145293-04-5Relevant academic research and scientific papers
REACTION OF DIIODINE WITH BIS-(O-DIPHENYLPHOSPHINOPHENYL)PHENYLPHOSPHINE (TP). FORMATION, CRYSTAL AND MOLECULAR STRUCTURE OF THE COMPOUND I3-C6H5CH3
Bigoli, Francesco,Deplano, Paola,Mercuri, Maria Laura,Pellinghelli, Maria Angela,Trogu, Emanuele F.
, p. 145 - 152 (2007/10/02)
A toluene solution of the title compound (TP) and an excess of diiodine gave, surprisingly, by slow evaporation of the solvent in air, the product I3-C6H5CH3, where one of the three phosphinic P atoms of the TP, is oxidized to POH and two to P=O moieties, giving rise to a monocation (1+).The X-ray structure of the compound has shown that the crystals are triclinic with P space group, a = 11.218(5), b = 14.469(6), c = 14.626(6) Angstroem, α = 93.67(2), β = 94.50(2), γ = 91.88(2) deg, V = 2360(2) Angstroem3, Z = 2.Solution and refinement of intensity data gave final residuals of R = 0.0512.The cation shows a conformation with a ten membered ring depending on the intramolecular hydrogen bond between the two extreme oxygen atoms and on O---H(Cph) interactions.The bond lengths P(1)-(O1), P(2)-O(2), P(3)-O(3) follow the order: 1.510(8), 1.486(7), 1.504(8) Angstroem respectively, as expected by the existence of the hydrogen bond between H(1) and O(3).The O-P-Cphenyl bond angles fall in the 107.1(5)-114.3(5) deg range.The triiodide anion is nearly linear and shows moderately asymmetric bond lengths . Key words: Diiodine; poly-arylphosphines; poly-arylphosphine-oxides; X-ray; triiodides.
