Mason, S. F. published the artcile< Frequencies and intensities of the NH stretching vibrations in primary amines>, Name: Pyridazin-4-amine, the main research area is .
The positions, extinction coefficients, and band half-widths of the symmetric and antisymmetric stretching vibration absorptions of the amide anion, and some monocyclic aliphatic, aromatic, and N-heteroaromatic primary amines were measured in the 3-μ region. Approx. values for the force constants, HHH bond angles, the “”s”” character of the hybrid orbitals bonding N to H, and the NH bond dipole gradients were calculated from the results. The force constant and the NH bond dipole gradient increase linearly with the amount of “”s”” character of the hybrid orbitals of the NH group, and in the aromatic series, these quantities increase as the π-electron charge d. on the N atom of the amino-group falls. Compound, solvent, symmetric, and antisymmetric frequency (in cm.-1) and force constant (in dyne/cm.) given: LiNH2, KBr, 3315, 3261, 5.99; cyclohexylamine, CCl4, 3381, 3316, 6.21; PhNH2, CCl4, 3481, 3395, 6.54; 2-aminopyridine (I), CCl4, 3509, 3410, 6.62; 3 analog of I, CCl4, 3481, 3396, 6.54; 4 analog of I, CCl4, 3505, 3413, 6.62; 2-aminopyrimidine (II), CCl4, 3540, 3425, 6.72; 4,6-Me2-II, CHCl3, 3533, 3422, 6.69; 4 analog of II, CCl4, 3536, 3421, 6.70; 5 analog of II, CCl4, 3485, 3399, 6.56; 2-aminopyrazine, CCl4, 3511, 3410, 6.62; 3-amino-6-methylpyridazine, CHCl3, 3509, 3407, 6.62; 4-aminopyridazine, 3514, 3415, 6.64; 3-amino-1,2,4-triazine (III), 3533, 3420, 6.70; 5,6-Me2-III, 3534, 3423, 6.68.
Journal of the Chemical Society published new progress about Amines. 20744-39-2 belongs to class pyridazine, and the molecular formula is C4H5N3, Name: Pyridazin-4-amine.
Referemce:
Pyridazine – Wikipedia,
Pyridazine | C4H4N2 – PubChem