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

using model chemistry: MP2/aug-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/aug-cc-pVTZ
 hartrees
Energy at 0K-225.691205
Energy at 298.15K-225.697204
HF Energy-224.806943
Nuclear repulsion energy166.676899
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/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 A1 3271 3117 8.16      
2 A1 3105 2959 2.29      
3 A1 1647 1569 22.60      
4 A1 1419 1352 5.95      
5 A1 1390 1324 23.89      
6 A1 1257 1197 3.95      
7 A1 1044 995 0.33      
8 A1 926 883 9.85      
9 A2 1151 1097 0.00      
10 A2 915 872 0.00      
11 A2 538 513 0.00      
12 B1 3160 3011 3.33      
13 B1 1003 956 23.04      
14 B1 827 788 4.64      
15 B1 352 335 35.76      
16 B2 3258 3104 1.27      
17 B2 1720 1639 0.01      
18 B2 1383 1318 35.27      
19 B2 1242 1184 1.58      
20 B2 1085 1034 36.83      
21 B2 932 889 59.12      

Unscaled Zero Point Vibrational Energy (zpe) 15812.1 cm-1
Scaled (by 0.9529) Zero Point Vibrational Energy (zpe) 15067.3 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/aug-cc-pVTZ
ABC
0.36332 0.30314 0.17066

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.203
N2 0.000 0.997 0.284
N3 0.000 -0.997 0.284
C4 0.000 0.724 -0.950
C5 0.000 -0.724 -0.950
H6 -0.895 0.000 1.825
H7 0.895 0.000 1.825
H8 0.000 1.472 -1.726
H9 0.000 -1.472 -1.726

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.35591.35592.27142.27141.09011.09013.27893.2789
N21.35591.99351.26332.11752.04202.04202.06603.1842
N31.35591.99352.11751.26332.04202.04203.18422.0660
C42.27141.26332.11751.44863.00423.00421.07862.3301
C52.27142.11751.26331.44863.00423.00422.33011.0786
H61.09012.04202.04203.00423.00421.79053.94753.9475
H71.09012.04202.04203.00423.00421.79053.94753.9475
H83.27892.06603.18421.07862.33013.94753.94752.9449
H93.27893.18422.06602.33011.07863.94753.94752.9449

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 120.229 C1 N3 C5 120.229
N2 C1 N3 94.634 N2 C1 H6 112.753
N2 C1 H7 112.753 N2 C4 C5 102.454
N2 C4 H8 123.625 N3 C1 H6 112.753
N3 C1 H7 112.753 N3 C5 C4 102.454
N3 C5 H9 123.625 C4 C5 H9 133.921
C5 C4 H8 133.921 H6 C1 H7 110.432
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability