Review Article
Growth and PhysioChemical Properties of Second-Order Nonlinear Optical L-Threonine Single Crystals
Table 7
Deuterated and undeuterated L-threonine assignments on IR bands.
| Wavenumber (c) | | Undeuterated | Deuterated | Assignments |
| 3157, 3021 | | N–H stretch | 2975 | 2975 | C–H stretching | | 2341, 2873 | Symmetric stretching of C | | 2250 | Symmetric stretching of O–D | | 2158 | Stretching of N | 2050 | | Degenerative deformation of N and torsional vibration of N | 1623 | | Asymmetric stretching of CO | 1481 | | Symmetric bending of N | | 1616 | Asymmetric stretching | 1455 | | Degenerative deformation of C | | 1457 | Degenerative deformation of C | 1417 | | Symmetric stretching of C | | 1417 | Symmetric stretching of CO | | 1383 | Symmetric deformation of C | | 1358 | C–O stretching | 1246, 1318, 1346 | 1329 | In-plane deformation of C–C–H | 1184 | | N rocking | | 1102, 1157, 1182 | Degenerate deformation of N | 1109 | | Rocking vibration of C | | 1048, 1246 | Rocking of C group | 931 | | C–C stretching | | 933 | N rocking | 767 | | Out-of-plane bending vibration of C | | 711 | Wagging of C | 701 | | In-plane deformation of CO | | 701 | Wagging of C | | 550, 667 | Out-of-plane bending vibration of OD | 489 | 535 | C rocking |
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