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

using model chemistry: MP3=FULL/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=FULL/cc-pVDZ
 hartrees
Energy at 0K-225.562215
Energy at 298.15K-225.568178
HF Energy-224.814091
Nuclear repulsion energy159.952082
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=FULL/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' 3281 3085 11.91      
2 A' 3259 3064 7.15      
3 A' 3109 2923 2.67      
4 A' 1717 1615 29.19      
5 A' 1638 1540 8.79      
6 A' 1422 1337 14.70      
7 A' 1349 1269 20.84      
8 A' 1335 1255 7.75      
9 A' 1283 1206 4.11      
10 A' 1060 997 47.68      
11 A' 1027 965 11.48      
12 A' 964 906 1.85      
13 A' 896 842 7.49      
14 A' 888 835 10.25      
15 A" 3158 2969 2.43      
16 A" 1175 1105 0.48      
17 A" 1017 956 16.40      
18 A" 973 915 0.66      
19 A" 770 724 5.70      
20 A" 567 533 18.99      
21 A" 368 346 5.80      

Unscaled Zero Point Vibrational Energy (zpe) 15626.5 cm-1
Scaled (by 0.9403) Zero Point Vibrational Energy (zpe) 14693.6 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=FULL/cc-pVDZ
ABC
0.31891 0.28932 0.15617

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -1.209 0.355 0.000
C2 0.000 1.138 0.000
N3 1.122 0.510 0.000
C4 0.739 -0.902 0.000
C5 -0.768 -0.858 0.000
H6 -0.075 2.227 0.000
H7 1.149 -1.413 0.889
H8 1.149 -1.413 -0.889
H9 -1.439 -1.722 0.000

Atom - Atom Distances (Å)
  N1 C2 N3 C4 C5 H6 H7 H8 H9
N11.44052.33642.31841.29022.18893.07783.07782.0889
C21.44051.28572.16952.13821.09182.93492.93493.2008
N32.33641.28571.46312.33332.09302.11832.11833.3968
C42.31842.16951.46311.50803.23311.10371.10372.3270
C51.29022.13822.33331.50803.16172.18452.18451.0935
H62.18891.09182.09303.23313.16173.94133.94134.1774
H73.07782.93492.11831.10372.18453.94131.77722.7532
H83.07782.93492.11831.10372.18453.94131.77722.7532
H92.08893.20083.39682.32701.09354.17742.75322.7532

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 117.856 N1 C2 H6 118.987
N1 C5 C4 111.663 N1 C5 H9 122.190
C2 N1 C5 102.942 C2 N3 C4 104.046
N3 C2 H6 123.157 N3 C4 C5 103.494
N3 C4 H7 110.453 N3 C4 H8 110.453
C4 C5 H9 126.148 C5 C4 H7 112.612
C5 C4 H8 112.612 H7 C4 H8 107.243
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability