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

using model chemistry: CCSD/6-31G(2df,p)

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(2df,p)
 hartrees
Energy at 0K-225.598041
Energy at 298.15K-225.604079
HF Energy-224.748109
Nuclear repulsion energy166.740795
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(2df,p)
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 3286 3107 9.05      
2 A1 3124 2953 0.42      
3 A1 1756 1661 25.01      
4 A1 1459 1379 4.45      
5 A1 1419 1342 12.10      
6 A1 1271 1202 3.05      
7 A1 1051 994 1.51      
8 A1 948 896 15.15      
9 A2 1180 1116 0.00      
10 A2 933 882 0.00      
11 A2 547 517 0.00      
12 B1 3171 2999 0.00      
13 B1 1041 984 19.37      
14 B1 840 794 4.11      
15 B1 360 340 35.35      
16 B2 3271 3093 4.84      
17 B2 1813 1714 0.19      
18 B2 1428 1351 30.14      
19 B2 1270 1201 2.56      
20 B2 1100 1040 30.59      
21 B2 945 894 67.04      

Unscaled Zero Point Vibrational Energy (zpe) 16106.8 cm-1
Scaled (by 0.9455) Zero Point Vibrational Energy (zpe) 15229.0 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(2df,p)
ABC
0.36168 0.30436 0.17068

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/6-31G(2df,p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.204
N2 0.000 0.997 0.280
N3 0.000 -0.997 0.280
C4 0.000 0.730 -0.945
C5 0.000 -0.730 -0.945
H6 -0.895 0.000 1.829
H7 0.895 0.000 1.829
H8 0.000 1.473 -1.728
H9 0.000 -1.473 -1.728

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.35961.35962.26922.26921.09171.09173.28143.2814
N21.35961.99421.25342.11682.04862.04862.06363.1834
N31.35961.99422.11681.25342.04862.04863.18342.0636
C42.26921.25342.11681.45933.00493.00491.08012.3380
C52.26922.11681.25341.45933.00493.00492.33801.0801
H61.09172.04862.04863.00493.00491.78953.95323.9532
H71.09172.04862.04863.00493.00491.78953.95323.9532
H83.28142.06363.18341.08012.33803.95323.95322.9463
H93.28143.18342.06362.33801.08013.95323.95322.9463

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 120.504 C1 N3 C5 120.504
N2 C1 N3 94.346 N2 C1 H6 112.925
N2 C1 H7 112.925 N2 C4 C5 102.323
N2 C4 H8 124.175 N3 C1 H6 112.925
N3 C1 H7 112.925 N3 C5 C4 102.323
N3 C5 H9 124.175 C4 C5 H9 133.502
C5 C4 H8 133.502 H6 C1 H7 110.079
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability