Molecular refraction exaltation

Early work on the exaltation of the molecular refractivity of in-dazole and its 1- and 2-alkyl derivatives by Auwers and Diiesberg was considered to indicate that structure 18 represented the predomi-... 

The amino structure 173 was suggested for 5-aminoisoxazoles rather than the imino structure 174 on the basis of tentative chemical data and evidence from the exaltation of the molecular refractivity however, forms of type 175 were not taken into consideration in these... 

The molecular refraction of oxaziranes is in accordance with the values calculated from the individual refractions. For the isomeric nitrones, exaltation occurs. ... 

The epichlorohydrin is a colorless liquid with an odor much like that of ordinary epichlorohydrin and the following constants b. p. 152°, b. p.20 mm. 58-60°, dn 1.159, d 1.472. The usual exaltation of the molecular refraction was encountered. 

Exaltation. The amt by which the molecular refractivity of a compd exceeds the sum of the refractivities of its atoms it is an indication of constitution (presence of double bonds, etc)... 

Table LXXIV. Exaltation of Molecular Refraction for Molecules with Conjugated Double Bonds...

The exaltations of molecular refraction for a number of strongly polar substances are given in Table LXXVII and it would be of considerable interest to determine the influence of the resonance of the molecule on the exaltation. In certain cases the exaltation is very low, a fact which may be related to a small contribution from the ionic form. In general, however, the existing data... 

Briihl (1886a) had noted that the effect of unsaturation on molecular refraction could not always be represented by the increments previously deduced two olefinic bonds when situated conjugatively increased the refraction abnormally, the difference between observed and calculated R s being regarded as optical anomaly . In 1907 he introduced the terms optical exaltation and optical depression to refer respectively to cases where the observed R exceeded or fell short of that calculated numerically, depressions are commonly small but exaltations may be very large (see Smiles, 1910 von Auwers, 1924) ... 

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