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/cc-pVTZ

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/cc-pVTZ
 hartrees
Energy at 0K-225.171974
Energy at 298.15K 
HF Energy-224.277356
Nuclear repulsion energy154.971104
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/cc-pVTZ
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 3306 3138 0.68      
2 A1 3295 3128 16.83      
3 A1 1479 1405 34.59      
4 A1 1416 1344 74.85      
5 A1 1245 1182 61.84      
6 A1 1079 1024 16.00      
7 A1 944 896 1.57      
8 A2 1054 1000 0.00      
9 A2 614 583 0.00      
10 B1 1010 959 1.88      
11 B1 909 863 14.16      
12 B1 534 507 38.98      
13 B2 3276 3110 0.23      
14 B2 1673 1588 61.55      
15 B2 1323 1256 0.14      
16 B2 1233 1171 36.22      
17 B2 1003 952 50.47      
18 B2 90i 85i 0.68      

Unscaled Zero Point Vibrational Energy (zpe) 12651.3 cm-1
Scaled (by 0.9494) Zero Point Vibrational Energy (zpe) 12011.2 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/cc-pVTZ
ABC
0.36480 0.31455 0.16891

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.079
N2 0.000 1.158 0.369
N3 0.000 -1.158 0.369
C4 0.000 0.715 -0.863
C5 0.000 -0.715 -0.863
H6 0.000 0.000 2.152
H7 0.000 1.370 -1.715
H8 0.000 -1.370 -1.715

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8
C11.35801.35802.06892.06891.07373.11113.1111
N21.35802.31561.30892.24152.12632.09433.2756
N31.35802.31562.24151.30892.12633.27562.0943
C42.06891.30892.24151.43003.09881.07442.2521
C52.06892.24151.30891.43003.09882.25211.0744
H61.07372.12632.12633.09883.09884.10254.1025
H73.11112.09433.27561.07442.25214.10252.7395
H83.11113.27562.09432.25211.07444.10252.7395

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 101.737 C1 N3 C5 101.737
N2 C1 N3 116.979 N2 C1 H6 121.511
N2 C4 C5 109.774 N2 C4 H7 122.681
N3 C1 H6 121.511 N3 C5 C4 109.774
N3 C5 H8 122.681 C4 C5 H8 127.546
C5 C4 H7 127.546
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability