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14 results on '"Mitchell S. Chinn"'

3. Dihydrogen complexes of ruthenium. 2. Kinetic and thermodynamic considerations affecting product distribution

Author

Mitchell S. Chinn and D. Michael Heinekey

Subjects
Reaction mechanism, Stereochemistry, chemistry.chemical_element, Protonation, General Chemistry, Coupling (probability), Biochemistry, Catalysis, Ruthenium, NMR spectra database, Crystallography, Colloid and Surface Chemistry, chemistry, Proton NMR, Dihydrogen complex, Isomerization
Abstract

Cationic ruthenium dihydrogen complexes of the form (({eta}-C{sub 5}H{sub 5})Ru(L)(L{prime})({eta}{sup 2}-H{sub 2}))BF{sub 4} (L = CO, L{prime} = PCy{sub 3} (1a), PPh{sub 3} (2a), PMe{sub 2}Ph (3a), PMe{sub 3} (4a) have been prepared by protonation of the corresponding neutral hydrides. Carbonyl free derivatives such as (({eta}-C{sub 5}H{sub 5})Ru(P P{prime})({eta}{sup 2}-H{sub 2}))BF{sub 4} (P P{prime} = 1,2-bis(dimethylphosphino)ethane (dmpe) (5a), (1,1-dimethyl-2,2-diphenylphosphino)ethane (dmdppe) (6a), (R)-(+)-1,2-bis(diphenylphosphino)propane ((R)-prophos) 8a), bis(PPh{sub 3}) (9a)) were similarly prepared. Identification of these species as dihydrogen complexes is based upon observation of substantial H-D coupling (22-32 Hz) in the {sup 1}H NMR spectra of the Hd analogues, prepared by protonation of the corresponding deuterides.

Published
1990
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6. Enhancement of stereoselectivity in catalytic cyclopropanation reactions

Author

Keith M. DeVries, Michael P. Doyle, Kuo Liang Loh, and Mitchell S. Chinn

Subjects
Cyclopropanation, medicine.drug_class, Organic Chemistry, Cyclohexene, chemistry.chemical_element, Carboxamide, Biochemistry, Styrene, Rhodium, Catalysis, chemistry.chemical_compound, chemistry, Drug Discovery, medicine, Organic chemistry, Stereoselectivity, Acetamide
Abstract

Significant enhancement of trans(anti) stereoselectivity is achieved in rhodium(II) acetamide catalyzed cyclopropanation reactions of 2,3,4-trimethyl-3-pentyl diazoacetate (ODA) and diazoacetamides.

Published
1987
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7. Synthesis and properties of a series of ruthenium dihydrogen complexes

Author

D. Michael Heinekey and Mitchell S. Chinn

Subjects
Inorganic chemistry, Cationic polymerization, chemistry.chemical_element, Context (language use), General Chemistry, Resonance (chemistry), Biochemistry, Combinatorial chemistry, Oxidative addition, Catalysis, Ruthenium, NMR spectra database, Colloid and Surface Chemistry, Transition metal, chemistry, Dihydrogen complex
Abstract

Since the initial discovery by Kubas, dihydrogen complexes of the transition metals have been the subject of considerable interest since they may serve as models for the very important process of oxidative addition of dihydrogen. In this context, Kubas has recently reported a tungsten complex in which a dihydride is in reversible equilibrium with a dihydrogen complex. The authors now report further examples of such equilibria in cationic complexes of ruthenium.

Published
1987
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8. Highly reactive dihydrogen complexes of ruthenium and rhenium: facile heterolysis of coordinated dihydrogen

Author

D. Michael Heinekey, Neil G. Payne, Chadwick D. Sofield, and Mitchell S. Chinn

Subjects
Tetrafluoroborate, Organic Chemistry, chemistry.chemical_element, Protonation, Nuclear magnetic resonance spectroscopy, Rhenium, Photochemistry, Heterolysis, Medicinal chemistry, Ruthenium, Inorganic Chemistry, chemistry.chemical_compound, chemistry, Dihydrogen complex, Physical and Theoretical Chemistry
Abstract

Etude de la protonation et de l'heterolyse du coordinat dihydrogene des complexes [η 5 -C 5 M 5 (Ru)(CO) 2 (η 2 -H 2 )] BF 4 et [η 5 -C 5 M 5 (Re)(CO)(NO)(η 2 -H 2 )] BF 4 , au moyen de la spectrometrie RMN

Published
1989
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9. Olefin coordination with rhodium(II) perfluoroalkanoates in solution

Author

Nancy K. Harn, Alada C. Caughey, Surendra N. Mahapatro, Ann E. Redwine, Michael P. Doyle, Mark R. Colsman, and Mitchell S. Chinn

Subjects
Inorganic Chemistry, chemistry.chemical_classification, chemistry.chemical_compound, Olefin fiber, Chemistry, Alkene, Cyclohexene, chemistry.chemical_element, Organic chemistry, Physical and Theoretical Chemistry, Catalysis, Rhodium, Styrene
Published
1987
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10. ChemInform Abstract: Enhancement of Stereoselectivity in Catalytic Cyclopropanation Reactions

Author

Kuo Liang Loh, Keith M. DeVries, Mitchell S. Chinn, and Michael P. Doyle

Subjects
chemistry.chemical_compound, Chemistry, Cyclopropanation, chemistry.chemical_element, Stereoselectivity, General Medicine, Medicinal chemistry, Acetamide, Catalysis, Rhodium
Abstract

Significant enhancement of trans(anti) stereoselectivity is achieved in rhodium(II) acetamide catalyzed cyclopropanation reactions of 2,3,4-trimethyl-3-pentyl diazoacetate (ODA) and diazoacetamides.

Published
1987
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12. ChemInform Abstract: OLEFIN COORDINATION WITH RHODIUM(II) TRIFLUOROACETATE

Author

Mark R. Colsman, Mitchell S. Chinn, and Michael P. Doyle

Subjects
Olefin fiber, chemistry, chemistry.chemical_element, General Medicine, Medicinal chemistry, Rhodium
Abstract

Premiere presentation de la coordination d'une olefine avec un carboxylate de Rh(II), et des constantes d'equilibre pour les composes resultant de l'addition de Rh 2 (OOCCF 3 ) 4 et d'alkenes. Etude a partir des spectres visibles

Published
1985
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13. Olefin coordination with rhodium(II) trifluoroacetate

Author

Mark R. Colsman, Mitchell S. Chinn, and Michael P. Doyle

Subjects
chemistry.chemical_classification, Olefin fiber, Inorganic chemistry, chemistry.chemical_element, Molecular electronic transition, Rhodium, Inorganic Chemistry, chemistry.chemical_compound, chemistry, Polymer chemistry, Molecule, Carboxylate, Physical and Theoretical Chemistry, Inorganic compound, Equilibrium constant, Visible spectrum
Abstract

Premiere presentation de la coordination d'une olefine avec un carboxylate de Rh(II), et des constantes d'equilibre pour les composes resultant de l'addition de Rh 2 (OOCCF 3 ) 4 et d'alkenes. Etude a partir des spectres visibles

Published
1984
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14. Homogeneous Transition Metal Catalyzed Reactions

Author

DONALD W. SLOCUM, WILLIAM R. MOSER, Robin Whyman, D. Christopher Roe, Richard Eisenberg, Thomas C. Eisenschmid, Mitchell S. Chinn, Rein U. Kirss, Tom Ziegler, Louis Versluis, J. D. Druliner, L. D. Greller, M. G. Roelofs, E. Wasserman, Peter C. Ford, Simon T. Belt, Hidemasa Takaya, Tetsuo Ohta, Kazushi Mashima, Henri Brunner, James P. Collman, Xumu Zhang, Virgil Lee, Robert T. Hembre, John I. Brauman, Kevin Burgess, Michael J. Ohlmeyer, Masato Tanaka, Toshiyasu Sakakura, Robert H. Crabtree, Steven H. Brown, Cesar A. Muedas, Paul Krajnik, Richard R. Ferguson, Robert G. Bergman, Jay A. Labinger, Andrew M. Herring, John E. Bercaw, J. J. Lin, J. F. Knifton, Bradford B. Wayland, Alan E. Sherry, Virginia L. Coffin, André Mortreux, Francis Petit, Iwao Ojima, Zhaoda Zhang, Anna Korda, Patrizia Ingallina, Nuria Clos, Ferenc Ungváry, Attila Sisak, László Markó, Giuseppe Braca, Anna Maria Raspolli Galletti, Glauco Sbrana, Elizeu Trabuco, Kenneth G. Moloy, Richard W. Wegman, R. J. Klingler, T. R. Krause, J. W. Rathke, Scott A. Laneman, George G. Stanley, Piet W, DONALD W. SLOCUM, WILLIAM R. MOSER, Robin Whyman, D. Christopher Roe, Richard Eisenberg, Thomas C. Eisenschmid, Mitchell S. Chinn, Rein U. Kirss, Tom Ziegler, Louis Versluis, J. D. Druliner, L. D. Greller, M. G. Roelofs, E. Wasserman, Peter C. Ford, Simon T. Belt, Hidemasa Takaya, Tetsuo Ohta, Kazushi Mashima, Henri Brunner, James P. Collman, Xumu Zhang, Virgil Lee, Robert T. Hembre, John I. Brauman, Kevin Burgess, Michael J. Ohlmeyer, Masato Tanaka, Toshiyasu Sakakura, Robert H. Crabtree, Steven H. Brown, Cesar A. Muedas, Paul Krajnik, Richard R. Ferguson, Robert G. Bergman, Jay A. Labinger, Andrew M. Herring, John E. Bercaw, J. J. Lin, J. F. Knifton, Bradford B. Wayland, Alan E. Sherry, Virginia L. Coffin, André Mortreux, Francis Petit, Iwao Ojima, Zhaoda Zhang, Anna Korda, Patrizia Ingallina, Nuria Clos, Ferenc Ungváry, Attila Sisak, László Markó, Giuseppe Braca, Anna Maria Raspolli Galletti, Glauco Sbrana, Elizeu Trabuco, Kenneth G. Moloy, Richard W. Wegman, R. J. Klingler, T. R. Krause, J. W. Rathke, Scott A. Laneman, George G. Stanley, and Piet W

Subjects
Catalysis--Congresses, Transition metal catalysts--Congresses
Published
1992

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