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All results from a given calculation for C3H4N2 (1H-Imidazole)

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

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/6-31G(2df,p)
 hartrees
Energy at 0K-225.677329
Energy at 298.15K-225.683321
HF Energy-224.836775
Nuclear repulsion energy163.267107
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 MP2/6-31G(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 A' 3712 3506 79.54      
2 A' 3338 3153 0.34      
3 A' 3312 3129 0.50      
4 A' 3310 3126 2.25      
5 A' 1543 1457 9.15      
6 A' 1516 1432 18.09      
7 A' 1474 1392 15.65      
8 A' 1377 1301 8.83      
9 A' 1284 1213 0.79      
10 A' 1195 1128 3.51      
11 A' 1163 1098 2.40      
12 A' 1114 1053 24.30      
13 A' 1093 1032 22.49      
14 A' 937 885 1.46      
15 A' 898 848 8.39      
16 A" 853 806 9.92      
17 A" 800 756 35.03      
18 A" 725 685 15.63      
19 A" 691 652 0.00      
20 A" 653 617 24.59      
21 A" 557 526 78.27      

Unscaled Zero Point Vibrational Energy (zpe) 15772.5 cm-1
Scaled (by 0.9445) Zero Point Vibrational Energy (zpe) 14897.1 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 MP2/6-31G(2df,p)
ABC
0.32720 0.31225 0.15978

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 1.102 0.000
C2 -1.088 0.284 0.000
C3 1.117 0.306 0.000
N4 -0.740 -0.992 0.000
C5 0.633 -0.983 0.000
H6 -0.011 2.108 0.000
H7 -2.096 0.666 0.000
H8 2.111 0.717 0.000
H9 1.200 -1.900 0.000

Atom - Atom Distances (Å)
  N1 C2 C3 N4 C5 H6 H7 H8 H9
N11.36131.37122.22072.17901.00612.14082.14593.2327
C21.36132.20481.32232.13722.11831.07813.22843.1627
C31.37122.20482.26531.37682.12583.23281.07602.2075
N42.22071.32232.26531.37313.18442.14213.32402.1418
C52.17902.13721.37681.37313.15753.18882.25271.0778
H61.00612.11832.12583.18443.15752.53482.53754.1868
H72.14081.07813.23282.14213.18882.53484.20744.1770
H82.14593.22841.07603.32402.25272.53754.20742.7710
H93.23273.16272.20752.14181.07784.18684.17702.7710

picture of 1H-Imidazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 N4 111.675 N1 C2 H7 122.282
N1 C3 C5 104.918 N1 C3 H8 122.067
C2 N1 C3 107.584 C2 N1 H6 126.302
C2 N4 C5 104.896 C3 N1 H6 126.115
C3 C5 N4 110.928 C3 C5 H9 127.719
N4 C2 H7 126.043 N4 C5 H9 121.353
C5 C3 H8 133.015
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability