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Polarizabilities of Trans and Cis Polyacetylene and Interactions Among Chains in Crystalline Polyacetylene.

Author: Z HuangD A JelskiR WangD XieC ZahoAll authors
Publisher: Ft. Belvoir : Defense Technical Information Center, AUG 1991.
Edition/Format:   eBook : English
Database:WorldCat
Summary:
In this paper, we use the semi-empirical Hartree-Fock method, introduced within the finite electric field perturbation approach, to calculate the molecular and pi-system polarizabilities of trans and cis polyene H( -CH=CH- ) nH (n = 3,4,5 ...,18). The result is that for a given n, the order of both molecular and pi-system polarizabilities of polyene is trans> cis. This result is consistent with the order of  Read more...
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Material Type: Internet resource
Document Type: Internet Resource
All Authors / Contributors: Z Huang; D A Jelski; R Wang; D Xie; C Zaho; WASHINGTON STATE UNIV PULLMAN Dept. of CHEMISTRY.
OCLC Number: 227772266
Notes: Technical rept.
Description: 21 pages ; 23 x 29 cm

Abstract:

In this paper, we use the semi-empirical Hartree-Fock method, introduced within the finite electric field perturbation approach, to calculate the molecular and pi-system polarizabilities of trans and cis polyene H( -CH=CH- ) nH (n = 3,4,5 ...,18). The result is that for a given n, the order of both molecular and pi-system polarizabilities of polyene is trans> cis. This result is consistent with the order of experimental values of trans and cis hexatriene. When the n increases from 3 to 18, the contribution of pi-system polarizability to the molecular polarizability increases from 45% to 70%. Using these results, we have extrapolated the polarizabilities of both trans and cis polyacetylene. The order is trans> cis. These results and crystal parameters lead to an estimate of the dispersion energies among polyacetylene chains. The result is also E sub disp (trans)> E sub disp (cis).

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   schema:about <http://experiment.worldcat.org/entity/work/data/137446337#Thing/polyacetylene> ; # POLYACETYLENE
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   schema:about <http://experiment.worldcat.org/entity/work/data/137446337#Topic/polarization> ; # Polarization
   schema:about <http://experiment.worldcat.org/entity/work/data/137446337#Topic/chains> ; # Chains
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   schema:about <http://experiment.worldcat.org/entity/work/data/137446337#Topic/crystals> ; # Crystals
   schema:about <http://experiment.worldcat.org/entity/work/data/137446337#Topic/molecules> ; # Molecules
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   schema:description "In this paper, we use the semi-empirical Hartree-Fock method, introduced within the finite electric field perturbation approach, to calculate the molecular and pi-system polarizabilities of trans and cis polyene H( -CH=CH- ) nH (n = 3,4,5 ...,18). The result is that for a given n, the order of both molecular and pi-system polarizabilities of polyene is trans> cis. This result is consistent with the order of experimental values of trans and cis hexatriene. When the n increases from 3 to 18, the contribution of pi-system polarizability to the molecular polarizability increases from 45% to 70%. Using these results, we have extrapolated the polarizabilities of both trans and cis polyacetylene. The order is trans> cis. These results and crystal parameters lead to an estimate of the dispersion energies among polyacetylene chains. The result is also E sub disp (trans)> E sub disp (cis)."@en ;
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