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

using model chemistry: MP2/CEP-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 MP2/CEP-31G*
 hartrees
Energy at 0K-38.144498
Energy at 298.15K-38.148442
HF Energy-37.524761
Nuclear repulsion energy77.346049
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 MP2/CEP-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 3295 3128 0.25      
2 A1 3280 3114 33.38      
3 A1 1505 1429 79.03      
4 A1 1391 1321 90.14      
5 A1 1213 1152 58.84      
6 A1 1067 1013 11.85      
7 A1 926 879 2.43      
8 A2 1001 950 0.00      
9 A2 607 576 0.00      
10 B1 987 937 1.95      
11 B1 896 851 22.40      
12 B1 545 517 49.39      
13 B2 3261 3096 0.00      
14 B2 1663 1579 85.16      
15 B2 1305 1239 1.69      
16 B2 1211 1149 48.44      
17 B2 980 930 40.67      
18 B2 111 105 0.07      

Unscaled Zero Point Vibrational Energy (zpe) 12621.2 cm-1
Scaled (by 0.9494) Zero Point Vibrational Energy (zpe) 11982.6 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 MP2/CEP-31G*
ABC
0.35530 0.30250 0.16339

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.091
N2 0.000 1.179 0.375
N3 0.000 -1.179 0.375
C4 0.000 0.731 -0.875
C5 0.000 -0.731 -0.875
H6 0.000 0.000 2.184
H7 0.000 1.402 -1.738
H8 0.000 -1.402 -1.738

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8
C11.37951.37952.09732.09731.09283.15763.1576
N21.37952.35791.32702.28262.15932.12483.3356
N31.37952.35792.28261.32702.15933.33562.1248
C42.09731.32702.28261.46293.14471.09352.3016
C52.09732.28261.32701.46293.14472.30161.0935
H61.09282.15932.15933.14473.14474.16524.1652
H73.15762.12483.33561.09352.30164.16522.8040
H83.15763.33562.12482.30161.09354.16522.8040

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 101.574 C1 N3 C5 101.574
N2 C1 N3 117.438 N2 C1 H6 121.281
N2 C4 C5 109.707 N2 C4 H7 122.468
N3 C1 H6 121.281 N3 C5 C4 109.707
N3 C5 H8 122.468 C4 C5 H8 127.825
C5 C4 H7 127.825
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability