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All results from a given calculation for C3H4N2 (2H-Imidazole)

using model chemistry: HF/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at HF/cc-pVDZ
 hartrees
Energy at 0K-224.743505
Energy at 298.15K-224.749731
HF Energy-224.743505
Nuclear repulsion energy167.740780
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 HF/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 A1 3399 3086 13.89      
2 A1 3234 2937 4.66      
3 A1 1905 1730 30.10      
4 A1 1547 1405 0.02      
5 A1 1511 1372 20.70      
6 A1 1333 1210 2.18      
7 A1 1108 1006 1.95      
8 A1 1017 923 17.16      
9 A2 1253 1137 0.00      
10 A2 1034 938 0.00      
11 A2 589 535 0.00      
12 B1 3283 2981 2.52      
13 B1 1118 1015 27.77      
14 B1 915 831 4.28      
15 B1 394 358 37.70      
16 B2 3381 3070 8.17      
17 B2 1971 1790 0.01      
18 B2 1547 1405 53.47      
19 B2 1350 1226 1.65      
20 B2 1165 1057 41.97      
21 B2 999 907 72.34      

Unscaled Zero Point Vibrational Energy (zpe) 17026.0 cm-1
Scaled (by 0.908) Zero Point Vibrational Energy (zpe) 15459.6 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 HF/cc-pVDZ
ABC
0.36299 0.31012 0.17273

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.194
N2 0.000 0.997 0.274
N3 0.000 -0.997 0.274
C4 0.000 0.727 -0.933
C5 0.000 -0.727 -0.933
H6 -0.892 0.000 1.819
H7 0.892 0.000 1.819
H8 0.000 1.464 -1.723
H9 0.000 -1.464 -1.723

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.35591.35592.24772.24771.08911.08913.26343.2634
N21.35591.99351.23722.10482.04312.04312.05123.1693
N31.35591.99352.10481.23722.04312.04313.16932.0512
C42.24771.23722.10481.45452.98292.98291.08012.3293
C52.24772.10481.23721.45452.98292.98292.32931.0801
H61.08912.04312.04312.98292.98291.78383.93483.9348
H71.08912.04312.04312.98292.98291.78383.93483.9348
H83.26342.05123.16931.08012.32933.93483.93482.9281
H93.26343.16932.05122.32931.08013.93483.93482.9281

picture of 2H-Imidazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C4 120.105 C1 N3 C5 120.105
N2 C1 N3 94.630 N2 C1 H6 112.900
N2 C1 H7 112.900 N2 C4 C5 102.580
N2 C4 H8 124.406 N3 C1 H6 112.900
N3 C1 H7 112.900 N3 C5 C4 102.580
N3 C5 H9 124.406 C4 C5 H9 133.014
C5 C4 H8 133.014 H6 C1 H7 109.947
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.294      
2 N -0.321      
3 N -0.321      
4 C 0.055      
5 C 0.055      
6 H 0.076      
7 H 0.076      
8 H 0.043      
9 H 0.043      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -0.965 0.965
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -28.404 0.000 0.000
y 0.000 -34.819 0.000
z 0.000 0.000 -21.791
Traceless
 xyz
x -0.099 0.000 0.000
y 0.000 -9.721 0.000
z 0.000 0.000 9.821
Polar
3z2-r219.641
x2-y26.415
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.464 0.000 0.000
y 0.000 4.668 0.000
z 0.000 0.000 7.673


<r2> (average value of r2) Å2
<r2> 76.437
(<r2>)1/2 8.743