Rd. Jackson et al., 1,8-BIS(DIPHENYLPHOSPHINO)NAPHTHALENE - A RIGID CHELATING, DIPHOSPHINE ANALOG OF PROTON SPONGE, Journal of organometallic chemistry, 458(1-2), 1993, pp. 30000003-30000004
The synthesis of the new diphosphine, 1,8-bis(diphenylphosphino) napht
halene (1a), and its X-ray crystal structure are reported. Protonation
of 1a gives a fluxional species to which a P-P bonded structure is as
signed. Despite the strain apparent in the solid state due to the prox
imity of the diphenylphosphino groups, it appears that 1a has a normal
coordination chemistry with platinum(II) and palladium(II).