η1:η2-P-pyrazolylphosphaalkene complexes of Ruthenium(0)

Greenacre, Victoria K and Crossley, Ian R (2016) η1:η2-P-pyrazolylphosphaalkene complexes of Ruthenium(0). Inorganics, 4 (4). p. 30. ISSN 2304-6740

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Abstract

An extended range of novel ruthenium phosphaalkene complexes of the type[Ru{η1-N:η2-P,C-P(pz0)=CH(SiMe2R)}(CO)(PPh3)2] (R = Tol, C6H4CF3-p; pz0 = pzMe2, pzCF3, pzMe,CF3; R = Me, C6H4CF3-p; pz0 = pzPh) have been prepared from the respective ruthenaphosphaalkenyls [Ru{P=CH(SiMe2R)}Cl(CO)(PPh3)2] upon treatment with Lipz0. Where R = C6H4CF3-p and pz0 = pzMe2 the complex is characterized by single crystal X-ray diffraction, only the second example of such species being structurally characterized. This indicates enhanced pyramidalisation of the alkenic carbon center when compared with precedent data (R = Me, pz0 = pz) implying an enhanced Ru→π*PC contribution, which can be correlated with the greater donor power of pzMe2. This is similarly reflected in spectroscopic data that reveal significant influence of the pyrazolyl substituents upon the phosphaalkene, stronger donors imparting significantly enhanced shielding to phosphorus; in contrast, a much lesser influence if noted for the silyl substituents.

Item Type: Article
Schools and Departments: School of Life Sciences > Chemistry
Subjects: Q Science > QD Chemistry > QD0146 Inorganic chemistry
Depositing User: Ian Crossley
Date Deposited: 03 Oct 2016 14:01
Last Modified: 06 Mar 2017 16:22
URI: http://sro.sussex.ac.uk/id/eprint/63764

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Project NameSussex Project NumberFunderFunder Ref
Polymetallaphosphacarbons: Toward phosphorus-doped organometallic molecular wiresG1182ROYAL SOCIETYUF120021