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- W2158982543 abstract "The first part of this paper is concerned with the measurement of molecular extinction coefficients in the infra-red region of the spectrum, using both single-pass and double-pass prism spectrometers of conventional design. The absolute accuracy of such measurements cannot be evaluated at present, as suitable reference standards are not available. Several factors are discussed which must be taken into consideration before such standards can be established. The second part of the paper deals with the molecular extinction coefficients of the principal absorption bands in the spectra of the homologous series of n-paraffin hydrocarbons from hexane to hexatriacontane. The values of ϵ(a)max, when plotted against the number of methylene groups in the chain, yield linear graphs with positive slopes. The significance of these slopes, and of the intercepts of the lines with the zero ordinate axis are considered in relationship to the vibrational assignments of the bands. Particular interest is attached to the region between 1490 and 1440 cm−1. An analysis of the band envelope indicates the presence of a third peak near 1460 cm−1, in addition to the well-established methylene and methyl bands at 1467 and 1457 cm−1." @default.
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- W2158982543 date "1957-01-01" @default.
- W2158982543 modified "2023-10-16" @default.
- W2158982543 title "The intensities of the infra-red absorption bands of n-paraffin hydrocarbons" @default.
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- W2158982543 doi "https://doi.org/10.1016/0371-1951(57)80137-4" @default.
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