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All results from a given calculation for C3H4N2 (4H-Imidazole)

using model chemistry: MP3/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP3/cc-pVDZ
 hartrees
Energy at 0K-225.550901
Energy at 298.15K-225.556859
HF Energy-224.813847
Nuclear repulsion energy159.835086
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/cc-pVDZ
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' 3275 3105 12.07      
2 A' 3253 3083 7.28      
3 A' 3103 2942 2.79      
4 A' 1715 1625 29.08      
5 A' 1635 1550 8.75      
6 A' 1420 1346 14.44      
7 A' 1347 1277 20.86      
8 A' 1333 1263 7.67      
9 A' 1281 1214 4.08      
10 A' 1058 1003 47.95      
11 A' 1025 971 11.16      
12 A' 962 912 1.86      
13 A' 894 847 7.69      
14 A' 887 841 9.92      
15 A" 3152 2987 2.56      
16 A" 1173 1112 0.49      
17 A" 1015 962 16.47      
18 A" 970 920 0.64      
19 A" 769 729 5.77      
20 A" 566 536 18.96      
21 A" 368 349 5.75      

Unscaled Zero Point Vibrational Energy (zpe) 15599.5 cm-1
Scaled (by 0.9479) Zero Point Vibrational Energy (zpe) 14786.8 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/cc-pVDZ
ABC
0.31851 0.28882 0.15594

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3/cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -1.210 0.355 0.000
C2 0.000 1.138 0.000
N3 1.123 0.511 0.000
C4 0.740 -0.903 0.000
C5 -0.769 -0.858 0.000
H6 -0.075 2.228 0.000
H7 1.150 -1.413 0.890
H8 1.150 -1.413 -0.890
H9 -1.440 -1.723 0.000

Atom - Atom Distances (Å)
  N1 C2 N3 C4 C5 H6 H7 H8 H9
N11.44172.33842.32031.29092.19063.08023.08022.0904
C21.44171.28642.17082.13951.09282.93672.93673.2030
N32.33841.28641.46432.33512.09432.12002.12003.3995
C42.32032.17081.46431.50923.23541.10471.10472.3288
C51.29092.13952.33511.50923.16372.18642.18641.0944
H62.19061.09282.09433.23543.16373.94403.94404.1803
H73.08022.93672.12001.10472.18643.94401.77902.7554
H83.08022.93672.12001.10472.18643.94401.77902.7554
H92.09043.20303.39952.32881.09444.18032.75542.7554

picture of 4H-Imidazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 N3 117.885 N1 C2 H6 118.965
N1 C5 C4 111.679 N1 C5 H9 122.192
C2 N1 C5 102.919 C2 N3 C4 104.030
N3 C2 H6 123.150 N3 C4 C5 103.487
N3 C4 H7 110.442 N3 C4 H8 110.442
C4 C5 H9 126.129 C5 C4 H7 112.613
C5 C4 H8 112.613 H7 C4 H8 107.265
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability