Growth and PhysioChemical Properties of Second-Order Nonlinear Optical L-Threonine Single Crystals

Table 3

Bands assignments of IR and Raman spectra of L-threonine.

Wavenumber (cm^−1)
IR	Raman	Assignments
3157, 3021	3024	N–H stretch
	2944	Asymmetric stretching of CH3
2975	2935	C–H stretching
	2879	Symmetric stretching of CH3
2050		Degenerative deformation of NH3^+ and
		torsional vibration of NH3^+
1623	1645	Asymmetric stretching of CO2^−
1481	1544	Bending vibration of NH3^+
1455		Degenerative deformation of CH3
	1454	Bending vibration of CH3
1417	1423	Symmetric stretching of CO2
1246, 1318, 1346		In plane deformation of C–C–H
	1308	Stretching of C–O and bending of O–H
1184		NH3^+ rocking
1109	1101, 1045	CH3 rocking vibration
931		C–C stretching
	877	C–C–N vibration
767		Out of plane bending vibration of CO2^−
701		In plane deformation of CO2^−
	704	Bending vibration of CO2
489	570	CO2 rocking
	449	Torsion vibration of NH3^+