cis- and trans-Influences in platinum(II) complexes. X-Ray crystal-structure analysis of cis-dichloro(triethylphosphine)(trifluorophosphine)platinum(II)
- 1 January 1977
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 20,p. 2043-2048
- https://doi.org/10.1039/dt9770002043
Abstract
Crystals of cis-[PtCl2(PEt3)(PF3)] are monoclinic, P21/n, with a= 11.813(6), b= 17.27(6), c= 6.67(3)Å, β= 91.29(2)°, and Z= 4. Least-squares refinement based on 1 957 reflection intensities has converged at R= 0.038. The co-ordination at platinum is approximately square planar with angle P–Pt–P 101.3(1)° and bond lengths Pt–PEt3 2.272(3), Pt–PF3 2.141(3), Pt–Cl 2.357(3)(trans to PEt3), and 2.305(3)Å(trans to PF3). The shorter Pt–P bond to PF3 is at least partly due to the effect of electronegative substituents on the phosphorus lone-pair orbital, and the difference in the Pt–Cl lengths can be accounted for by changes in the σ orbitals of the complex. Correlations are noted between the lengths of mutually trans Pt–PX3 and Pt–Cl bonds and between the lengths of mutually trans Pt–PEt3 and Pt–Cl bonds in complexes cis-[PtCl2L(PEt3)].Keywords
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