Dinuclear diselenolenes derived from cycloalkeno-1, 2, 3-selenadiazoles and tetrakis (triphenylphosphine) palladium

摘要

Reaction of [Pd(PPh_3)_4] with cycloalkeno-1, 2, 3-selenadiazoles or bis (cycloalkeno)-1, 4-diselenines in toluene under reflux led in good yield to the dinuclear diselenolenes [Pd_2{SeC(R~1)=C(R~2)Se}_2(PPh_3)_2][R~1, R~2=(CH_2)_n; n=4, 5, 6] which have been characterised by microanalysis, multinuclear NMR, IR, and mass spectroscopy; the molecular structure of the compound with n=6 has been determined by X-ray cystallography.