1398413-28-9Relevant articles and documents
Platinum(II) complexes of cyclic triphosphenium ions: A 31P NMR spectroscopic and computational study
Coffer, Philippa K.,Deng, Robert M.K.,Dillon, Keith B.,Fox, Mark A.,Olivey, Richard J.
, p. 9799 - 9808 (2012/11/06)
The first transition metal complexes of cyclic triphosphenium ions have been unequivocally identified in solution by 31P NMR spectroscopy. The ligands coordinate to platinum(II) via the central phosphorus atom, but only when at least one of the outer phosphorus atoms has non-aromatic substituents. Depending on the system, either trans- (the kinetic reaction product) and/or cis- (the thermodynamic reaction product) complexes are formed. The 1J coupling constants between 195Pt and the central phosphorus atom of the CTI (PA) are small for both cis- and trans-isomers, between 900 and 1300 Hz, whereas other phosphanes in these complexes derived from the platinum(II) starting material show normal 1JPtP values. These results suggest a possible long P-Pt bond between the overall positively charged ligand and the platinum(II) cation. Calculations including predicted 31P NMR shifts for the CTIs and their Pt(II) complexes largely support our experimental findings.
