A system of physical chemistry - Index of

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A system of physical chemistry - Index of

2 00 A SYSTEM OF PHYSICAL CHEMISTRY

independent of the temperature if it be due to precessional vibrations.

According to von Bahr the product X, x is ^T a constant, where A,, is

the rotational wave-length and is given by—

^ 2A1X2

Ai - A2

when Aj and A2 are the two wave-lengths of the double-headed band.

von Bahr's relation is to be expected if a rotation accompanied by

the amount of energy assumed on the classical mechanics were present

(cf. Chap. IV.).

It is to be remarked at the same time that with very

energetic precessional vibrations the angle

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