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Full set of Notes with Fill-Ins - San Jose State University

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Chem 155 Unit 13 Page 234 <strong>of</strong> 316Infrared Spectrometry:Selection Rules, Normal Modes and GroupFrequenciesSkoog Chapters Covered:16A all, 16B – Sources and Transducers16C-1, FT-<strong>Ins</strong>trumentsRough overview <strong>of</strong> the optical spectroscopy ranges:λ (nm) ν (cm -1 ) T (K) Designation Phenomena100 100,000 140,000 UV σ-σ*, n-σ*,VISn-π*, π-π*Valence electronexcitation1,000 10,000 14,000 Near IR low-E electronicHi-E vibrationsOH, C≡O, NHMid IR GroupFrequencies10,000 1,000 1,400 FingerprintInorganics,High-Z, Low-kFar IRLattice vibration,Pure rotations100,000 100 140μ-wave1,000,000 10 14Page 234 <strong>of</strong> 316

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