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The infrared absorption spectra of thiosemicarbazide and related compounds: NH<sub>2</sub> and NH vibrations
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1969
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EngineeringAbsorption SpectroscopyOrganic ChemistryChemistryRelated CompoundsSpectroscopic PropertySpectra-structure CorrelationMolecular SpectroscopyBiophysicsInfrared Absorption SpectraInorganic ChemistryInfrared SpectroscopyPhysical ChemistryAldehyde ThiosemicarbazonesQuantum ChemistryNatural SciencesSpectroscopyRelated StructuresNh VibrationsN-methyl Derivatives
In the infrared absorption spectra of thiosemicarbazide (I), aldehyde thiosemicarbazones (II), and N-methyl derivatives of these compounds, the following assignments are proposed: ν a (N d H 2 ) absorbs in the vicinity of 3400 cm −1 ; N a H 2 vibrations are observed in the region of 1630 cm −1 ; there is a significant contribution from ν(N b H) at or near 3170 cm −1 . These conclusions probably apply to other thioamides and amides having related structures.