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All results from a given calculation for C3H4N2 (1H-Imidazole)

using model chemistry: QCISD/aug-cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at QCISD/aug-cc-pVDZ
 hartrees
Energy at 0K-225.621498
Energy at 298.15K-225.627451
HF Energy-224.845327
Nuclear repulsion energy161.950850
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/aug-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 A' 3693 3578 64.05      
2 A' 3303 3200 1.42      
3 A' 3277 3175 0.57      
4 A' 3275 3172 3.66      
5 A' 1572 1523 9.06      
6 A' 1519 1472 24.31      
7 A' 1461 1416 19.40      
8 A' 1374 1331 6.02      
9 A' 1281 1241 0.30      
10 A' 1154 1117 7.55      
11 A' 1147 1111 1.58      
12 A' 1099 1064 12.14      
13 A' 1073 1040 38.41      
14 A' 937 908 1.62      
15 A' 900 871 5.51      
16 A" 860 833 1.35      
17 A" 833 807 38.05      
18 A" 733 710 46.46      
19 A" 671 650 3.88      
20 A" 633 613 10.99      
21 A" 497 482 88.34      

Unscaled Zero Point Vibrational Energy (zpe) 15645.7 cm-1
Scaled (by 0.9687) Zero Point Vibrational Energy (zpe) 15156.0 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/aug-cc-pVDZ
ABC
0.32035 0.30867 0.15720

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 1.113 0.000
C2 -1.096 0.285 0.000
C3 1.128 0.302 0.000
N4 -0.752 -0.992 0.000
C5 0.641 -0.991 0.000
H6 -0.013 2.123 0.000
H7 -2.114 0.670 0.000
H8 2.137 0.707 0.000
H9 1.209 -1.920 0.000

Atom - Atom Distances (Å)
  N1 C2 C3 N4 C5 H6 H7 H8 H9
N11.37291.38942.23482.19941.01032.16032.17533.2646
C21.37292.22391.32302.15572.13251.08873.26023.1899
C31.38942.22392.28191.38152.14933.26341.08732.2229
N42.23481.32302.28191.39293.20112.14893.35132.1692
C52.19942.15571.38151.39293.18203.21742.26301.0884
H61.01032.13252.14933.20113.18202.55472.57464.2233
H72.16031.08873.26342.14893.21742.55474.25164.2131
H82.17533.26021.08733.35132.26302.57464.25162.7858
H93.26463.18992.22292.16921.08844.22334.21312.7858

picture of 1H-Imidazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 N4 111.974 N1 C2 H7 122.290
N1 C3 C5 105.074 N1 C3 H8 122.403
C2 N1 C3 107.241 C2 N1 H6 126.298
C2 N4 C5 105.043 C3 N1 H6 126.461
C3 C5 N4 110.669 C3 C5 H9 127.918
N4 C2 H7 125.736 N4 C5 H9 121.413
C5 C3 H8 132.524
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability