13) The partial charge for the H atom has been adjusted to give a rough match to the typical dipole strengths found for aliphatic CH stretching vibrations; cf. T. R. Faulkner, Ph.D. Thesis, University of Minnesota, 1976. (14) D. F. Burow, private communication. (15) The dipole strength, D (in cgs units of esu2cm2), is related to the infrared intensity A (In km/mol) by A = 2.5066 X 1036 D v, where v Is in cm-1. ( 16) This limit of about 2000 cm-1 arises through the need to employ fast detectors with a high signal to noise ratio. Most of our own measurements to date have been made with a photovoltaic InSb detector which has a 5.5-µ cutoff. The problems with signal to noise ratio are more difficult at longer wavelengths and it is doubtful that a G value less than 10~4 could be measured at this time. (17) The calculation for a seven-atom molecule requires a computer with a core memory of 145K, 64-bit words.

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