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DE2005833810

Publication Date	2001
Personal Author	Cutler, A. R.
Page Count	36
Abstract	Manganese carbonyl complexes serve as hydrosilation precatalysts for selectively transforming a carbonyl group into a siloxy methylene or a fully reduced methylene group. Substrates of interest include (1) aldehydes, ketones, carboxylic acids, silyl esters, and esters, and (2) their organometallic acyl counterparts. Three relevant catalytic reactions are shown. Two types of manganese precatalysts have been reported: (a) alkyl and acyl complexes (L)(C0)(sub 4)MnR (L = CO, PPh(sub 3); R = COCH(sub 3), COPh, CH(sub 3)) and (b) halides (CO)(sub 5)MnX and ((CO)(sub 4)MnX)(sub 2) (X = Br, I). The former promote hydrosilation and deoxygenation catalysis; the latter promote dehydrogenative silation of alcohols and carboxylic acids as well as hydrosilation and deoxygenation of some metallocarboxylic acid derivatives. In every case studied, these Mn precatalysts are far more reactive or selective than traditional Rh(I) precatalysts.
Keywords	Carbonyls Catalysis Silanes Chemical reactions Manganese compounds Catalytic effects
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Rensselaer Polytechnic Inst., Troy, NY. Dept. of Chemistry.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200524

Metal Carbonyl-Hydrosilane Reactions and Hydrosilation Catalysis. Final Report, (May 1, 1995-August 14, 1999.)

Metal Carbonyl-Hydrosilane Reactions and Hydrosilation Catalysis. Final Report, (May 1, 1995-August 14, 1999.)
DE2005833810

Publication Date	2001
Personal Author	Cutler, A. R.
Page Count	36
Abstract	Manganese carbonyl complexes serve as hydrosilation precatalysts for selectively transforming a carbonyl group into a siloxy methylene or a fully reduced methylene group. Substrates of interest include (1) aldehydes, ketones, carboxylic acids, silyl esters, and esters, and (2) their organometallic acyl counterparts. Three relevant catalytic reactions are shown. Two types of manganese precatalysts have been reported: (a) alkyl and acyl complexes (L)(C0)(sub 4)MnR (L = CO, PPh(sub 3); R = COCH(sub 3), COPh, CH(sub 3)) and (b) halides (CO)(sub 5)MnX and ((CO)(sub 4)MnX)(sub 2) (X = Br, I). The former promote hydrosilation and deoxygenation catalysis; the latter promote dehydrogenative silation of alcohols and carboxylic acids as well as hydrosilation and deoxygenation of some metallocarboxylic acid derivatives. In every case studied, these Mn precatalysts are far more reactive or selective than traditional Rh(I) precatalysts.
Keywords	Carbonyls Catalysis Silanes Chemical reactions Manganese compounds Catalytic effects
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Rensselaer Polytechnic Inst., Troy, NY. Dept. of Chemistry.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200524