Inorganic Chemistry, Vol.35, No.9, 2546-2548, 1996
Synthesis of New Bidentate Phosphine-Ligands Containing Saturated Phosphorus-Heterocycles
The synthesis of two ethylene-bridged bidentate phosphines is described. 1,2-Bis(1-phospholano)ethane ((C4H8)PCH2CH2P(C4H8)) was synthesized by the stepwise addition of 2,2-dioxo-1,3,2-dioxathiepane to H2PCH2CH2PH2. 1,2-Bis(1-phosphorinano)ethane ((C5H10)PCH2CH2P(C5H10)) was synthesized by the novel photochemical addition of 1,4-pentadiene to H2PCH2CH2PH2. These bis(phosphines) form two-to-one complexes of the form Fe(PP)(2)Cl-2 when added to iron(II) chloride.
Keywords:ENANTIOSELECTIVE HYDROGENATION REACTIONS;C-H BONDS;C2-SYMMETRICAL BIS(PHOSPHOLANES);TETRAPHOSPHINE P(CH2CH2PPH2)3;BIS(DIPHOSPHINE) COMPLEXES;OLIGOPHOSPHANE LIGANDS;ASYMMETRIC CATALYSIS;CYCLIC SULFATES;IRON;ACTIVATION