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

using model chemistry: B2PLYP/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B2PLYP/6-31+G**
 hartrees
Energy at 0K-225.906372
Energy at 298.15K-225.912363
HF Energy-225.664627
Nuclear repulsion energy166.413666
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 B2PLYP/6-31+G**
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 3282 3125 11.45      
2 A1 3106 2958 0.47      
3 A1 1699 1618 22.84      
4 A1 1438 1369 6.40      
5 A1 1407 1340 20.77      
6 A1 1265 1204 4.14      
7 A1 1045 996 1.00      
8 A1 934 889 9.84      
9 A2 1154 1099 0.00      
10 A2 897 854 0.00      
11 A2 537 512 0.00      
12 B1 3151 3001 0.81      
13 B1 1020 971 22.00      
14 B1 825 786 7.01      
15 B1 356 339 40.68      
16 B2 3268 3113 3.65      
17 B2 1767 1682 0.82      
18 B2 1402 1335 39.04      
19 B2 1259 1199 1.64      
20 B2 1091 1039 40.23      
21 B2 931 886 65.17      

Unscaled Zero Point Vibrational Energy (zpe) 15915.8 cm-1
Scaled (by 0.9524) Zero Point Vibrational Energy (zpe) 15158.2 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 B2PLYP/6-31+G**
ABC
0.36257 0.30183 0.17006

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/6-31+G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.206
N2 0.000 0.997 0.283
N3 0.000 -0.997 0.283
C4 0.000 0.726 -0.951
C5 0.000 -0.726 -0.951
H6 -0.894 0.000 1.835
H7 0.894 0.000 1.835
H8 0.000 1.473 -1.732
H9 0.000 -1.473 -1.732

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.35901.35902.27622.27621.09301.09303.28713.2871
N21.35901.99411.26312.11962.05012.05012.07063.1879
N31.35901.99412.11961.26312.05012.05013.18792.0706
C42.27621.26312.11961.45303.01493.01491.08072.3344
C52.27622.11961.26311.45303.01493.01492.33441.0807
H61.09302.05012.05013.01493.01491.78763.96183.9618
H71.09302.05012.05013.01493.01491.78763.96183.9618
H83.28712.07063.18791.08072.33443.96183.96182.9465
H93.28713.18792.07062.33441.08073.96183.96182.9465

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 120.435 C1 N3 C5 120.435
N2 C1 N3 94.393 N2 C1 H6 113.020
N2 C1 H7 113.020 N2 C4 C5 102.369
N2 C4 H8 123.925 N3 C1 H6 113.020
N3 C1 H7 113.020 N3 C5 C4 102.369
N3 C5 H9 123.925 C4 C5 H9 133.706
C5 C4 H8 133.706 H6 C1 H7 109.728
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.085      
2 N -0.303      
3 N -0.303      
4 C -0.004      
5 C -0.004      
6 H 0.189      
7 H 0.189      
8 H 0.161      
9 H 0.161      


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 4.562 0.000 0.000
y 0.000 6.760 0.000
z 0.000 0.000 8.442


<r2> (average value of r2) Å2
<r2> 77.761
(<r2>)1/2 8.818