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

using model chemistry: MP2=FULL/aug-cc-pVTZ

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/aug-cc-pVTZ
 hartrees
Energy at 0K-225.849445
Energy at 298.15K-225.855379
HF Energy-224.876539
Nuclear repulsion energy161.394722
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/aug-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 A' 3268 3109 6.34      
2 A' 3238 3081 3.83      
3 A' 3091 2941 1.50      
4 A' 1614 1535 29.06      
5 A' 1529 1455 5.60      
6 A' 1415 1346 24.10      
7 A' 1328 1263 25.48      
8 A' 1315 1251 4.02      
9 A' 1261 1200 4.54      
10 A' 1057 1006 50.39      
11 A' 1020 970 12.08      
12 A' 965 918 2.87      
13 A' 879 836 8.43      
14 A' 877 834 7.32      
15 A" 3132 2980 0.03      
16 A" 1181 1124 0.56      
17 A" 1010 961 16.78      
18 A" 976 929 1.09      
19 A" 758 721 4.92      
20 A" 568 540 19.40      
21 A" 353 336 5.88      

Unscaled Zero Point Vibrational Energy (zpe) 15416.8 cm-1
Scaled (by 0.9514) Zero Point Vibrational Energy (zpe) 14667.5 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/aug-cc-pVTZ
ABC
0.32310 0.29636 0.15912

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -1.192 0.361 0.000
C2 0.000 1.133 0.000
N3 1.115 0.496 0.000
C4 0.723 -0.897 0.000
C5 -0.761 -0.854 0.000
H6 -0.068 2.207 0.000
H7 1.128 -1.400 0.879
H8 1.128 -1.400 -0.879
H9 -1.429 -1.699 0.000

Atom - Atom Distances (Å)
  N1 C2 N3 C4 C5 H6 H7 H8 H9
N11.42042.31132.29131.28872.16153.04203.04202.0736
C21.42041.28442.15562.12761.07582.90872.90873.1726
N32.31131.28441.44802.31152.07992.09002.09003.3609
C42.29132.15561.44801.48453.20351.09051.09052.2968
C51.28872.12762.31151.48453.13812.15372.15371.0778
H62.16151.07582.07993.20353.13813.90003.90004.1366
H73.04202.90872.09001.09052.15373.90001.75862.7208
H83.04202.90872.09001.09052.15373.90001.75862.7208
H92.07363.17263.36092.29681.07784.13662.72082.7208

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 117.326 N1 C2 H6 119.335
N1 C5 C4 111.234 N1 C5 H9 122.119
C2 N1 C5 103.402 C2 N3 C4 104.004
N3 C2 H6 123.339 N3 C4 C5 104.034
N3 C4 H7 110.035 N3 C4 H8 110.035
C4 C5 H9 126.647 C5 C4 H7 112.626
C5 C4 H8 112.626 H7 C4 H8 107.473
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability