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

using model chemistry: CCSD(T)=FULL/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(T)=FULL/6-31G*
 hartrees
Energy at 0K-225.496331
Energy at 298.15K-225.502283
HF Energy-224.722584
Nuclear repulsion energy166.084722
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)=FULL/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 3253 3158        
2 A1 3086 2995        
3 A1 1720 1669        
4 A1 1470 1427        
5 A1 1420 1378        
6 A1 1276 1239        
7 A1 1051 1020        
8 A1 943 916        
9 A2 1163 1129        
10 A2 855 830        
11 A2 526 511        
12 B1 3133 3042        
13 B1 1031 1001        
14 B1 806 783        
15 B1 348 338        
16 B2 3238 3144        
17 B2 1778 1726        
18 B2 1423 1381        
19 B2 1260 1223        
20 B2 1095 1063        
21 B2 938 911        

Unscaled Zero Point Vibrational Energy (zpe) 15905.6 cm-1
Scaled (by 0.9707) Zero Point Vibrational Energy (zpe) 15439.5 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)=FULL/6-31G*
ABC
0.36162 0.30033 0.16945

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.210
N2 0.000 0.997 0.283
N3 0.000 -0.997 0.283
C4 0.000 0.728 -0.953
C5 0.000 -0.728 -0.953
H6 -0.899 0.000 1.839
H7 0.899 0.000 1.839
H8 0.000 1.480 -1.737
H9 0.000 -1.480 -1.737

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.36171.36172.28212.28211.09731.09733.29763.2976
N21.36171.99471.26492.12222.05512.05512.07673.1963
N31.36171.99472.12221.26492.05512.05513.19632.0767
C42.28211.26492.12221.45573.02183.02181.08632.3428
C52.28212.12221.26491.45573.02183.02182.34281.0863
H61.09732.05512.05513.02183.02181.79903.97273.9727
H71.09732.05512.05513.02183.02181.79903.97273.9727
H83.29762.07673.19631.08632.34283.97273.97272.9597
H93.29763.19632.07672.34281.08633.97273.97272.9597

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 120.609 C1 N3 C5 120.609
N2 C1 N3 94.182 N2 C1 H6 112.953
N2 C1 H7 112.953 N2 C4 C5 102.300
N2 C4 H8 123.891 N3 C1 H6 112.953
N3 C1 H7 112.953 N3 C5 C4 102.300
N3 C5 H9 123.891 C4 C5 H9 133.809
C5 C4 H8 133.809 H6 C1 H7 110.112
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability