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

using model chemistry: ROMP2/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at ROMP2/cc-pVTZ
 hartrees
Energy at 0K-225.776252
Energy at 298.15K-225.782256
HF Energy-224.893810
Nuclear repulsion energy163.351053
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 ROMP2/cc-pVTZ
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' 3686 3686        
2 A' 3318 3318        
3 A' 3296 3296        
4 A' 3290 3290        
5 A' 1538 1538        
6 A' 1509 1509        
7 A' 1467 1467        
8 A' 1373 1373        
9 A' 1279 1279        
10 A' 1188 1188        
11 A' 1153 1153        
12 A' 1105 1105        
13 A' 1085 1085        
14 A' 935 935        
15 A' 898 898        
16 A" 866 866        
17 A" 804 804        
18 A" 731 731        
19 A" 686 686        
20 A" 654 654        
21 A" 550 550        

Unscaled Zero Point Vibrational Energy (zpe) 15705.3 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 15705.3 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 ROMP2/cc-pVTZ
ABC
0.32720 0.31282 0.15992

See section I.F.4 to change rotational constant units
Geometric Data calculated at ROMP2/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 1.102 0.000
C2 -1.089 0.284 0.000
C3 1.116 0.306 0.000
N4 -0.739 -0.991 0.000
C5 0.634 -0.983 0.000
H6 -0.012 2.107 0.000
H7 -2.095 0.663 0.000
H8 2.111 0.711 0.000
H9 1.201 -1.897 0.000

Atom - Atom Distances (Å)
  N1 C2 C3 N4 C5 H6 H7 H8 H9
N11.36151.37062.21892.17861.00512.14082.14733.2298
C21.36152.20471.32162.13772.11691.07593.22833.1618
C31.37062.20472.26321.37642.12483.23121.07442.2043
N42.21891.32162.26321.37233.18142.13893.31942.1411
C52.17862.13771.37641.37233.15623.18682.24781.0757
H61.00512.11692.12483.18143.15622.53452.54124.1830
H72.14081.07593.23122.13893.18682.53454.20704.1736
H82.14733.22831.07443.31942.24782.54124.20702.7616
H93.22983.16182.20432.14111.07574.18304.17362.7616

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 111.571 N1 C2 H7 122.442
N1 C3 C5 104.953 N1 C3 H8 122.399
C2 N1 C3 107.604 C2 N1 H6 126.225
C2 N4 C5 105.020 C3 N1 H6 126.171
C3 C5 N4 110.853 C3 C5 H9 127.619
N4 C2 H7 125.987 N4 C5 H9 121.528
C5 C3 H8 132.649
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at ROMP2/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.100      
2 C -0.021      
3 C -0.191      
4 N -0.271      
5 C -0.127      
6 H 0.196      
7 H 0.166      
8 H 0.179      
9 H 0.169      


Electric dipole moments


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.000 0.000 0.000
y 0.000 0.000 0.000
z 0.000 0.000 0.000


<r2> (average value of r2) Å2
<r2> 79.844
(<r2>)1/2 8.936