Selectivity

waheedjj's picture

Poly (Siloxane)-Supported ‎Decacarbonyldimanganese(0) Catalyst for Terminal ‎Olefin Hydrosilylation Reactions: The Effect of the ‎Support on the Catalyst Selectivity, Activity and ‎Stability

Journal Title, Volume, Page: 
Journal of Molecular Catalysis A: Chemical Volume 144, Issue 1, Pages 47–59
Year of Publication: 
1999
Authors: 
Waheed J. Jondi
Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine
Current Affiliation: 
Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine
Moayyad M. Masoud
Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine
Mohammad A. Suleiman
Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine
Hikmat S. Hilal
Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine
Shukri Khalaf
Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine
Preferred Abstract (Original): 

A new class of supported carbonyl manganese catalyst was prepared by treating the dimeric decacarbonyldimanganese(0), Mn2(CO)10, with insoluble aminated poly(siloxane) surface. Solid state FT-IR spectra indicated that the supported catalyst is a dimeric complex that is substituted with two amine ligands, one at each Mn atom. The supported manganese complex was investigated as catalyst for the hydrosilylation reaction of terminal olefins. Contrary to the homogeneous Mn2(CO)10 catalytic system, the supported manganese complex was completely selective toward the hydrosilylation reaction with no detectable olefin isomerization or other side-reaction products. Furthermore, the catalyst was selective to produce the linear hydrosilylation product rather than the branched one. No lowering in catalyst activity due to the support was observed. A good proportion of the catalyst activity after separation and reuse was retained for at least four times. Highly reproducible catalytic activity measurements were obtained with catalytic samples taken from same prepared batch. Different prepared batches showed lower reproducibility. The effect of different reaction parameters, such as the solvent effect, the temperature effect, the concentration effect and the added-ligand effect have also been studied. Laine's kinetic studies indicated that the cluster remained intact during the reaction.

shkhalaf's picture

Poly (Siloxane)-Supported ‎Decacarbonyldimanganese(0) Catalyst for Terminal ‎Olefin Hydrosilylation Reactions: The Effect of the ‎Support on the Catalyst Selectivity, Activity and ‎Stability

Journal Title, Volume, Page: 
Journal of Molecular Catalysis A: Chemical Volume 144, Issue 1, Pages 47–59
Year of Publication: 
1999
Authors: 
Shukri Khalaf
Department of Chemistry, An-Najah N. University, P.O. Box 7, Nablus, Palestine
Current Affiliation: 
Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine
Hikmat S. Hilal
Department of Chemistry, An-Najah N. University, P.O. Box 7, Nablus, Palestine
Mohammad A. Suleiman
Department of Chemistry, An-Najah N. University, P.O. Box 7, Nablus, Palestine
Waheed J. Jondi
Department of Chemistry, An-Najah N. University, P.O. Box 7, Nablus, Palestine
Moayyad M. Masoud
Department of Chemistry, An-Najah N. University, P.O. Box 7, Nablus, Palestine
Preferred Abstract (Original): 

A new class of supported carbonyl manganese catalyst was prepared by treating the dimeric decacarbonyldimanganese(0), Mn2(CO)10, with insoluble aminated poly(siloxane) surface. Solid state FT-IR spectra indicated that the supported catalyst is a dimeric complex that is substituted with two amine ligands, one at each Mn atom. The supported manganese complex was investigated as catalyst for the hydrosilylation reaction of terminal olefins. Contrary to the homogeneous Mn2(CO)10 catalytic system, the supported manganese complex was completely selective toward the hydrosilylation reaction with no detectable olefin isomerization or other side-reaction products. Furthermore, the catalyst was selective to produce the linear hydrosilylation product rather than the branched one. No lowering in catalyst activity due to the support was observed. A good proportion of the catalyst activity after separation and reuse was retained for at least four times. Highly reproducible catalytic activity measurements were obtained with catalytic samples taken from same prepared batch. Different prepared batches showed lower reproducibility. The effect of different reaction parameters, such as the solvent effect, the temperature effect, the concentration effect and the added-ligand effect have also been studied. Laine's kinetic studies indicated that the cluster remained intact during the reaction.

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Hikmat S. Hilal's picture

Poly(Siloxane)-Supported Decacarbonyldimanganese(0) Catalyst for Terminal Olefin Hydrosilylation Reactions: The Effect of The Support on The Catalyst Selectivity, Activity and Stability

Journal Title, Volume, Page: 
Journal of Molecular Catalysis A: Chemical Volume 144, Issue 1, 22 July 1999, Pages 47-59
Year of Publication: 
1999
Authors: 
Hikmat S. Hilal
Department of Chemistry, An-Najah N. University, Nablus, PO Box 7, West Bank, Palestine
Current Affiliation: 
Department of Chemistry, An-Najah N. University, Nablus, PO Box 7, West Bank, Palestine
Mohammad A. Suleiman
Department of Chemistry, An-Najah N. University, Nablus, PO Box 7, West Bank, Palestine
Waheed J. Jondi
Department of Chemistry, An-Najah N. University, Nablus, PO Box 7, West Bank, Palestine
Shukri Khalaf
Department of Chemistry, An-Najah N. University, Nablus, PO Box 7, West Bank, Palestine
Moayyad M. Masoud
Department of Chemistry, An-Najah N. University, Nablus, PO Box 7, West Bank, Palestine
Preferred Abstract (Original): 

A new class of supported carbonyl manganese catalyst was prepared by treating the dimeric decacarbonyldimanganese(0), Mn2(CO)10, with insoluble aminated poly(siloxane) surface. Solid state FT-IR spectra indicated that the supported catalyst is a dimeric complex that is substituted with two amine ligands, one at each Mn atom. The supported manganese complex was investigated as catalyst for the hydrosilylation reaction of terminal olefins. Contrary to the homogeneous Mn2(CO)10 catalytic system, the supported manganese complex was completely selective toward the hydrosilylation reaction with no detectable olefin isomerization or other side-reaction products. Furthermore, the catalyst was selective to produce the linear hydrosilylation product rather than the branched one. No lowering in catalyst activity due to the support was observed. A good proportion of the catalyst activity after separation and reuse was retained for at least four times. Highly reproducible catalytic activity measurements were obtained with catalytic samples taken from same prepared batch. Different prepared batches showed lower reproducibility. The effect of different reaction parameters, such as the solvent effect, the temperature effect, the concentration effect and the added-ligand effect have also been studied. Laine's kinetic studies indicated that the cluster remained intact during the reaction.

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