return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: MP2=FULL/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=FULL/STO-3G
 hartrees
Energy at 0K-221.610700
Energy at 298.15K 
HF Energy-221.378706
Nuclear repulsion energy149.887475
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=FULL/STO-3G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3550 3156 0.06      
2 A1 3545 3151 20.09      
3 A1 1663 1478 36.32      
4 A1 1347 1198 35.39      
5 A1 1119 995 32.75      
6 A1 969 861 37.17      
7 A1 925 822 8.25      
8 A2 1076 956 0.00      
9 A2 661 587 0.00      
10 B1 998 887 4.11      
11 B1 741 659 0.02      
12 B1 563 501 22.45      
13 B2 3535 3142 0.95      
14 B2 1651 1467 2.34      
15 B2 1338 1190 0.53      
16 B2 1202 1068 1.89      
17 B2 1022 909 22.51      
18 B2 523i 465i 4.40      

Unscaled Zero Point Vibrational Energy (zpe) 12690.5 cm-1
Scaled (by 0.8889) Zero Point Vibrational Energy (zpe) 11280.6 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=FULL/STO-3G
ABC
0.34889 0.28682 0.15741

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/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 -0.872
C5 0.000 -0.748 -0.872
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
C11.43821.43822.13352.13351.10323.20943.2094
N21.43822.43241.31662.31762.23142.12973.3656
N31.43822.43242.31761.31662.23143.36562.1297
C42.13351.31662.31761.49563.19021.10242.3218
C52.13352.31761.31661.49563.19022.32181.1024
H61.10322.23142.23143.19023.19024.23004.2300
H73.20942.12973.36561.10242.32184.23002.7919
H83.20943.36562.12972.32181.10244.23002.7919

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 101.419 C1 N3 C5 101.419
N2 C1 N3 115.477 N2 C1 H6 122.261
N2 C4 C5 110.842 N2 C4 H7 123.145
N3 C1 H6 122.261 N3 C5 C4 110.842
N3 C5 H8 123.145 C4 C5 H8 126.013
C5 C4 H7 126.013
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability