Synthesis, characterisation and photochemistry of platinum diselenolenes.
The reaction between [Pt(PPh(3))(4)] and cycloocteno-1,2,3-selenadiazole or bis-cycloocteno-1,4-diselenin in toluene under reflux yielded the poorly soluble mononuclear platinum diselenolene [Pt(Se(2)C(8)H(12))(PPh(3))(2)], 1c. Treatment of [Pt(C(2)H(4))(PR(3))(2)] with a bis-cycloalkeno-1,4-diselenin in a mixture of 1,4-dioxane, THF and toluene under reflux led in good yield to the platinum diselenolenes [Pt(Se(2)C(n+4)H(2n+4))(PR(3))(2)] (R = Et (2), Bu (3); n = 3 (b), 4 (c)). The analogous complexes [Pt(Se(2)C(8)H(12))(L)] (L = dppm: 4c; L = dppe: 5c; L = dppp: 6c) were prepared from 1c via ligand exchange with chelating phosphines. All new compounds have been characterised by multinuclear NMR, IR and UV-visible spectroscopy and mass spectrometry, and their luminescence properties have been examined. The molecular structures of [Pt(Se(2)C(7)H(10))(PEt(3))(2)] (2b), [Pt(Se(2)C(8)H(12))(PEt(3))(2)] (2c) and [Pt(Se(2)C(8)H(12))(dppm)] (4c) have been determined by X-ray crystallography.
Morley
Christopher P
CP
Department of Chemistry, University of Wales Swansea, Singleton Park, Swansea, SA2 8PP, UK. morleycp@cardiff.ac.uk
Webster
Christopher A
CA
Douglas
Peter
P
Rofe
Karen
K
Di Vaira
Massimo
M