Multiple bonds between main-group elements and transition metals. 86. Methyltrioxorhenium(VII) and trioxo(.eta.5-pentamethylcyclopentadienyl)rhenium(VII): structures, spectroscopy and electrochemistry

Lewis acid-modified mesoporous alumina: A new catalyst carrier for methyltrioxorhenium in metathesis of olefins bearing functional groups

“…The IR spectrum of MTO/ZnCl 2 //mesoAl 2 O 3 showed two weak absorption bands at 2922 and 2856 cm À1 that were not observed in the spectrum of the carrier, ZnCl 2 //meso-Al 2 O 3 . Since two absorption bands at 2984 and 2899 cm À1 appear for free MTO [14], the two observed bands are assigned to asymmetric and symmetric C-H stretching vibrations of MTO anchored on the modified carrier without decomposition.…”

High-valent Organorhenium Compounds

“…108 The C 5 Me 4 Et derivative of (28) has also been prepared from the tricarbonyl, 2f ' 105 An electron diffraction study o f (28) has been carried out. 107 A compilation of IR and l7 O NMR data for rhenium(VII) Cp trioxo compounds, (12), and [ReO 3 Ph] has also been presented. 109 There are three synthetically important rhenium(V) compounds derived directly f r o m (28) (Scheme 12).…”

New Organometallic Technetium Complexes in High and Low Oxidation States

“…The oxidation of Cp*Re(C0)3 was originally done with a two layer system consisting of benzene and H2O2/H2SO4 in moderate yield. We developed a much faster and higher yield synthesis of Cp*Re03 by using Mn207 in acetone or CCI4 as oxidizing agent [25]. This powerful oxidant is able to transform Cp*Re(C0)3 in minutes to the desired product.…”