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

using model chemistry: CCSD/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at CCSD/6-31G*
 hartrees
Energy at 0K-225.445969
Energy at 298.15K-225.451967
HF Energy-224.723518
Nuclear repulsion energy166.316290
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/6-31G*
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 3273 3091 11.39      
2 A1 3107 2934 0.64      
3 A1 1762 1664 23.33      
4 A1 1485 1402 5.64      
5 A1 1435 1356 10.37      
6 A1 1285 1214 3.80      
7 A1 1062 1003 1.32      
8 A1 955 902 14.91      
9 A2 1174 1109 0.00      
10 A2 881 832 0.00      
11 A2 538 508 0.00      
12 B1 3154 2979 0.48      
13 B1 1045 987 20.37      
14 B1 822 776 7.70      
15 B1 356 336 38.80      
16 B2 3259 3077 8.25      
17 B2 1819 1718 0.13      
18 B2 1445 1364 30.69      
19 B2 1273 1202 1.92      
20 B2 1105 1044 33.06      
21 B2 947 894 66.80      

Unscaled Zero Point Vibrational Energy (zpe) 16091.2 cm-1
Scaled (by 0.9443) Zero Point Vibrational Energy (zpe) 15195.0 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 CCSD/6-31G*
ABC
0.36170 0.30172 0.16989

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.209
N2 0.000 0.997 0.281
N3 0.000 -0.997 0.281
C4 0.000 0.728 -0.950
C5 0.000 -0.728 -0.950
H6 -0.898 0.000 1.837
H7 0.898 0.000 1.837
H8 0.000 1.477 -1.735
H9 0.000 -1.477 -1.735

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.36171.36172.27762.27761.09591.09593.29303.2930
N21.36171.99471.26002.11962.05422.05422.07233.1918
N31.36171.99472.11961.26002.05422.05423.19182.0723
C42.27761.26002.11961.45633.01653.01651.08502.3409
C52.27762.11961.26001.45633.01653.01652.34091.0850
H61.09592.05422.05423.01653.01651.79633.96763.9676
H71.09592.05422.05423.01653.01651.79633.96763.9676
H83.29302.07233.19181.08502.34093.96763.96762.9543
H93.29303.19182.07232.34091.08503.96763.96762.9543

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 120.575 C1 N3 C5 120.575
N2 C1 N3 94.180 N2 C1 H6 112.965
N2 C1 H7 112.965 N2 C4 C5 102.335
N2 C4 H8 124.014 N3 C1 H6 112.965
N3 C1 H7 112.965 N3 C5 C4 102.335
N3 C5 H9 124.014 C4 C5 H9 133.652
C5 C4 H8 133.652 H6 C1 H7 110.073
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability