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

using model chemistry: MP2=FULL/cc-pVQZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2=FULL/cc-pVQZ
 hartrees
Energy at 0K-225.958261
Energy at 298.15K-225.964190
HF Energy-224.888932
Nuclear repulsion energy161.503032
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-pVQZ
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' 3269 3129 6.70      
2 A' 3248 3108 4.04      
3 A' 3099 2966 1.25      
4 A' 1618 1549 27.83      
5 A' 1534 1468 5.16      
6 A' 1407 1346 24.03      
7 A' 1331 1274 24.37      
8 A' 1313 1256 4.82      
9 A' 1263 1209 5.84      
10 A' 1059 1013 50.01      
11 A' 1019 975 11.60      
12 A' 967 926 2.81      
13 A' 882 844 12.00      
14 A' 880 843 5.45      
15 A" 3149 3014 0.03      
16 A" 1170 1120 0.53      
17 A" 1002 959 15.64      
18 A" 963 921 1.51      
19 A" 754 722 5.82      
20 A" 567 542 18.91      
21 A" 360 344 6.20      

Unscaled Zero Point Vibrational Energy (zpe) 15425.0 cm-1
Scaled (by 0.9571) Zero Point Vibrational Energy (zpe) 14763.3 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 MP2=FULL/cc-pVQZ
ABC
0.32363 0.29666 0.15931

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -1.192 0.361 0.000
C2 0.000 1.132 0.000
N3 1.115 0.496 0.000
C4 0.723 -0.897 0.000
C5 -0.760 -0.852 0.000
H6 -0.067 2.206 0.000
H7 1.129 -1.401 0.876
H8 1.129 -1.401 -0.876
H9 -1.429 -1.698 0.000

Atom - Atom Distances (Å)
  N1 C2 N3 C4 C5 H6 H7 H8 H9
N11.41942.31052.29141.28762.16123.04233.04232.0720
C21.41941.28282.15372.12431.07672.90762.90763.1696
N32.31051.28281.44732.30922.07822.08982.08983.3590
C42.29142.15371.44731.48403.20221.08891.08892.2964
C51.28762.12432.30921.48403.13582.15302.15301.0781
H62.16121.07672.07823.20223.13583.89963.89964.1345
H73.04232.90762.08981.08892.15303.89961.75242.7197
H83.04232.90762.08981.08892.15303.89961.75242.7197
H92.07203.16963.35902.29641.07814.13452.71972.7197

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 117.436 N1 C2 H6 119.319
N1 C5 C4 111.334 N1 C5 H9 122.045
C2 N1 C5 103.285 C2 N3 C4 103.997
N3 C2 H6 123.245 N3 C4 C5 103.948
N3 C4 H7 110.169 N3 C4 H8 110.169
C4 C5 H9 126.621 C5 C4 H7 112.703
C5 C4 H8 112.703 H7 C4 H8 107.160
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability