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

using model chemistry: CCSD=FULL/aug-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 CCSD=FULL/aug-cc-pVDZ
 hartrees
Energy at 0K-225.612289
Energy at 298.15K-225.618225
HF Energy-224.826537
Nuclear repulsion energy159.503072
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 CCSD=FULL/aug-cc-pVDZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3253 3253 9.33      
2 A' 3230 3230 7.70      
3 A' 3069 3069 4.57      
4 A' 1665 1665 39.58      
5 A' 1583 1583 11.51      
6 A' 1422 1422 12.97      
7 A' 1329 1329 24.95      
8 A' 1319 1319 7.31      
9 A' 1272 1272 2.79      
10 A' 1039 1039 51.33      
11 A' 1009 1009 11.86      
12 A' 954 954 1.87      
13 A' 881 881 4.82      
14 A' 873 873 8.90      
15 A" 3115 3115 2.35      
16 A" 1168 1168 0.56      
17 A" 1006 1006 16.96      
18 A" 962 962 0.24      
19 A" 762 762 4.60      
20 A" 557 557 21.21      
21 A" 368 368 4.08      

Unscaled Zero Point Vibrational Energy (zpe) 15417.2 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 15417.2 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 CCSD=FULL/aug-cc-pVDZ
ABC
0.31592 0.28874 0.15531

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -1.210 0.358 0.000
C2 0.000 1.145 0.000
N3 1.124 0.509 0.000
C4 0.740 -0.908 0.000
C5 -0.770 -0.861 0.000
H6 -0.073 2.234 0.000
H7 1.148 -1.415 0.891
H8 1.148 -1.415 -0.891
H9 -1.443 -1.722 0.000

Atom - Atom Distances (Å)
  N1 C2 N3 C4 C5 H6 H7 H8 H9
N11.44312.33852.32461.29642.19313.08213.08212.0934
C21.44311.29162.18262.14901.09112.94432.94433.2101
N32.33851.29161.46832.33722.09972.12062.12063.4011
C42.32462.18261.46831.51003.24551.10361.10362.3297
C51.29642.14902.33721.51003.17242.18622.18621.0931
H62.19311.09112.09973.24553.17243.95003.95004.1865
H73.08212.94432.12061.10362.18623.95001.78192.7575
H83.08212.94432.12061.10362.18623.95001.78192.7575
H92.09343.21013.40112.32971.09314.18652.75752.7575

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 117.433 N1 C2 H6 119.202
N1 C5 C4 111.627 N1 C5 H9 122.120
C2 N1 C5 103.207 C2 N3 C4 104.344
N3 C2 H6 123.365 N3 C4 C5 103.389
N3 C4 H7 110.275 N3 C4 H8 110.275
C4 C5 H9 126.254 C5 C4 H7 112.610
C5 C4 H8 112.610 H7 C4 H8 107.666
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability