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122:, the minimum energy to produce a 360-degree bond rotation of a molecular substructure. The three hydrogens at each end are free to pinwheel about the central carbon-carbon bond, provided that there is sufficient energy to overcome the barrier of the carbon-hydrogen bonds at each end of the molecule bumping into each other by way of overlap (exchange) repulsion.
197:. Russell M. Pitzer served as a trustee of Pitzer College from 1988 to 2012, and in 2003 received a Doctor of Humane Letters honorary degree in recognition of this service. In 2018 the Ohio Supercomputer Center named their newly purchased supercomputer Pitzer in honor of his role in founding the center.
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His group wrote computer software to enable calculation of molecular energies and other properties. In 1979, with John Yates, he published the first Jahn-Teller-Effect study (on
174:. During 2001–03 he served as Interim Director of the Ohio Supercomputer Center. In 2004 he received the Faculty Award For Distinguished University Service. He retired in 2008.
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Stevens, RM, Pitzer, RM, and
Lipscomb, WN. Perturbed Hartree–Fock Calculations. I. Magnetic Susceptibility and Shielding in the LiH Molecule.
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Chang AHH and Pitzer RM, "Electronic
Structure and Spectra of Uranocene". "J. Am. Chem. Soc., 2500-2507 (1989)
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Ethane barrier to rotation about the carbon-carbon bond, first accurately calculated by Pitzer and
Lipscomb.
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equations in a form for calculating the effects of external electric and magnetic fields on molecules.
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Yates JM and Pitzer, RM, Molecular and electronic structures of transition metal trifluorides".
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in 1968. He was promoted to
Professor in 1979 and served as Department Chair from 1989 to 1994.
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barrier (see diagram at right) was first calculated accurately by Pitzer and
Lipscomb using
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Pitzer, RM and
Lipscomb, WN, "Calculation of the Barrier to Internal Rotation in Ethane",
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and attended public schools in this and the
Washington, D.C. area. He received his
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During 1986–87 he served as Acting
Associate Director of the
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Also at
Harvard, Pitzer also helped formulate the perturbed
244:. Reading, Massachusetts: Addison-Wesley. pp. 398–401.
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Pitzer RM, "The barrier to internal rotation in ethane".
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Shavitt, Isaiah (2009). "Tribute to
Russell M. Pitzer".
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His father was former Stanford University president
118:. Ethane gives a classic, simple example of such a
298:(45, Russell M. Pitzer Festschrift): 12339–12341.
242:The Electronic Structure of Atoms and Molecules
116:Hartree Fock Self-Consistent Field (SCF) theory
361:Massachusetts Institute of Technology fellows
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144:before joining the Chemistry Department at
88:in cooperation with the research group of
381:California Institute of Technology alumni
16:American theoretical chemist and educator
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96:to develop computer programs to use
22:(born May 10, 1938) is an American
47:California Institute of Technology
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396:People from Berkeley, California
170:, cofounding the center and the
240:Schaefer III, Henry F. (1972).
172:Ohio Academic Resources Network
84:At Harvard, Pitzer worked with
391:20th-century American chemists
371:21st-century American chemists
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366:Ohio State University faculty
333:Pitzer bio on OSUChem website
102:self-consistent field (SCF)
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401:Scientists from California
356:Harvard University alumni
168:Ohio Supercomputer Center
140:and a faculty member at
86:William N. Lipscomb, Jr.
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181:and his grandfather,
146:Ohio State University
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20:Russell Mosher Pitzer
376:Theoretical chemists
228:Accts. Chem. Res. 16
35:Berkeley, California
304:2009JPCA..11312339S
189:, one of the seven
24:theoretical chemist
271:, 4049-4055 (1979)
217:, 1995–2004 (1963)
215:J. Chem. Phys., 39
191:Claremont Colleges
153:cobalt trifluoride
120:rotational barrier
105:molecular orbitals
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71:Harvard University
59:Harvard University
312:10.1021/jp9085393
269:J. Chem. Phys. 70
258:, 550-560 (1963).
256:J. Chem. Phys. 38
183:Russell K. Pitzer
61:in 1963, and his
45:in 1959 from the
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386:1938 births
100:to produce
345:Categories
201:References
195:California
185:, founded
136:fellow at
161:uranocene
132:He was a
73:in 1963.
43:chemistry
320:19888767
28:educator
300:Bibcode
142:Caltech
55:physics
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138:M.I.T.
112:ethane
94:M.I.T.
49:, his
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63:Ph.D.
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316:PMID
110:The
51:A.M.
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26:and
308:doi
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