Binuclear complexes of palladium(II) and platinum(II) containing bridging ethylselenolato group: X-ray crystal structure of [Pt 2Cl 2(μ-SeEt) 2(PEt 3) 2

Abstract

The reaction of [M 2Cl 2(μ-Cl) 2(PR 3) 2] with NaSeEt in 1 : 1 and 1 : 2 stoichiometry gave [M 2Cl 2(μ-Cl)(μ-SeEt)(PR 3) 2]a nd [M 2Cl 2(μ-SeEt) 2(PR 3) 2] (M = Pd or Pt; PR 3 = PEt 3, PBu 3, PMe 2Ph or PMePh 2), respectively. These complexes were characterized by elemental analysis and NMR data ( 1H and 31P). The mixed chloro/ethylselenolato bridged complexes adopt a cis configuration with phospine trans to the bridging chloride. The molecular structure of [Pt 2Cl 2(μ-SeEt) 2(PEt 3) 2] has been determined by single crystal X-ray diffraction. The complex has a planar four-membered “Pt 2Se 2” bridge.