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

using model chemistry: MP2/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 MP2/cc-pVTZ
 hartrees
Energy at 0K-225.672316
Energy at 298.15K-225.678330
HF Energy-224.803571
Nuclear repulsion energy166.800009
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/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 3275 3110 9.52      
2 A1 3114 2956 1.11      
3 A1 1660 1576 20.53      
4 A1 1419 1348 3.85      
5 A1 1392 1321 22.26      
6 A1 1262 1198 4.27      
7 A1 1047 994 0.81      
8 A1 929 882 12.70      
9 A2 1152 1094 0.00      
10 A2 923 877 0.00      
11 A2 545 517 0.00      
12 B1 3167 3007 1.97      
13 B1 1008 957 22.96      
14 B1 828 787 4.70      
15 B1 356 338 35.82      
16 B2 3262 3097 2.89      
17 B2 1731 1643 0.03      
18 B2 1389 1319 34.00      
19 B2 1247 1184 0.73      
20 B2 1088 1033 34.31      
21 B2 935 887 66.94      

Unscaled Zero Point Vibrational Energy (zpe) 15864.2 cm-1
Scaled (by 0.9495) Zero Point Vibrational Energy (zpe) 15063.0 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/cc-pVTZ
ABC
0.36346 0.30384 0.17089

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

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 -0.893 0.000 1.825
H7 0.893 0.000 1.825
H8 0.000 1.471 -1.726
H9 0.000 -1.471 -1.726

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.35511.35512.26872.26871.08911.08913.27643.2764
N21.35511.99331.26142.11642.04122.04122.06473.1822
N31.35511.99332.11641.26142.04122.04123.18222.0647
C42.26871.26142.11641.44883.00203.00201.07802.3289
C52.26872.11641.26141.44883.00203.00202.32891.0780
H61.08912.04122.04123.00203.00201.78653.94583.9458
H71.08912.04122.04123.00203.00201.78653.94583.9458
H83.27642.06473.18221.07802.32893.94583.94582.9415
H93.27643.18222.06472.32891.07803.94583.94582.9415

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 120.190 C1 N3 C5 120.190
N2 C1 N3 94.691 N2 C1 H6 112.807
N2 C1 H7 112.807 N2 C4 C5 102.464
N2 C4 H8 123.722 N3 C1 H6 112.807
N3 C1 H7 112.807 N3 C5 C4 102.464
N3 C5 H9 123.722 C4 C5 H9 133.814
C5 C4 H8 133.814 H6 C1 H7 110.209
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability