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

using model chemistry: CCSD/cc-pVTZ

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/cc-pVTZ
 hartrees
Energy at 0K-225.786311
Energy at 298.15K-225.792333
HF Energy-224.895126
Nuclear repulsion energy163.629330
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/cc-pVTZ
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' 3726 3507 72.71      
2 A' 3314 3119 1.22      
3 A' 3286 3092 0.16      
4 A' 3284 3091 4.58      
5 A' 1595 1501 11.99      
6 A' 1544 1453 18.56      
7 A' 1476 1390 18.93      
8 A' 1394 1312 6.86      
9 A' 1306 1230 0.51      
10 A' 1173 1104 7.66      
11 A' 1165 1096 1.37      
12 A' 1115 1049 11.83      
13 A' 1092 1028 39.65      
14 A' 952 896 1.48      
15 A' 916 862 6.86      
16 A" 896 843 1.81      
17 A" 862 811 29.45      
18 A" 757 713 42.56      
19 A" 687 647 5.78      
20 A" 651 613 8.64      
21 A" 506 476 92.95      

Unscaled Zero Point Vibrational Energy (zpe) 15847.6 cm-1
Scaled (by 0.9412) Zero Point Vibrational Energy (zpe) 14915.8 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 CCSD/cc-pVTZ
ABC
0.32714 0.31496 0.16047

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 1.105 0.000
C2 -1.083 0.281 0.000
C3 1.116 0.297 0.000
N4 -0.745 -0.981 0.000
C5 0.636 -0.982 0.000
H6 -0.012 2.106 0.000
H7 -2.091 0.661 0.000
H8 2.114 0.696 0.000
H9 1.196 -1.900 0.000

Atom - Atom Distances (Å)
  N1 C2 C3 N4 C5 H6 H7 H8 H9
N11.36101.37812.21502.18131.00152.13742.15293.2339
C21.36102.19981.30662.13312.11631.07693.22393.1547
C31.37812.19982.25811.36602.13253.22791.07422.1980
N42.21501.30662.25811.38113.17312.12333.31452.1479
C52.18132.13311.36601.38113.15533.18352.23581.0755
H61.00152.11632.13253.17313.15532.53152.55134.1842
H72.13741.07693.22792.12333.18352.53154.20484.1671
H82.15293.22391.07423.31452.23582.55134.20482.7530
H93.23393.15472.19802.14791.07554.18424.16712.7530

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 112.252 N1 C2 H7 122.067
N1 C3 C5 105.295 N1 C3 H8 122.304
C2 N1 C3 106.857 C2 N1 H6 126.547
C2 N4 C5 105.028 C3 N1 H6 126.596
C3 C5 N4 110.568 C3 C5 H9 127.994
N4 C2 H7 125.681 N4 C5 H9 121.438
C5 C3 H8 132.402
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability