899828-41-2Relevant academic research and scientific papers
31P NMR and DFT studies on square-planar bis(diphenylphosphinoethyl)phenylphosphine (triphos) complexes of Pt(II) with pyridines and anilines
Bortoluzzi, Marco,Annibale, Giuliano,Marangoni, Giampaolo,Paolucci, Gino,Pitteri, Bruno
, p. 1979 - 1984 (2006)
Cationic complexes of the type [Pt(L)(triphos)](ClO4)2, where L is a 4-substituted pyridine {L = 4-R-py = 4-cyanopyridine (4-CN-py), isonicotinic acid (4-COOH-py), methylisonicotinate (4-COOMe-py), 4-acetylpyridine (4-MeCO-py), pyridine (4-H-py), 4-methylpyridine (4-Me-py), 4-aminopyridine (4-NH2-py)} or a 4-substituted aniline {L = 4-R-an = 4-nitroaniline (4-NO2-an), 4-cyanoaniline (4-CN-an), 4-chloroaniline (4-Cl-an), aniline (4-H-an), 4-methylaniline (4-Me-an), 4-methoxyaniline (4-MeO-an)}, have been prepared from cis/trans-PtCl2(SMe2)2. The cis and trans 1JPt-P coupling constants measured in CD3NO2 were found to be dependent upon the pKa of L. For the series of the para-substituted pyridines 4-R-py the linear correlations 1JPt-P1 = 2918 - 16.9 pKa and 1JPt-P2 = 2371 + 5.8 pKa (P1 = phosphorus nucleus trans to N, P2 = phosphorus nuclei cis to N) were found. The complexes with L = para-substituted anilines 4-R-an show a different behaviour. The results are discussed on the basis of DFT calculations.
