75359-47-6Relevant academic research and scientific papers
Photochemical reactions of and
Baudry, Denise,Cormier, Jean-Michel,Ephritikhine, Michel
, p. 349 - 353 (2007/10/02)
(Ia) reacted in tetrahydrofuran with cyclopentadiene or cyclohexa-1,4-diene under UV irradiation to give (II), and a 1:2 mixture of and (III), respectively; III was isolated from the photochemical reaction of Ia with 3,3-dimethylbutene in benzene.When using (Ib) (dppe = Ph2PCH2CH2PPh2) instead of Ia in these three reactions, no cyclopentadienyl compound was obtained, but (IV) and (V) were isolated; IV and V are precursors to arene and cyclohexadienylrhenium derivatives containing dppe.
REACTION OF (PPh3)2ReH7 WITH DIENES: PREPARATION AND SOME PROPERTIES OF TRIHYDRO η4-DIENE COMPLEXES OF RHENIU
Baudry, Denise,Ephritikhine, Michael,Felkin, Hugh
, p. 363 - 376 (2007/10/02)
L2ReH7 (L=PPh3) reacts smoothly with acyclic and cyclic dienes to give crystalline, air-stable, trihydrido-Η4-dienerhenium complexes L2(η4-diene)ReH3.The majority of these complexes are fluxional at room temperature; their NMR spectra suggest that at low temperature (-50 deg C) they are pentagonal bipyramidal, with the two phosphine ligands apical and the remaining ligands equatorial.Except for L2(η4-cyclopentadiene)ReH3, which readily loses dihydrogen to give L2(η5-C5H5)ReH, these diene trihydrides are thermally remarkably stable; L2(η4-cyclohexa-1,3-diene)ReH3 loses dihydrogen at >100 deg C to afford L2(η5-cyclohexadienyl)ReH2 and then L2(η6-C6H6)ReH, and L2(η4-butadiene)ReH3 and L2(η4-cycloocta-1,5-diene)ReH3 are stable in air up to 115 and 130 deg C, respectively.Protonation of the trihydrido-η4-diene complexes affords the corresponding saturated hydrocarbons and/or olefins.Hydrogenation of L2(η4-2,3-dimethylbutadiene)ReH3 regenerates the heptahydride L2ReH7.
