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

using model chemistry: CCSD(T)/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 CCSD(T)/cc-pVDZ
 hartrees
Energy at 0K-225.611746
Energy at 298.15K-225.617636
HF Energy-224.831509
Nuclear repulsion energy161.710601
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 CCSD(T)/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' 3673 3595        
2 A' 3290 3220        
3 A' 3264 3195        
4 A' 3259 3190        
5 A' 1557 1524        
6 A' 1519 1486        
7 A' 1463 1432        
8 A' 1366 1337        
9 A' 1270 1243        
10 A' 1161 1137        
11 A' 1140 1116        
12 A' 1091 1068        
13 A' 1071 1049        
14 A' 928 908        
15 A' 894 875        
16 A" 838 820        
17 A" 805 788        
18 A" 709 694        
19 A" 671 657        
20 A" 632 618        
21 A" 470 460        

Unscaled Zero Point Vibrational Energy (zpe) 15535.2 cm-1
Scaled (by 0.9788) Zero Point Vibrational Energy (zpe) 15205.9 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 CCSD(T)/cc-pVDZ
ABC
0.32128 0.30610 0.15675

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 1.115 0.000
C2 -1.094 0.283 0.000
C3 1.129 0.307 0.000
N4 -0.752 -1.000 0.000
C5 0.639 -0.991 0.000
H6 -0.014 2.129 0.000
H7 -2.116 0.670 0.000
H8 2.139 0.719 0.000
H9 1.213 -1.920 0.000

Atom - Atom Distances (Å)
  N1 C2 C3 N4 C5 H6 H7 H8 H9
N11.37421.38782.24422.20031.01412.16212.17493.2681
C21.37422.22291.32792.15112.13851.09253.26193.1901
C31.38782.22292.29021.38712.15003.26471.09062.2288
N42.24421.32792.29021.39123.21452.15613.36282.1697
C52.20032.15111.38711.39123.18703.21692.27381.0922
H61.01412.13852.15003.21453.18702.55882.57294.2305
H72.16211.09253.26472.15613.21692.55884.25474.2177
H82.17493.26191.09063.36282.27382.57294.25472.7964
H93.26813.19012.22882.16971.09224.23054.21772.7964

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 112.301 N1 C2 H7 122.034
N1 C3 C5 104.919 N1 C3 H8 122.248
C2 N1 C3 107.187 C2 N1 H6 126.467
C2 N4 C5 104.555 C3 N1 H6 126.347
C3 C5 N4 111.039 C3 C5 H9 127.647
N4 C2 H7 125.664 N4 C5 H9 121.315
C5 C3 H8 132.833
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability