Investigations Of Infra Red Spectra Pt Iii Infra Red Transmission Spectra Pt Iv Infra Red Reflection Spectra

Author : William W. Coblentz
Publisher : Forgotten Books
ISBN 13 : 9781334261114
Total Pages : 336 pages
Book Rating : 4.2/5 (611 download)

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Download or read book Investigations of Infra-Red Spectra written by William W. Coblentz and published by Forgotten Books. This book was released on 2016-11-13 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Investigations of Infra-Red Spectra: Part I. Infra-Red Absorption Spectra; Part II. Infra-Red Emission Spectra The free vibration periods of molecular aggregations may be studied by means of their emission or absorption spectra. Emission generally implies a high temperature and uncertainty of the composition of the radiator, due to dissociation; hence it is more advantageous to study a substance at a low temperature by means of its absorption spectrum, since we then have a more definite knowledge of its composition. This is especially true of the highly complex compounds which are so abun dant in organic chemistry. Although generally assumed that in gases the molecules have the advantage of a greater freedom of vibration, it will be shown in the present paper that, starting with a simple liquid or solid compound, the free vibration of a given molecule or radical is not always seriously modified as the molecular complexity of the compound is increased. In fact, it has been found that there may be two sets of particles (or ions which vibrate side by side, yet still retain the free period that they had when present, alone, in a simpler compound. Further more, their free vibration periods, manifested as absorption maxima, occasionally seem to repeat themselves harmonically throughout the spectrum investigated. This presence of groups of ions, each group having its own free period of vibration, is in accord with present ideas of absorption and anomalous dispersion. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.