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=FULL/cc-pVTZ

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=FULL/cc-pVTZ
 hartrees
Energy at 0K-226.037310
Energy at 298.15K-226.043361
HF Energy-225.729986
Nuclear repulsion energy167.126845
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=FULL/cc-pVTZ
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 3247 3103 14.35      
2 A1 3086 2950 0.02      
3 A1 1689 1614 21.80      
4 A1 1422 1359 5.16      
5 A1 1398 1336 20.37      
6 A1 1257 1202 4.21      
7 A1 1040 994 2.01      
8 A1 937 896 12.93      
9 A2 1158 1106 0.00      
10 A2 939 898 0.00      
11 A2 554 529 0.00      
12 B1 3122 2984 0.61      
13 B1 1019 974 21.41      
14 B1 839 802 5.17      
15 B1 373 357 36.33      
16 B2 3232 3089 5.56      
17 B2 1756 1679 0.08      
18 B2 1390 1329 33.72      
19 B2 1255 1200 1.17      
20 B2 1087 1039 36.45      
21 B2 942 900 70.93      

Unscaled Zero Point Vibrational Energy (zpe) 15869.6 cm-1
Scaled (by 0.9558) Zero Point Vibrational Energy (zpe) 15168.1 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=FULL/cc-pVTZ
ABC
0.36371 0.30577 0.17151

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.198
N2 0.000 0.997 0.281
N3 0.000 -0.997 0.281
C4 0.000 0.725 -0.944
C5 0.000 -0.725 -0.944
H6 -0.890 0.000 1.827
H7 0.890 0.000 1.827
H8 0.000 1.465 -1.726
H9 0.000 -1.465 -1.726

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.35481.35482.26122.26121.08931.08933.27083.2708
N21.35481.99321.25402.11242.04342.04342.06063.1760
N31.35481.99322.11241.25402.04342.04343.17602.0606
C42.26121.25402.11241.44972.99862.99861.07722.3256
C52.26122.11241.25401.44972.99862.99862.32561.0772
H61.08932.04342.04342.99862.99861.77953.94463.9446
H71.08932.04342.04342.99862.99861.77953.94463.9446
H83.27082.06063.17601.07722.32563.94463.94462.9305
H93.27083.17602.06062.32561.07723.94463.94462.9305

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 120.123 C1 N3 C5 120.123
N2 C1 N3 94.721 N2 C1 H6 113.004
N2 C1 H7 113.004 N2 C4 C5 102.516
N2 C4 H8 124.062 N3 C1 H6 113.004
N3 C1 H7 113.004 N3 C5 C4 102.516
N3 C5 H9 124.062 C4 C5 H9 133.421
C5 C4 H8 133.421 H6 C1 H7 109.533
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability