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

Abstract

Reaction of [Pd(PPh₃)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 [Pd₂{SeC(R¹)[double bond, length half m-dash]C(R²)Se}₂(PPh₃)₂] [R¹,R² = (CH₂)_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.

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