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Infrared Spectra of Polynuclear Aromatic Compounds in the C-H Stretching and Out-of-Plane Bending Regions

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A study has been made of the infrared spectra of 33 poly-nuclear aromatic compounds including some known carcinogens. In most cases, the number of fused rings may be determined by measuring the frequency of the characteristic aromatic (C-H) stretching vibration with a LiF prism. For unsubstituted fused rings, the (C-H) stretching vibration shifts to lower frequencies as the number of fused rings increases. In addition, the position of the fused rings can be established from data obtained from the out-of-plane (C-H) bending vibrations in the range of 700 to 900 cm−1.
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Document Type: Research Article

Affiliations: Department of Chemistry, Rensselaer Polytechnic Institute, Troy, New York

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