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

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 2B1
Energy calculated at QCISD/6-31G**
 hartrees
Energy at 0K-224.923175
Energy at 298.15K-224.927618
HF Energy-224.207012
Nuclear repulsion energy152.679314
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 3321 3126 3.16      
2 A1 3310 3116 12.11      
3 A1 1502 1414 14.31      
4 A1 1346 1267 48.76      
5 A1 1166 1098 25.24      
6 A1 1022 962 2.69      
7 A1 923 869 3.53      
8 A2 862 811 0.00      
9 A2 565 532 0.00      
10 B1 850 800 1.20      
11 B1 773 728 19.26      
12 B1 529 498 31.68      
13 B2 3297 3104 2.26      
14 B2 1572 1480 14.20      
15 B2 1332 1254 0.00      
16 B2 1215 1144 6.08      
17 B2 1019 959 56.70      
18 B2 805 758 0.09      

Unscaled Zero Point Vibrational Energy (zpe) 12705.1 cm-1
Scaled (by 0.9414) Zero Point Vibrational Energy (zpe) 11960.6 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
0.35446 0.30413 0.16369

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 1.098
N2 0.000 1.171 0.372
N3 0.000 -1.171 0.372
C4 0.000 0.738 -0.876
C5 0.000 -0.738 -0.876
H6 0.000 0.000 2.177
H7 0.000 1.400 -1.729
H8 0.000 -1.400 -1.729

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8
C11.37831.37832.10802.10801.07873.15503.1550
N21.37832.34261.32142.28072.15202.11313.3205
N31.37832.34262.28071.32142.15203.32052.1131
C42.10801.32142.28071.47513.14131.07982.3015
C52.10802.28071.32141.47513.14132.30151.0798
H61.07872.15202.15203.14133.14134.14934.1493
H73.15502.11313.32051.07982.30154.14932.8005
H83.15503.32052.11312.30151.07984.14932.8005

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 102.650 C1 N3 C5 102.650
N2 C1 N3 116.377 N2 C1 H6 121.811
N2 C4 C5 109.162 N2 C4 H7 122.976
N3 C1 H6 121.811 N3 C5 C4 109.162
N3 C5 H8 122.976 C4 C5 H8 127.862
C5 C4 H7 127.862
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability