11087-98-2Relevant academic research and scientific papers
Formation of mononuclear and dinuclear halide complexes of rhenium from reactions of the polyhydrides Re2H8(PR3)4 and ReH7(PR3)2 with allyl halides and other halogen-containing reagents
Allison, Joe D.,Cameron, Charles J.,Walton, Richard A.
, p. 1599 - 1603 (2008/10/08)
Reactions occur between ReH7(PPh3)2 and the allyl halides C3H5X (X = Cl, Br, and I) to afford the rhenium(IV) salts (Ph3PC3H5)2ReX6; H2 and propene (plus a trace of propane) are the principal gaseous products. Allyl thiocyanate reacts in an analogous fashion. The pentahydride complexes ReH5(PPh3)2L (L = C6H11NH2 and C5H10NH) are also converted to (Ph3PC3H5)2ReCl6, H2, and propene by allyl chloride. The dinuclear core of Re2H8(PPh3)4 is preserved upon reaction with allyl chloride and bromide to give the quadruply bonded dirhenium species (Ph3PC3H5)2Re2X 8 (X = Cl or Br) plus H2 and propene. In contrast to this, the reaction with allyl iodide results in the cleavage of the Re-Re bond and the formation of (Ph3PC3H5)2ReI6. The mononuclear polyhydride complex ReH7(PPh3)2 also reacts with the chlorocarbons CCl4, CHCl3, CH2Cl2, Me3CCl, and C6H5Cl to produce trans-ReCl4(PPh3)2 with the concomitant evolution of H2 and some hydrocarbons. The treatment of Re2H8(PPh3)4 with gaseous hydrogen chloride in methanol is unusual in that crystals of the mixed rhenium(III)-rhenium(IV) salt (Ph3PH)2Re2Cl8-5(Ph 3PH)ReCl5(PPh3) are formed. The course of these reactions is discussed, and the properties of the rhenium-containing complexes are described.
