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All results from a given calculation for C3H3N2 (imidazolyl radical)

using model chemistry: CISD/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 2B1
Energy calculated at CISD/6-31G
 hartrees
Energy at 0K-224.483996
Energy at 298.15K-224.488410
HF Energy-224.076788
Nuclear repulsion energy151.662599
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 CISD/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 3384 3173 0.56      
2 A1 3353 3145 5.16      
3 A1 1494 1401 41.57      
4 A1 1357 1272 62.65      
5 A1 1150 1079 45.12      
6 A1 1002 940 12.57      
7 A1 943 884 0.14      
8 A2 915 858 0.00      
9 A2 601 564 0.00      
10 B1 863 809 15.47      
11 B1 823 772 13.51      
12 B1 567 532 48.84      
13 B2 3338 3130 0.74      
14 B2 1559 1462 7.71      
15 B2 1330 1247 0.11      
16 B2 1201 1126 19.67      
17 B2 1005 942 48.40      
18 B2 574 539 2.35      

Unscaled Zero Point Vibrational Energy (zpe) 12728.9 cm-1
Scaled (by 0.9378) Zero Point Vibrational Energy (zpe) 11937.2 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 CISD/6-31G
ABC
0.34521 0.30337 0.16147

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.128
N2 0.000 1.170 0.367
N3 0.000 -1.170 0.367
C4 0.000 0.743 -0.886
C5 0.000 -0.743 -0.886
H6 0.000 0.000 2.204
H7 0.000 1.406 -1.736
H8 0.000 -1.406 -1.736

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8
C11.39611.39612.14712.14711.07563.19113.1911
N21.39612.33991.32342.28652.17832.11603.3254
N31.39612.33992.28651.32342.17833.32542.1160
C42.14711.32342.28651.48593.17811.07832.3112
C52.14712.28651.32341.48593.17812.31121.0783
H61.07562.17832.17833.17813.17814.18364.1836
H73.19112.11603.32541.07832.31124.18362.8125
H83.19113.32542.11602.31121.07834.18362.8125

picture of imidazolyl radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C4 104.245 C1 N3 C5 104.245
N2 C1 N3 113.862 N2 C1 H6 123.069
N2 C4 C5 108.824 N2 C4 H7 123.213
N3 C1 H6 123.069 N3 C5 C4 108.824
N3 C5 H8 123.213 C4 C5 H8 127.963
C5 C4 H7 127.963
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability