65468-10-2Relevant articles and documents
Multinuclear and dynamic NMR study of trans-[Pt(Cl)(PHCy2) 2(PCy2)], [Pt(Cl)(PHCy2)3][BF 4], [Pt(Cl)(PHCy2)3][Cl], trans-[Pt(Cl) (PHCy2)2{P(S)Cy2}], and trans-[Pt(Cl)(PHCy 2)2{P(O)Cy2
Mastrorilli, Piero,Nobile, Cosimo F.,Latronico, Mario,Gallo, Vito,Englert, Ulli,Fanizzi, Francesco P.,Sciacovelli, Oronzo
, p. 9097 - 9104 (2005)
Dynamic NMR experiments on trans-[Pt(Cl)(PHCy2) 2{P(X)Cy2}]2 where X is a lone pair (1, z = 0), H (2, z = +1), S (3, z = 0), or O (4, z = 0) show that the rotation around the P(X)-Pt bond is hindered for all molecules studied, with ΔG ? ranging from 8.2 to 11.0 kcal/mol. The highest value of the series was calculated for trans-[Pt(Cl)-(PHCy2)2{P(O) Cy2}] (4) where intramolecular P=O...H-P interactions act as a molecular brake at room temperature. Single-crystal X-ray diffraction confirms the presence of both intra and intermolecular P=O...H interactions in solid 4. In the case of [Pt(Cl)(PHCy2)3]Cl, multinuclear NMR analysis indicates the presence of a P-H...Cl- interaction in aromatic or halogenated solvents which could have also a minor effect on the rotational barrier around the P(X)-Pt bond.
