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

using model chemistry: MP3/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP3/6-31G*
 hartrees
Energy at 0K-225.436034
Energy at 298.15K-225.442052
HF Energy-224.724115
Nuclear repulsion energy166.588798
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 MP3/6-31G*
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 3102 9.24      
2 A1 3134 2942 0.01      
3 A1 1774 1666 20.86      
4 A1 1489 1397 5.96      
5 A1 1447 1359 13.57      
6 A1 1296 1216 4.04      
7 A1 1074 1008 0.97      
8 A1 968 908 14.00      
9 A2 1177 1105 0.00      
10 A2 883 829 0.00      
11 A2 543 509 0.00      
12 B1 3182 2987 0.06      
13 B1 1046 982 21.29      
14 B1 828 777 7.65      
15 B1 359 337 39.71      
16 B2 3290 3088 7.08      
17 B2 1841 1728 0.28      
18 B2 1458 1369 30.03      
19 B2 1282 1203 1.10      
20 B2 1113 1044 32.92      
21 B2 955 896 68.28      

Unscaled Zero Point Vibrational Energy (zpe) 16221.9 cm-1
Scaled (by 0.9386) Zero Point Vibrational Energy (zpe) 15225.9 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 MP3/6-31G*
ABC
0.36259 0.30296 0.17046

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.206
N2 0.000 0.997 0.281
N3 0.000 -0.997 0.281
C4 0.000 0.726 -0.947
C5 0.000 -0.726 -0.947
H6 -0.896 0.000 1.833
H7 0.896 0.000 1.833
H8 0.000 1.472 -1.732
H9 0.000 -1.472 -1.732

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.36041.36042.27262.27261.09411.09413.28633.2863
N21.36041.99441.25772.11612.05142.05142.06803.1859
N31.36041.99442.11611.25772.05142.05143.18592.0680
C42.27261.25772.11611.45223.01053.01051.08292.3343
C52.27262.11611.25771.45223.01053.01052.33431.0829
H61.09412.05142.05143.01053.01051.79283.96013.9601
H71.09412.05142.05143.01053.01051.79283.96013.9601
H83.28632.06803.18591.08292.33433.96013.96012.9450
H93.28633.18592.06802.33431.08293.96013.96012.9450

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 120.409 C1 N3 C5 120.409
N2 C1 N3 94.285 N2 C1 H6 112.952
N2 C1 H7 112.952 N2 C4 C5 102.449
N2 C4 H8 123.977 N3 C1 H6 112.952
N3 C1 H7 112.952 N3 C5 C4 102.449
N3 C5 H9 123.977 C4 C5 H9 133.574
C5 C4 H8 133.574 H6 C1 H7 110.035
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability