Abstract
Abstract The fundamental grounds of the experimental method for measuring the intensities of infra-red absorption bands have been revised and some general conclusions about the reliability of intensity determinations in gases have been drawn. The most important sources of error in these measurements are examined. The behaviour of the apparent intensity as a function of the product pl (pressure of the gas times cell length) when pl → 0 is discussed. The intensities of the fundamental infra-red absorption bands lying above 400 cm−1 of CHF3 and CHCl3 have been measured using the pressure-broadening technique. Bond moments and their derivatives are calculated and the results are briefly discussed.
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