characterized by multinuclear NMR spectroscopy and X-ray crystallography, respectively.",

author = "Liang, {Lan Chang} and Chang, {Yu Ning} and Hon, {Man Lee}",

year = "2007",

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T1 - Biphenolate phosphine complexes of group 4 metals

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AU - Chang, Yu Ning

AU - Hon, Man Lee

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N2 - The preparation and structural characterization of a series of group 4 complexes supported by 2,2′-phenylphosphinobis(4,6-di-tert-butylphenolate) ([OPO]2-) are described. The reaction of either H2[OPO] with Ti(OR)4 (R = Et, iPr) or Li2[OPO] with TiCl4(THF)2 produced yellowish-orange crystals of Ti[OPO]2, regardless of the stoichiometry of the starting materials employed. Comproportionation of the bis-ligand complex Ti[OPO]2 with 1 equiv of TiCl4(THF)2 led to the formation of [OPO]TiCl2(THF) as brownish-red crystals. Surprisingly, treatment of H2[OPO] with [(Me3Si)2N]2MCl 2 (M = Zr, Hf), irrespective of the molar ratio, generated colorless crystals of the corresponding bis-ligand complex [OPO]2M(OH 2) as an aqua adduct. The solution and solid-state structures of these group 4 complexes were all characterized by multinuclear NMR spectroscopy and X-ray crystallography, respectively.

AB - The preparation and structural characterization of a series of group 4 complexes supported by 2,2′-phenylphosphinobis(4,6-di-tert-butylphenolate) ([OPO]2-) are described. The reaction of either H2[OPO] with Ti(OR)4 (R = Et, iPr) or Li2[OPO] with TiCl4(THF)2 produced yellowish-orange crystals of Ti[OPO]2, regardless of the stoichiometry of the starting materials employed. Comproportionation of the bis-ligand complex Ti[OPO]2 with 1 equiv of TiCl4(THF)2 led to the formation of [OPO]TiCl2(THF) as brownish-red crystals. Surprisingly, treatment of H2[OPO] with [(Me3Si)2N]2MCl 2 (M = Zr, Hf), irrespective of the molar ratio, generated colorless crystals of the corresponding bis-ligand complex [OPO]2M(OH 2) as an aqua adduct. The solution and solid-state structures of these group 4 complexes were all characterized by multinuclear NMR spectroscopy and X-ray crystallography, respectively.

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