Can. J. Chem. 59, 1188 (1981). Proton decoupled "P nmr spectra are reported for a series of dinuclear metal complexes containing bridging dialkyl-or diarylphosphido groups: [M,CI,),(PR3),], M = Pd, R' = Ph, R, = Et, or HPh,; M = Pd, R' = Me, R, = Et,, Ph,, or HMe,; M = Pt, R' = Ph, R, = Et, or HPh,; and [M2(p-PPh,),(dppe),]Cl,, M = Pd, or Pt, dppe = Ph,P(CH,),PPh,. Detailed analysis and computer simulation of the spectra in the AA'XX', AA'XX'M, AA'A"An'XX', and AA'AA"'XX'M spin systems leads to the following ranges and relative signs for coupling constants involving the bridging phosphorus atoms: ,J(R,P