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Phospha(III)guanidinate complexes of titanium(IV) and zirconium(IV) aminides

journal contribution
posted on 2023-06-07, 19:45 authored by Natalie E Mansfield, Joanna Grundy, Martyn )P Coles, Peter B Hitchcock
Two procedures for the synthesis of group 4 phosphaguanidine compounds M(R2PC{NR'}(2))(NR ''(2))(3) (M = Ti, Zr: R = Ph, Cy; R' = 'Pr, Cy: R '' = Me, Et) are described. Spectroscopic characterization indicated symmetrical bonding of the phosphaguanidinate ligand in solution for the P-diphenyl derivatives whereas the P-dicyclohexyl analogs adopt a more rigid geometry with inequivalent N-amidine substituents within the phosphaguanidinate ligand. X-ray diffraction studies show exclusively monomeric tbp metal centers for a series of derivatives, with a chelating hosphaguanidinate ligand that spans an axial and an equatorial position. Two different conformers have been identified in the solid-state that differ in the relative orientation of the phosphorus R2P-C substituents with respect to the equatorial plane of the tbp metal. The synthetic protocol was extended to the bimetallic complex, [PhP(C{(NIPr)-I-i)(2)Ti{NMe2)(3))CH2-](2), which was characterized by crystallography as the meso-form.

History

Publication status

  • Published

Journal

Polyhedron

ISSN

0277-5387

Publisher

Elsevier

Issue

12

Volume

29

Department affiliated with

  • Chemistry Publications

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2012-02-06

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