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

using model chemistry: QCISD(T)/aug-cc-pVDZ

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(T)/aug-cc-pVDZ
 hartrees
Energy at 0K-225.000866
Energy at 298.15K-225.005232
HF Energy-224.229972
Nuclear repulsion energy151.200574
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(T)/aug-cc-pVDZ
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 3244 3172        
2 A1 3233 3161        
3 A1 1433 1401        
4 A1 1292 1263        
5 A1 1134 1109        
6 A1 982 961        
7 A1 893 873        
8 A2 833 815        
9 A2 532 520        
10 B1 842 823        
11 B1 751 735        
12 B1 510 499        
13 B2 3219 3147        
14 B2 1503 1470        
15 B2 1274 1246        
16 B2 1171 1145        
17 B2 991 969        
18 B2 778 761        

Unscaled Zero Point Vibrational Energy (zpe) 12307.0 cm-1
Scaled (by 0.9778) Zero Point Vibrational Energy (zpe) 12033.8 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(T)/aug-cc-pVDZ
ABC
0.34724 0.29875 0.16059

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/aug-cc-pVDZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.109
N2 0.000 1.181 0.376
N3 0.000 -1.181 0.376
C4 0.000 0.744 -0.886
C5 0.000 -0.744 -0.886
H6 0.000 0.000 2.201
H7 0.000 1.419 -1.747
H8 0.000 -1.419 -1.747

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8
C11.39001.39002.12852.12851.09243.18823.1882
N21.39002.36291.33572.30202.17382.13613.3568
N31.39002.36292.30201.33572.17383.35682.1361
C42.12851.33572.30201.48773.17501.09392.3277
C52.12852.30201.33571.48773.17502.32771.0939
H61.09242.17382.17383.17503.17504.19484.1948
H73.18822.13613.35681.09392.32774.19482.8376
H83.18823.35682.13612.32771.09394.19482.8376

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 102.666 C1 N3 C5 102.666
N2 C1 N3 116.419 N2 C1 H6 121.791
N2 C4 C5 109.125 N2 C4 H7 122.778
N3 C1 H6 121.791 N3 C5 C4 109.125
N3 C5 H8 122.778 C4 C5 H8 128.097
C5 C4 H7 128.097
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability