40825-60-3Relevant academic research and scientific papers
RESTRICTED ROTATION OF THE OLEFIN AND AMINE LIGANDS IN cis-DICHLORO(p-TOLUIDINE)(ETHYL VINYL ETHER)PLATINUM(II)
Lazzaroni, Raffaello,Uccello-Barretta, Gloria,Bertozzi, Sergio,Salvadori, Piero
, p. 145 - 152 (2007/10/02)
cis-Dichloro(p-toluidine)(olefin)platinum(II) complexes, in which the olefin is either ethyl vinyl ether or ethylene, have been investigated by 1H NMR spectroscopy over a range of temperatures ( +50 to -60 deg C ) in order to study the rotation of the olefin ligand.The results give no evidence of rotation of the amine or vinyl ether ligands even at the highest temperature investigated, +50 deg C, only one of the two possible rotational isomers is present, and this is attributed to the presence of intramolecular hydrogen bonding between the oxygen atom of the vinyl ether and the -NH- group of the amine.In contrast, the amine and vinyl ligands in the ethylene complex rotate freely at room temperature, coalescence being observed above -25 deg C for the ethylene protons.
APPLICATION OF SPECTROSCOPIC TECHNIQUES TO SUBSTITUTED ANILINE DERIVATIVES OF ZEISE'S SALT
Foulds, Gary A.,Thornton, David A.
, p. 309 - 314 (2007/10/02)
The 1H NMR, IR and electronic spectra are reported for a range of complexes trans- comprising fifteen variously-substituted anilines, R-an.The coupling constant, JPt-H, is approximately 64 Hz which is consistent with trans coordination.The chemical shift of the olefinic protons is relatively unaffected by variation of R but the shielding of the aromatic protons is slightly modified.All three infrared modes νPt-C2, νPt-N and νC-C (olefin) are simultaneously increased by electron-releasing substituents showing that the electronic effects of R are transmitted throughout the complex molecule.The UV spectra show that the ? -> ?* transition within the aniline ring is the electronic band of maximum sensitivity to R.
