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

using model chemistry: CCD/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at CCD/3-21G
 hartrees
Energy at 0K-224.045981
Energy at 298.15K-224.052016
HF Energy-223.544726
Nuclear repulsion energy160.697596
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 CCD/3-21G
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' 3618 3518 66.49      
2 A' 3292 3201 1.78      
3 A' 3270 3179 2.85      
4 A' 3266 3176 1.86      
5 A' 1545 1502 20.73      
6 A' 1479 1438 6.87      
7 A' 1427 1387 22.01      
8 A' 1338 1301 9.68      
9 A' 1282 1247 5.39      
10 A' 1169 1136 1.24      
11 A' 1097 1067 3.73      
12 A' 1082 1052 41.08      
13 A' 1040 1011 9.77      
14 A' 965 939 2.21      
15 A' 923 897 8.89      
16 A" 871 847 1.23      
17 A" 842 819 25.46      
18 A" 755 734 38.27      
19 A" 680 661 8.73      
20 A" 651 633 27.94      
21 A" 613 596 146.82      

Unscaled Zero Point Vibrational Energy (zpe) 15601.7 cm-1
Scaled (by 0.9723) Zero Point Vibrational Energy (zpe) 15169.5 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 CCD/3-21G
ABC
0.31311 0.30549 0.15463

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 1.123 0.000
C2 -1.113 0.288 0.000
C3 1.135 0.298 0.000
N4 -0.760 -0.998 0.000
C5 0.660 -0.996 0.000
H6 -0.002 2.134 0.000
H7 -2.125 0.666 0.000
H8 2.139 0.696 0.000
H9 1.220 -1.918 0.000

Atom - Atom Distances (Å)
  N1 C2 C3 N4 C5 H6 H7 H8 H9
N11.39121.40262.25222.21861.01152.17402.18153.2764
C21.39122.24831.33362.18902.15451.08023.27803.2115
C31.40262.24832.29571.37872.15913.28101.08012.2182
N42.25221.33362.29571.41953.22212.15203.35752.1836
C52.21862.18901.37871.41953.19893.24292.24731.0794
H61.01152.15452.15913.22213.19892.58182.57944.2324
H72.17401.08023.28102.15203.24292.58184.26484.2272
H82.18153.27801.08013.35752.24732.57944.26482.7707
H93.27643.21152.21822.18361.07944.23244.22722.7707

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 111.478 N1 C2 H7 122.710
N1 C3 C5 105.816 N1 C3 H8 122.435
C2 N1 C3 107.170 C2 N1 H6 126.742
C2 N4 C5 105.292 C3 N1 H6 126.088
C3 C5 N4 110.244 C3 C5 H9 128.540
N4 C2 H7 125.812 N4 C5 H9 121.216
C5 C3 H8 131.749
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability