Zobrazeno 1 - 10
of 75
pro vyhledávání: '"E. Bright"'
Publikováno v:
The Journal of Chemical Physics. 60:1376-1385
The existence of two rotational isomers of ethyl nitrate (CH3CH2ONO2) has been confirmed by gas phase microwave spectroscopy. The isomers are designated trans and gauche to indicate the relative positions of the CH3‐ and ‐NO2 groups. In the trans
Autor:
E. Bright Wilson, L. Salem
Publikováno v:
The Journal of Chemical Physics. 36:3421-3427
A spherical atom in a uniform external field and the long‐range interaction of two molecules are examples which illustrate the unreliability of the Hellmann—Feynman theorem when applied to systems described by approximate wave functions or charge
Autor:
E. Bright Wilson
Publikováno v:
The Journal of Chemical Physics. 3:276-285
A general method is described for calculating the statistical weights (degeneracies) of the energy levels of polyatomic molecules. Wave functions for a molecule are assumed to be expressible as linear combinations of products of the electronic, vibra
Autor:
E. Bright Wilson, Frank Weinhold
Publikováno v:
The Journal of Chemical Physics. 46:2752-2758
Certain general features of the second‐order reduced density matrix, or 2 matrix, for configuration‐interaction (CI) wavefunctions are reviewed, with special reference to the simplifying features of spin singlet states. A restricted form of CI in
Autor:
E. Bright Wilson, P.S.C. Wang
Publikováno v:
Chemical Physics Letters. 15:400-403
Correlation diagrams using orbital symmetry analogous to those of Woodward and Hoffmann for classifying concerted chemical reactions can be drawn for exact wavefunctions. The occupation numbers of the natural orbitals will normally show crossing betw
Autor:
E. Bright Wilson, Francis J. Wodarczyk
Publikováno v:
The Journal of Chemical Physics. 56:166-176
The gas‐phase microwave spectrum of 1‐pentyne has been investigated in the region 8–40 GHz. The spectrum can be attributed to two rotational isomers in which the methyl group is, respectively, trans and gauche to the acetylene substituent. The
Autor:
Harold Gershinowitz, E. Bright Wilson
Publikováno v:
The Journal of Chemical Physics. 6:247-251
The infra‐red absorption spectra of gaseous cis‐ and transbutene‐2 have been measured with a prism spectrometer from 435 to 4000 cm—1. The Raman spectra of these compounds as liquids have also been obtained. The accepted identification of the
Autor:
E. Bright Wilson, Peter H. Verdier
Publikováno v:
The Journal of Chemical Physics. 29:340-347
A method is described for measuring the relative intensities of microwave absorption lines up to 80 mc. apart to within a few percent, using a Stark‐modulated resonant cavity absorption cell of novel design. Barriers to internal rotation in CH3CHO
Autor:
S. Golden, E. Bright Wilson
Publikováno v:
The Journal of Chemical Physics. 16:669-685
The Stark effect, arising from the interaction of a uniform electric field with a permanent electric dipole that is arbitrarily oriented within a rigid asymmetric rotor, and with a dipole induced in the rotor by the field, has been evaluated by pertu
Autor:
E. Bright Wilson
Publikováno v:
The Journal of Chemical Physics. 2:432-439
The number, degeneracies, and symmetries of the normal modes of vibration are given for molecules in which several atoms are bonded to a central atom. Ninety‐nine symmetries, including all possible structures with three to seven atoms and the more