Open Access

Table C.1

Relative energy ΔE+ZPE (kcal mol−1) of selected isomers by series (A, B, C, D) using different basis sets with including or not diffuse atomic functions: (B0, B1, B2, B3). Dipole moments μ are in Debye.

# Selected DFT(B0) μ DFT(B1) μ DFT(B2) μ DFT(B3) μ
isomers ΔEZPE ΔEZPE ΔEZPE ΔEZPE
A: CH4N2
1 (Z)-HN=CH-NH2 0.0 2.60 0.00 2.81 0.00 2.69 0.00 2.74
2 H3N-HCN 2.70 5.83 4.32 5.70 4.88 5.63 5.53 5.57
3 (E)-HN=CH-NH2 1.40 3.54 1.93 3.69 1.78 3.53 1.93 3.55

B: C2N2
1 NCCN 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
2 CNCN 23.43 0.81 23.33 0.71 23.63 0.76 22.67 0.83
3 CNNC 70.31 0.00 70.60 0.00 68.89 0.00 68.84 0.00

C: C2H2N2
1 (Z)-NC-CH=NH 0.00 1.35 0.00 1.33 0.00 1.45 0.00 1.45
2 (E)-NC-CH=NH 0.63 4.15 0.32 4.27 0.51 4.15 0.44 4.15
3 H2C=N-CN 4.50 4.41 4.80 4.47 4.65 4.52 4.70 4.55

D: C3H2N2
1 NC-CH2-CN 0.00 3.75 0.00 3.88 0.00 3.83 0.00 3.84
2 NC-CH=C=NH 12.63 4.63 12.74 4.64 11.92 4.60 11.80 4.61
3 NC−CC−NH2 23.15 6.64 22.37 6.70 22.10 6.64 21.85 6.64

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