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

using model chemistry: QCISD/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 QCISD/6-31G
 hartrees
Energy at 0K-225.106880
Energy at 298.15K-225.112860
HF Energy-224.598242
Nuclear repulsion energy164.282827
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 QCISD/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 3251 3133 8.69      
2 A1 3076 2964 0.12      
3 A1 1681 1620 31.28      
4 A1 1500 1445 11.24      
5 A1 1385 1335 2.06      
6 A1 1252 1206 5.66      
7 A1 1031 993 9.58      
8 A1 932 898 8.41      
9 A2 1167 1124 0.00      
10 A2 814 785 0.00      
11 A2 541 521 0.00      
12 B1 3124 3010 0.43      
13 B1 1066 1027 17.79      
14 B1 790 761 14.53      
15 B1 370 356 48.01      
16 B2 3235 3117 8.57      
17 B2 1727 1664 0.29      
18 B2 1383 1333 12.51      
19 B2 1272 1226 6.25      
20 B2 1078 1039 34.60      
21 B2 964 929 67.93      

Unscaled Zero Point Vibrational Energy (zpe) 15819.0 cm-1
Scaled (by 0.9636) Zero Point Vibrational Energy (zpe) 15243.2 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 QCISD/6-31G
ABC
0.35638 0.29137 0.16546

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.234
N2 0.000 0.999 0.285
N3 0.000 -0.999 0.285
C4 0.000 0.742 -0.968
C5 0.000 -0.742 -0.968
H6 -0.901 0.000 1.862
H7 0.901 0.000 1.862
H8 0.000 1.495 -1.751
H9 0.000 -1.495 -1.751

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.37821.37822.32432.32431.09811.09813.33863.3386
N21.37821.99751.27882.14502.07312.07312.09513.2189
N31.37821.99752.14501.27882.07312.07313.21892.0951
C42.32431.27882.14501.48473.06173.06171.08572.3702
C52.32432.14501.27881.48473.06173.06172.37021.0857
H61.09812.07312.07313.06173.06171.80184.01264.0126
H71.09812.07312.07313.06173.06171.80184.01264.0126
H83.33862.09513.21891.08572.37024.01264.01262.9897
H93.33863.21892.09512.37021.08574.01264.01262.9897

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 121.994 C1 N3 C5 121.994
N2 C1 N3 92.883 N2 C1 H6 113.203
N2 C1 H7 113.203 N2 C4 C5 101.564
N2 C4 H8 124.563 N3 C1 H6 113.203
N3 C1 H7 113.203 N3 C5 C4 101.564
N3 C5 H9 124.563 C4 C5 H9 133.873
C5 C4 H8 133.873 H6 C1 H7 110.255
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability