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All results from a given calculation for C3H4N2 (2H-Imidazole)

using model chemistry: QCISD/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at QCISD/cc-pVDZ
 hartrees
Energy at 0K-225.481099
Energy at 298.15K-225.487095
HF Energy-224.740239
Nuclear repulsion energy165.716587
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at QCISD/cc-pVDZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3264 3132 11.05      
2 A1 3111 2984 1.41      
3 A1 1752 1681 23.38      
4 A1 1446 1388 1.10      
5 A1 1408 1351 14.56      
6 A1 1277 1225 3.68      
7 A1 1041 998 1.62      
8 A1 931 893 16.29      
9 A2 1162 1115 0.00      
10 A2 904 868 0.00      
11 A2 534 512 0.00      
12 B1 3165 3037 0.36      
13 B1 1026 984 21.46      
14 B1 824 791 6.14      
15 B1 345 331 32.52      
16 B2 3249 3117 6.86      
17 B2 1803 1730 0.00      
18 B2 1433 1375 42.51      
19 B2 1250 1199 3.04      
20 B2 1096 1051 26.55      
21 B2 937 899 66.15      

Unscaled Zero Point Vibrational Energy (zpe) 15978.5 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 15329.8 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at QCISD/cc-pVDZ
ABC
0.35891 0.29956 0.16865

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/cc-pVDZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.212
N2 0.000 0.998 0.283
N3 0.000 -0.998 0.283
C4 0.000 0.735 -0.953
C5 0.000 -0.735 -0.953
H6 -0.903 0.000 1.844
H7 0.903 0.000 1.844
H8 0.000 1.494 -1.739
H9 0.000 -1.494 -1.739

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.36351.36352.28682.28681.10201.10203.30833.3083
N21.36351.99501.26362.12802.06102.06102.08203.2090
N31.36351.99502.12801.26362.06102.06103.20902.0820
C42.28681.26362.12801.46943.02963.02961.09312.3637
C52.28682.12801.26361.46943.02963.02962.36371.0931
H61.10202.06102.06103.02963.02961.80653.98583.9858
H71.10202.06102.06103.02963.02961.80653.98583.9858
H83.30832.08203.20901.09312.36373.98583.98582.9890
H93.30833.20902.08202.36371.09313.98583.98582.9890

picture of 2H-Imidazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C4 120.977 C1 N3 C5 120.977
N2 C1 N3 94.036 N2 C1 H6 112.992
N2 C1 H7 112.992 N2 C4 C5 102.005
N2 C4 H8 123.964 N3 C1 H6 112.992
N3 C1 H7 112.992 N3 C5 C4 102.005
N3 C5 H9 123.964 C4 C5 H9 134.032
C5 C4 H8 134.032 H6 C1 H7 110.090
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability