Studies on Structural, Spectral, and Optical Properties of Organic Nonlinear Optical Single Crystal: 2-Amino-4,6-dimethylpyrimidinium p-Hydroxybenzoate

Table 1

FTIR frequency assignments of ADPHB.

Functional group assignments	ADPHB sample
O–H phenolic stretching	3476
N–H primary amines	3292
C–H stretching	3065
O–H carboxylic stretching	2969 and 2926
C=N stretching	1628
C=O carbonyl stretching	1681
N–H bend primary amines	1595
C–N stretch in aromatic amines	1366
C–H bending	853, 830, and 777