Addition reactions on co-ordinated olefinic ligands. Part 8. Platinum(II) complexes of 1,1 -dimethylallene and their reaction with amines. Molecular structure of the zwitterionic derivative dichloro-[1-(NN-diethylammoniomethyl)-2-methylprop-1-enyl](triphenylphosphine) platinum(II)
- 1 January 1978
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 10,p. 1392-1397
- https://doi.org/10.1039/dt9780001392
Abstract
Some new platinum(II) complexes of 1,1-dimethylallene (dma) of general formula cis-[PtCl2(dma)L](L = PPh3, AsPh3, H2NC6H4Me-p, or SMe2O) have been prepared. They react with aliphatic and aromatic amines to give zwitterionic alkenyl derivatives of the type cis-[PtCl2(Me2CCCH2NR1R2R3) L], which on treatment with hydrogen chloride afford the ammonium salts [NR1R2R3(CH2CHCMe2)]Cl. The structure of the alkenyl complexes has been confirmed by X-ray diffraction analysis in the case of the title complex. Crystals are triclinic, space group P, with Z= 4 in a unit cell of dimensions a= 11.130(3), b= 18.887(5), c= 14.370(5)Å, α= 108.8(3), β= 90.1(2), γ= 95.1 (2)°. The structure has been solved by Patterson and Fourier methods and refined by block-diagonal least-squares to R= 0.10 for 3 630 observed reflections. The σ-bonded alkenyl group is perpendicular to the metal co-ordination plane. A short intramolecular contact between the nitrogen and a chlorine atom suggest the existence of a hydrogen bond.Keywords
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