SYNTHESIS, SPECTROSCOPIC AND STRUCTURAL CHARACTERIZATION OF PD-II AND PT-II COMPLEXES OF THE CYCLIC DISELENOETHER 1,5-DISELENACYCLOOCTANE, [8]ANESE(2)

The complexes [M([8]aneSe(2))Cl-2] and [M([8]aneSe(2))(2)] [PF6](2) [M = Pd or Pt, [8]aneSe(2) = Se(CH2)Se(CH2)(3)] have been prepared, and characterized by analysis, UV-vis and multinuclear (H-1, Se-77{H-1} and Pt-195) NMR spectroscopy and FAB mass spectrometry. The structures of [Pd([8]aneSe(2))Cl-2]. 0.5MeNO(2) [Pd-Se = 2.3647(8), 2.3693(8) Angstrom, Pd-Cl = 2.363(2), 2.348(2) A] and of the related bis(bidentate) diselenoether model complex [Pt{MeSe(CH2)(3)SeMe}(2)][PF6](2) . 2MeCN [Pt-Se = 2.414(2), 2.421(2) Angstrom] have been determined by single-crystal X-ray analyses.