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

using model chemistry: MP2/STO-3G

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/STO-3G
 hartrees
Energy at 0K-221.609100
Energy at 298.15K 
HF Energy-221.378744
Nuclear repulsion energy149.863392
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/STO-3G
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 3550 3095 0.07      
2 A1 3544 3090 20.14      
3 A1 1662 1449 35.86      
4 A1 1347 1174 35.26      
5 A1 1118 975 32.79      
6 A1 968 844 36.87      
7 A1 925 806 8.19      
8 A2 1075 937 0.00      
9 A2 660 576 0.00      
10 B1 997 870 4.13      
11 B1 741 646 0.02      
12 B1 563 491 22.43      
13 B2 3534 3081 0.95      
14 B2 1650 1438 2.33      
15 B2 1338 1167 0.53      
16 B2 1201 1047 1.88      
17 B2 1022 891 22.49      
18 B2 517i 450i 4.39      

Unscaled Zero Point Vibrational Energy (zpe) 12689.0 cm-1
Scaled (by 0.8719) Zero Point Vibrational Energy (zpe) 11063.5 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/STO-3G
ABC
0.34879 0.28671 0.15736

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/STO-3G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.126
N2 0.000 1.216 0.358
N3 0.000 -1.216 0.358
C4 0.000 0.748 -0.873
C5 0.000 -0.748 -0.873
H6 0.000 0.000 2.229
H7 0.000 1.396 -1.764
H8 0.000 -1.396 -1.764

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8
C11.43841.43842.13382.13381.10323.20983.2098
N21.43842.43281.31682.31812.23162.13003.3661
N31.43842.43282.31811.31682.23163.36612.1300
C42.13381.31682.31811.49603.19051.10252.3223
C52.13382.31811.31681.49603.19052.32231.1025
H61.10322.23162.23163.19053.19054.23044.2304
H73.20982.13003.36611.10252.32234.23042.7925
H83.20983.36612.13002.32231.10254.23042.7925

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 101.421 C1 N3 C5 101.421
N2 C1 N3 115.484 N2 C1 H6 122.258
N2 C4 C5 110.837 N2 C4 H7 123.150
N3 C1 H6 122.258 N3 C5 C4 110.837
N3 C5 H8 123.150 C4 C5 H8 126.013
C5 C4 H7 126.013
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability