One-Bond Metal-Phosphorus Coupling Constants - A Survey

Ill One-Bond Metal-Phosphorus Coupling Constants -A Survey 

The previous paragraphs have concerned themselves with the qualitative aspects of the theory of one-and two-bond phosphorus couplings involving metals. In a number of instances we have cited specific if somewhat selective literature to support these ideas. The section which follows provides a more comprehensive survey of the types of molecules for which one-bond metal-phosphorus couplings have been reported. 

In the group, Cu, Ag, Au most emphasis has been placed on Ag since this metal possess two spin 1=1/2 isotopes, Ag and Ag, in almost equal proportions. The difference in coupling to phosphorus stemming from the different silver isotopes is readily observable and is directly proportional to the ratio of their gyromagnetic constants. J(Ag,P) values have been reported for the complexes Ag(PBu ), n = 1-4 [P5], Ag(P(pTol)2)j X n = 2-4 [96], Ag (P (OEt) ) X, n = 2-4 [102] and Ag(PP)X, where PP = 2,11-Bis(diphenylphosphinomethyl)benzo [c]phenanthrene and X is a variety of anionic ligands [97]. The values V(Ag,P) for the complexes [AgP ]2Ni(S2C2(CN)2)2 P = 3  

PEt Ph, PEt have recently appeared [P5]. These studies have primarily concerned themselves with the dependence of J(Ag,P) on the coordination number of the metal and the nature of the remaining ligands within the coordination sphere. Typically, J( Ag,P) values for phosphine complexes fall between 200 and 400 Hz. A sampling of data is shown in Table 15 (Chap. G). 

CuCPCOEt) ) [27] have also been reported. Cu is a quadrupolar 

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