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 C3H4N2 (2H-Imidazole)

using model chemistry: B2PLYP=FULLultrafine/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B2PLYP=FULLultrafine/6-31G**
 hartrees
Energy at 0K-225.898896
Energy at 298.15K 
HF Energy-225.654257
Nuclear repulsion energy166.643588
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 B2PLYP=FULLultrafine/6-31G**
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 3277 3277 13.53      
2 A1 3106 3106 0.08      
3 A1 1719 1719 21.06      
4 A1 1448 1448 6.28      
5 A1 1414 1414 12.09      
6 A1 1274 1274 4.88      
7 A1 1050 1050 2.24      
8 A1 941 941 12.71      
9 A2 1160 1160 0.00      
10 A2 913 913 0.00      
11 A2 547 547 0.00      
12 B1 3152 3152 0.02      
13 B1 1026 1026 17.74      
14 B1 830 830 3.76      
15 B1 365 365 39.46      
16 B2 3262 3262 9.97      
17 B2 1784 1784 0.00      
18 B2 1410 1410 33.79      
19 B2 1264 1264 0.88      
20 B2 1096 1096 31.96      
21 B2 937 937 72.37      

Unscaled Zero Point Vibrational Energy (zpe) 15986.3 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 15986.3 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 B2PLYP=FULLultrafine/6-31G**
ABC
0.36280 0.30320 0.17053

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULLultrafine/6-31G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.203
N2 0.000 0.997 0.282
N3 0.000 -0.997 0.282
C4 0.000 0.726 -0.948
C5 0.000 -0.726 -0.948
H6 -0.893 0.000 1.834
H7 0.893 0.000 1.834
H8 0.000 1.471 -1.731
H9 0.000 -1.471 -1.731

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.35741.35742.27072.27071.09261.09263.28293.2829
N21.35741.99381.25952.11732.04882.04882.06863.1852
N31.35741.99382.11731.25952.04882.04883.18522.0686
C42.27071.25952.11731.45283.01023.01021.08102.3331
C52.27072.11731.25951.45283.01023.01022.33311.0810
H61.09262.04882.04883.01023.01021.78513.95853.9585
H71.09262.04882.04883.01023.01021.78513.95853.9585
H83.28292.06863.18521.08102.33313.95853.95852.9425
H93.28293.18522.06862.33311.08103.95853.95852.9425

picture of 2H-Imidazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C4 120.341 C1 N3 C5 120.341
N2 C1 N3 94.514 N2 C1 H6 113.046
N2 C1 H7 113.046 N2 C4 C5 102.402
N2 C4 H8 124.041 N3 C1 H6 113.046
N3 C1 H7 113.046 N3 C5 C4 102.402
N3 C5 H9 124.041 C4 C5 H9 133.557
C5 C4 H8 133.557 H6 C1 H7 109.552
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability