ISOTOPE METHODS IN HOMOGENEOUS CATALYSIS.

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Description

The use of isotope labels has had a fundamentally important role in the determination of mechanisms of homogeneously catalyzed reactions. Mechanistic data is valuable since it can assist in the design and rational improvement of homogeneous catalysts. There are several ways to use isotopes in mechanistic chemistry. Isotopes can be introduced into controlled experiments and followed where they go or don't go; in this way, Libby, Calvin, Taube and others used isotopes to elucidate mechanistic pathways for very different, yet important chemistries. Another important isotope method is the study of kinetic isotope effects (KIEs) and equilibrium isotope effect (EIEs). Here ... continued below

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62 pages

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Bullock, R. M. & Bender, B. R. December 2000.

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Description

The use of isotope labels has had a fundamentally important role in the determination of mechanisms of homogeneously catalyzed reactions. Mechanistic data is valuable since it can assist in the design and rational improvement of homogeneous catalysts. There are several ways to use isotopes in mechanistic chemistry. Isotopes can be introduced into controlled experiments and followed where they go or don't go; in this way, Libby, Calvin, Taube and others used isotopes to elucidate mechanistic pathways for very different, yet important chemistries. Another important isotope method is the study of kinetic isotope effects (KIEs) and equilibrium isotope effect (EIEs). Here the mere observation of where a label winds up is no longer enough - what matters is how much slower (or faster) a labeled molecule reacts than the unlabeled material. The most careti studies essentially involve the measurement of isotope fractionation between a reference ground state and the transition state. Thus kinetic isotope effects provide unique data unavailable from other methods, since information about the transition state of a reaction is obtained. Because getting an experimental glimpse of transition states is really tantamount to understanding catalysis, kinetic isotope effects are very powerful.

Physical Description

62 pages

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Brookhaven National Laboratory, P.O. Box 5000, Upton, NY 11973-5000 (US); OSTI as DE00767154

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  • Other Information: PBD: 1 Dec 2000

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  • Report No.: BNL--67609
  • Report No.: KC030201
  • Grant Number: AC02-98CH10886
  • Office of Scientific & Technical Information Report Number: 767154
  • Archival Resource Key: ark:/67531/metadc723432

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • December 2000

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  • Sept. 29, 2015, 5:31 a.m.

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  • Nov. 9, 2015, 12:53 p.m.

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Bullock, R. M. & Bender, B. R. ISOTOPE METHODS IN HOMOGENEOUS CATALYSIS., book, December 2000; Upton, New York. (digital.library.unt.edu/ark:/67531/metadc723432/: accessed October 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.