Dipole moments of terminal diacetylenes in the gaseous phase

H. J.G. Hayman; Shmuel Weiss

doi:10.1063/1.1695783

Dipole moments of terminal diacetylenes in the gaseous phase

H. J.G. Hayman, Shmuel Weiss

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Abstract

The dipole moments of four terminal diacetylenes and three terminal monoacetylenes were measured in the gaseous phase at 35°C using a high-precision heterodyne beat apparatus. The results obtained were interpreted in terms of primary and induced bond moments on the assumption that the above compounds exist as equilibrium mixtures of rotational isomers corresponding to Irans and gauche conformations of the various C-C bonds. The composition of these equilibrium mixtures of rotational isomers was assumed to depend on a single parameter expressing the relative stability of gauche and trans conformations. The value of this parameter found from our results agreed satisfactorily with the results obtained by Kartell and Kohl from electron-diffraction measurements on n-paraffins.

Original language	English
Pages (from-to)	3701-3706
Number of pages	6
Journal	Journal of Chemical Physics
Volume	42
Issue number	10
DOIs	https://doi.org/10.1063/1.1695783
State	Published - 1 Jan 1965
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy
Physical and Theoretical Chemistry

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abstract = "The dipole moments of four terminal diacetylenes and three terminal monoacetylenes were measured in the gaseous phase at 35°C using a high-precision heterodyne beat apparatus. The results obtained were interpreted in terms of primary and induced bond moments on the assumption that the above compounds exist as equilibrium mixtures of rotational isomers corresponding to Irans and gauche conformations of the various C-C bonds. The composition of these equilibrium mixtures of rotational isomers was assumed to depend on a single parameter expressing the relative stability of gauche and trans conformations. The value of this parameter found from our results agreed satisfactorily with the results obtained by Kartell and Kohl from electron-diffraction measurements on n-paraffins.",

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AU - Hayman, H. J.G.

AU - Weiss, Shmuel

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N2 - The dipole moments of four terminal diacetylenes and three terminal monoacetylenes were measured in the gaseous phase at 35°C using a high-precision heterodyne beat apparatus. The results obtained were interpreted in terms of primary and induced bond moments on the assumption that the above compounds exist as equilibrium mixtures of rotational isomers corresponding to Irans and gauche conformations of the various C-C bonds. The composition of these equilibrium mixtures of rotational isomers was assumed to depend on a single parameter expressing the relative stability of gauche and trans conformations. The value of this parameter found from our results agreed satisfactorily with the results obtained by Kartell and Kohl from electron-diffraction measurements on n-paraffins.

AB - The dipole moments of four terminal diacetylenes and three terminal monoacetylenes were measured in the gaseous phase at 35°C using a high-precision heterodyne beat apparatus. The results obtained were interpreted in terms of primary and induced bond moments on the assumption that the above compounds exist as equilibrium mixtures of rotational isomers corresponding to Irans and gauche conformations of the various C-C bonds. The composition of these equilibrium mixtures of rotational isomers was assumed to depend on a single parameter expressing the relative stability of gauche and trans conformations. The value of this parameter found from our results agreed satisfactorily with the results obtained by Kartell and Kohl from electron-diffraction measurements on n-paraffins.

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JO - Journal of Chemical Physics

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Dipole moments of terminal diacetylenes in the gaseous phase

Abstract

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