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

using model chemistry: MP2=FULL/6-31G(2df,p)

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=FULL/6-31G(2df,p)
 hartrees
Energy at 0K-225.617202
Energy at 298.15K-225.623238
HF Energy-224.747695
Nuclear repulsion energy167.021383
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/6-31G(2df,p)
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 3305 3107 7.76      
2 A1 3139 2951 1.23      
3 A1 1687 1585 19.76      
4 A1 1429 1343 8.07      
5 A1 1399 1315 14.79      
6 A1 1270 1194 4.98      
7 A1 1059 996 1.06      
8 A1 939 882 12.27      
9 A2 1175 1104 0.00      
10 A2 939 882 0.00      
11 A2 557 523 0.00      
12 B1 3196 3004 1.82      
13 B1 1019 958 18.54      
14 B1 838 788 2.97      
15 B1 362 340 37.45      
16 B2 3291 3093 3.29      
17 B2 1755 1650 0.44      
18 B2 1394 1310 28.08      
19 B2 1253 1177 0.82      
20 B2 1097 1031 29.88      
21 B2 943 887 70.79      

Unscaled Zero Point Vibrational Energy (zpe) 16022.4 cm-1
Scaled (by 0.9399) Zero Point Vibrational Energy (zpe) 15059.4 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/6-31G(2df,p)
ABC
0.36385 0.30508 0.17137

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G(2df,p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.199
N2 0.000 0.996 0.283
N3 0.000 -0.996 0.283
C4 0.000 0.724 -0.945
C5 0.000 -0.724 -0.945
H6 -0.894 0.000 1.823
H7 0.894 0.000 1.823
H8 0.000 1.467 -1.727
H9 0.000 -1.467 -1.727

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.35331.35332.26302.26301.09001.09003.27313.2731
N21.35331.99291.25822.11392.04032.04032.06463.1795
N31.35331.99292.11391.25822.04032.04033.17952.0646
C42.26301.25822.11391.44792.99772.99771.07862.3261
C52.26302.11391.25821.44792.99772.99772.32611.0786
H61.09002.04032.04032.99772.99771.78703.94393.9439
H71.09002.04032.04032.99772.99771.78703.94393.9439
H83.27312.06463.17951.07862.32613.94393.94392.9335
H93.27313.17952.06462.32611.07863.94393.94392.9335

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 120.075 C1 N3 C5 120.075
N2 C1 N3 94.834 N2 C1 H6 112.801
N2 C1 H7 112.801 N2 C4 C5 102.508
N2 C4 H8 123.963 N3 C1 H6 112.801
N3 C1 H7 112.801 N3 C5 C4 102.508
N3 C5 H9 123.963 C4 C5 H9 133.529
C5 C4 H8 133.529 H6 C1 H7 110.120
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability