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

using model chemistry: ROMP2/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 ROMP2/cc-pVDZ
 hartrees
Energy at 0K-225.557264
Energy at 298.15K-225.563221
HF Energy-224.831997
Nuclear repulsion energy162.139445
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-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' 3680 3680        
2 A' 3324 3324        
3 A' 3300 3300        
4 A' 3294 3294        
5 A' 1543 1543        
6 A' 1520 1520        
7 A' 1486 1486        
8 A' 1378 1378        
9 A' 1271 1271        
10 A' 1197 1197        
11 A' 1148 1148        
12 A' 1102 1102        
13 A' 1082 1082        
14 A' 931 931        
15 A' 894 894        
16 A" 843 843        
17 A" 787 787        
18 A" 713 713        
19 A" 684 684        
20 A" 648 648        
21 A" 528 528        

Unscaled Zero Point Vibrational Energy (zpe) 15677.0 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 15677.0 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-pVDZ
ABC
0.32364 0.30718 0.15760

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 1.109 0.000
C2 -1.093 0.284 0.000
C3 1.124 0.312 0.000
N4 -0.745 -1.001 0.000
C5 0.635 -0.989 0.000
H6 -0.014 2.123 0.000
H7 -2.113 0.669 0.000
H8 2.131 0.724 0.000
H9 1.212 -1.914 0.000

Atom - Atom Distances (Å)
  N1 C2 C3 N4 C5 H6 H7 H8 H9
N11.37001.37802.23802.19271.01422.15792.16543.2571
C21.37002.21741.33142.14682.13291.08973.25413.1851
C31.37802.21742.28371.38992.13923.25611.08812.2275
N42.23801.33142.28371.37993.20882.15913.35332.1591
C52.19272.14681.38991.37993.17973.20962.27431.0898
H61.01422.13292.13923.20883.17972.55312.56104.2193
H72.15791.08973.25612.15913.20962.55314.24374.2102
H82.16543.25411.08813.35332.27432.56104.24372.7933
H93.25713.18512.22752.15911.08984.21934.21022.7933

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 111.870 N1 C2 H7 122.223
N1 C3 C5 104.778 N1 C3 H8 122.381
C2 N1 C3 107.586 C2 N1 H6 126.263
C2 N4 C5 104.694 C3 N1 H6 126.150
C3 C5 N4 111.072 C3 C5 H9 127.457
N4 C2 H7 125.907 N4 C5 H9 121.471
C5 C3 H8 132.842
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at ROMP2/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.243      
2 C 0.245      
3 C 0.028      
4 N -0.353      
5 C 0.044      
6 H 0.133      
7 H 0.059      
8 H 0.052      
9 H 0.035      


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> 80.701
(<r2>)1/2 8.983