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All results from a given calculation for C3H4N2 (4H-Imidazole)

using model chemistry: B2PLYP=FULLultrafine/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B2PLYP=FULLultrafine/6-311G*
 hartrees
Energy at 0K-226.039568
Energy at 298.15K 
HF Energy-225.767131
Nuclear repulsion energy160.623538
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/6-311G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3241 3241 15.16      
2 A' 3217 3217 11.31      
3 A' 3071 3071 2.38      
4 A' 1640 1640 38.79      
5 A' 1544 1544 8.51      
6 A' 1437 1437 21.49      
7 A' 1330 1330 24.03      
8 A' 1316 1316 5.74      
9 A' 1278 1278 7.92      
10 A' 1039 1039 60.35      
11 A' 1004 1004 10.32      
12 A' 948 948 3.68      
13 A' 884 884 1.41      
14 A' 882 882 15.71      
15 A" 3108 3108 2.68      
16 A" 1178 1178 0.39      
17 A" 1008 1008 15.20      
18 A" 957 957 0.13      
19 A" 757 757 8.13      
20 A" 567 567 21.35      
21 A" 368 368 7.06      

Unscaled Zero Point Vibrational Energy (zpe) 15385.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 15385.7 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/6-311G*
ABC
0.32089 0.29241 0.15745

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULLultrafine/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -1.201 0.358 0.000
C2 0.000 1.135 0.000
N3 1.119 0.505 0.000
C4 0.733 -0.901 0.000
C5 -0.766 -0.856 0.000
H6 -0.074 2.215 0.000
H7 1.143 -1.408 0.880
H8 1.143 -1.408 -0.880
H9 -1.439 -1.706 0.000

Atom - Atom Distances (Å)
  N1 C2 N3 C4 C5 H6 H7 H8 H9
N11.43012.32412.30761.28892.17233.06363.06362.0779
C21.43011.28372.16392.13251.08292.92332.92333.1845
N32.32411.28371.45842.32452.08482.10602.10603.3809
C42.30762.16391.45841.49973.21921.09501.09502.3160
C51.28892.13252.32451.49973.14762.17332.17331.0846
H62.17231.08292.08483.21923.14763.92203.92204.1521
H73.06362.92332.10601.09502.17333.92201.75972.7436
H83.06362.92332.10601.09502.17333.92201.75972.7436
H92.07793.18453.38092.31601.08464.15212.74362.7436

picture of 4H-Imidazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 N3 117.731 N1 C2 H6 118.982
N1 C5 C4 111.463 N1 C5 H9 121.960
C2 N1 C5 103.187 C2 N3 C4 104.033
N3 C2 H6 123.287 N3 C4 C5 103.585
N3 C4 H7 110.323 N3 C4 H8 110.323
C4 C5 H9 126.577 C5 C4 H7 112.849
C5 C4 H8 112.849 H7 C4 H8 106.939
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability