University of Chicago Laboratory of Molecular Structure and Spectra Technical Report: 1968 Page: 203
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90
Torsional angleFIGURE 4.
Hickel-method theoretically computed orbital energies (in eV)
of the ground states of C2H4 (below) and C2H4 (above), as func-
tions of the torsional angle. Full line curves are for what
are believed to be the best parameter values used
(0* = 2P, 6 = 0, P = -3 eV); dot-dash curves are for the case
of no hyperconjugation; dashed curves are for B" = 1.5 B,
6 = P, P = -3 eV. From unpublished work of Mulliken and
Roothaan (see Ref. 26).203
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University of Chicago. Laboratory of Molecular Structure and Spectra. University of Chicago Laboratory of Molecular Structure and Spectra Technical Report: 1968, report, 1969~; Chicago, Illinois. (https://digital.library.unt.edu/ark:/67531/metadc228352/m1/215/?q=green+energy: accessed July 18, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.