Homogeneous Catalysis | An-Najah Staff

Homogeneous Catalysis of The Reaction of Silanes with Alcohols Using Mn2(CO)10

Tue, 2014-03-25 12:22 — Shukri Mohammed Khalaf

Authors:

Shukri Khalaf

Department of Chemistry, An-Najah N. University, Nablus, PO Box 7, West Bank, Palestine

Current Affiliation:

Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine

[email protected]

Mohammad Al Nuri

Department of Chemistry, An-Najah N. University, Nablus, PO Box 7, West Bank, Palestine

Hikmat S. Hilal

Department of Chemistry, An-Najah N. University, Nablus, PO Box 7, West Bank, Palestine

Maha Karmi

Department of Chemistry, An-Najah N. University, Nablus, PO Box 7, West Bank, Palestine

Preferred Abstract (Original):

Dimanganese decacarbonyl catalyst has been evaluated in the reactions of HSiR₃ (R = Et, OEt) with R'OH (R' = Me, Et, i-Pr, t-Bu and benzyl), under various conditions. The order of reactivity of the alcohols decreases when more bulky alkyl groups are used, and that of the silanes increases if a more electron-withdrawing group (OEt) is used. Kinetic analysis indicates that the reaction is first order with respect to the silane, to the alcohol and to the catalyst. The effects of varying the solvent and adding a phosphine ligand have also been investigated.

Homogeneous Catalysis of The Reaction of Silanes with Alcohols Using Mn2(CO)10

Wed, 2010-04-21 14:32 — Hikmat S. Hilal, D.Sc.

Journal Title, Volume, Page:

Journal of Molecular Catalysis Volume 35, Issue 2, May 1986, Pages 137-142

Year of Publication:

2006

Link:

http://www.sciencedirect.com/science/article/pii/0304510286870195

Authors:

Hikmat S. Hilal

Chemistry Department, An-Najah National University, P. O. Box 7, Nablus, West Bankvia Israel

Current Affiliation:

Department of Chemistry, An-Najah N. University, Nablus, PO Box 7, West Bank, Palestine

[email protected]

Shukri Khalaf

Department of Chemistry, An-Najah N. University, Nablus, PO Box 7, West Bank, Palestine

Mohammad Al Nuri

Department Of Chemistry, An-Najah N. University, Nablus, PO Box 7, West Bank, Palestine

Maha Karmi

Department of Chemistry, An-Najah N. University, Nablus, PO Box 7, West Bank, Palestine

Preferred Abstract (Original):

Dimanganese decacarbonyl catalyst has been evaluated in the reactions of HSiR₃ (R = Et, OEt) with R'OH (R' = Me, Et, i-Pr, t-Bu and benzyl), under various conditions. The order of reactivity of the alcohols decreases when more bulky alkyl groups are used, and that of the silanes increases if a more electron-withdrawing group (OEt) is used. Kinetic analysis indicates that the reaction is first order with respect to the silane, to the alcohol and to the catalyst. The effects of varying the solvent and adding a phosphine ligand have also been investigated.

Homogeneous Catalysis of O-Silylation Reactions Using Tris (Acetylacetonato) Cobalt (III)

Wed, 2010-04-21 14:32 — Hikmat S. Hilal, D.Sc.

Journal Title, Volume, Page:

An-Najah University Journal For Research - Natural Sciences, Volume 3, 1986 Pages: 35-43

Year of Publication:

1986

Link:

http://scholar.najah.edu/publication/journal-article/homogeneous-catalysis-o-sil...

Authors:

Hikmat S. Hilal

Chemistry Department, An-Najah National University, Nablus

Current Affiliation:

Department of Chemistry, An-Najah N. University, Nablus, PO Box 7, West Bank, Palestine

[email protected]

Preferred Abstract (Original):

Tris (acetylacetonato) cobalt (III), (Co(acac)3), has been used to catalyse o-silylation reactions of R 3 Siff (R.z.Et,Et0) with R OH (Rt-Et, i-Pr, t-.Bu and C6Hj-). No reaction has been observed at room temperature, but the reaction is apparently enhanced when carried out at a higher temperature. The rate of the reaction varies with varying the concentration of the saline or the alcohol. Using different types of alcohols and silanes greatly affects the rate of the reaction. The rate of the reaction is affected by varying the concentration of the complex (Co(acaci6).

Homogeneous Catalysis of O-Silylation Reactions Using Octacarbonyldicobalt(O)

Wed, 2010-04-21 14:32 — Hikmat S. Hilal, D.Sc.

Journal Title, Volume, Page:

Microchemical Journal Volume 33, Issue 3, June 1986, Pages 392-398

Year of Publication:

1986

Link:

http://www.sciencedirect.com/science/article/pii/0026265X86900184

Authors:

Hikmat S. Hilal

Chemistry Department, An-Najah National University, Nablus, West Bank, Palestine

Current Affiliation:

Department of Chemistry, An-Najah N. University, Nablus, PO Box 7, West Bank, Palestine

[email protected]

Preferred Abstract (Original):

Octacarbonyldicobalt(O) has been used to catalyze the reaction of R3SiH (R = Et and EtO) with R′OH (R′ = Me, Et, n-Pr, i-Pr, and t-Bu). The reaction of MeOH with (EtO)3SiH, in toluene at 27 °C, was first-order with respect to the catalyst, to the silane, and to the alcohol. The order of reactivity of the alcohols was MeOH > EtOH > n-PrOH > i-PrOH > t-BuOH, reflecting the steric effect associated with the size of the organic group. Addition of triphenyl phosphine (Ph3P) to the reaction mixture slowed down the reaction. The reaction proceeds faster if nonpolar solvents are used, and the rate of the reaction is very sensitive to temperature.