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All results from a given calculation for C3H4N2 (2H-Imidazole)

using model chemistry: MP2/6-311+G(3df,2p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP2/6-311+G(3df,2p)
 hartrees
Energy at 0K-225.672767
Energy at 298.15K-225.678765
HF Energy-224.802758
Nuclear repulsion energy166.765588
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 MP2/6-311+G(3df,2p)
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 3271 3086 8.12      
2 A1 3107 2931 2.21      
3 A1 1652 1559 22.13      
4 A1 1421 1341 5.37      
5 A1 1392 1313 24.70      
6 A1 1258 1186 4.03      
7 A1 1046 987 0.40      
8 A1 929 876 9.69      
9 A2 1154 1089 0.00      
10 A2 911 859 0.00      
11 A2 539 509 0.00      
12 B1 3161 2982 3.39      
13 B1 1005 948 22.19      
14 B1 822 776 5.16      
15 B1 353 333 36.45      
16 B2 3258 3074 1.23      
17 B2 1726 1628 0.03      
18 B2 1388 1310 34.90      
19 B2 1249 1179 1.49      
20 B2 1089 1027 38.33      
21 B2 933 880 58.90      

Unscaled Zero Point Vibrational Energy (zpe) 15832.7 cm-1
Scaled (by 0.9434) Zero Point Vibrational Energy (zpe) 14936.5 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 MP2/6-311+G(3df,2p)
ABC
0.36353 0.30361 0.17085

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-311+G(3df,2p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.202
N2 0.000 0.997 0.284
N3 0.000 -0.997 0.284
C4 0.000 0.724 -0.948
C5 0.000 -0.724 -0.948
H6 -0.895 0.000 1.825
H7 0.895 0.000 1.825
H8 0.000 1.471 -1.727
H9 0.000 -1.471 -1.727

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.35531.35532.26912.26911.09031.09033.27783.2778
N21.35531.99331.26202.11632.04212.04212.06603.1831
N31.35531.99332.11631.26202.04212.04213.18312.0660
C42.26911.26202.11631.44793.00303.00301.07902.3289
C52.26912.11631.26201.44793.00303.00302.32891.0790
H61.09032.04212.04213.00303.00301.78933.94763.9476
H71.09032.04212.04213.00303.00301.78933.94763.9476
H83.27782.06603.18311.07902.32893.94763.94762.9418
H93.27783.18312.06602.32891.07903.94763.94762.9418

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 120.179 C1 N3 C5 120.179
N2 C1 N3 94.683 N2 C1 H6 112.789
N2 C1 H7 112.789 N2 C4 C5 102.480
N2 C4 H8 123.713 N3 C1 H6 112.789
N3 C1 H7 112.789 N3 C5 C4 102.480
N3 C5 H9 123.713 C4 C5 H9 133.807
C5 C4 H8 133.807 H6 C1 H7 110.277
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability