Rhenium silyl complexes

Schiff base complexes to aromatic silyl enol ethers/ " olefins/ sugars,Mn ° Schiff base complexes, " and rhenium(III) complexes " has been reported. Similar reactions are observed with the Mn (N)porphyrin complexes. The reaction products are dependant on the nature of the Schiff base ligand, both the yield and the enantiomeric excess being affected. " Salen nitridomanganese(V) complexes have been incorporated into Zeolite... 

High-valent rhenium silyl hydrides ReH5(PPh(Pr-i)2)2(SiHPh2)2 (27) and ReHsO CysL (SiH2Ph)2 have been characterized by neutron and X-ray diffraction, respectively. The complexes were prepared from the corresponding hydrides ReH7(PPh(Pr-/)2)2 and... 

Narasaka and coworkers reported radical-polar crossover addition/cyclization reactions of phenacyl bromides 204 and electron-rich alkenes such as (silyl) enol ethers 205, catalyzed by the rhenium(I) complex 206 (Fig. 57) [302], The active catalyst 206A formed after thermal nitrogen elimination from 206 reduced 204 either directly or by oxidative addition/homolysis via rhenium enolate 204A to... 

It is also worth noting that the Mn—Sn distance in MeCp(OC)2Mn-(H)SnPh3 is much greater than the Re—Si distance in Cp(CO)2Re(H)-SiPh3. The increased size of the atoms involved (relative to Mn and Si), therefore, cannot be responsible for the absence of a three-center bond in the rhenium silyl compound. The preference of the Cp(OC)2Mn moiety for this kind of bonding is manifested by the dinuclear complexes of type 11 [with Mn-Pt 280.4(3), Mn—H 169(15), Pt—H 200(15) pm in lib] (22a). 

Keywords Silyl Complexes / Platinum / Rhenium / Chelate / Heterobimetallics... 

Silicon and germanium hydrides react with cobalt, manganese and rhenium carbonyls affording complexes having a silicon (or germanium)-metal bond. These reactions, described previously for inactive compounds have been used in the synthesis of optically active silyl and germyl-transition metals ... 

Silyl manganese pentacarbonyl decomposes in a more complex way to give a mixture of two phases, "MnSi (actually a silicon-rich nonstoichiometric phase of approximate composition MnSii.25) and stoichiometric Mn5Si3, such that the overall metal silicon ratio is 1 1. The analogous rhenium system behaves similarly. 

Scheme 11 Reactions of rhenium complexes with silylated phosphine proligands...

Scheme 15 Silylated mixed-ligand rhenium and technetium complexes of the 3+1 type...

In contrast with the common activity of oxo-rhenium compounds in oxidation catalysis (see above), the Re -dioxo-complex [Re02l(PPh3)2] catalyzes the reductive hydrosilylation of aldehydes and ketones to give silyl ethers (reaction... 

Ethene, molybdenum complex, 26 102 rhenium complex, 26 110 Europium, tetrakis[T) -l, 3-bis(trimethyl-silyl)cyclopentadienyl]di-p.-chloro-di-, 27 171... 

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