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

using model chemistry: B1B95/aug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B1B95/aug-cc-pVTZ
 hartrees
Energy at 0K-226.110689
Energy at 298.15K-226.116733
HF Energy-226.110689
Nuclear repulsion energy167.571258
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 B1B95/aug-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 A1 3238 3104 15.57      
2 A1 3078 2951 0.35      
3 A1 1723 1651 21.41      
4 A1 1417 1358 0.13      
5 A1 1382 1325 34.30      
6 A1 1260 1208 4.27      
7 A1 1044 1000 0.88      
8 A1 939 900 10.48      
9 A2 1146 1098 0.00      
10 A2 939 900 0.00      
11 A2 551 528 0.00      
12 B1 3116 2986 1.59      
13 B1 1002 960 22.42      
14 B1 835 801 4.01      
15 B1 375 359 37.00      
16 B2 3224 3090 4.77      
17 B2 1796 1722 0.42      
18 B2 1396 1338 35.95      
19 B2 1242 1190 1.25      
20 B2 1085 1040 33.71      
21 B2 930 891 68.57      

Unscaled Zero Point Vibrational Energy (zpe) 15858.0 cm-1
Scaled (by 0.9585) Zero Point Vibrational Energy (zpe) 15199.9 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 B1B95/aug-cc-pVTZ
ABC
0.36454 0.30830 0.17247

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/aug-cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.192
N2 0.000 0.996 0.279
N3 0.000 -0.996 0.279
C4 0.000 0.723 -0.939
C5 0.000 -0.723 -0.939
H6 -0.889 0.000 1.824
H7 0.889 0.000 1.824
H8 0.000 1.463 -1.723
H9 0.000 -1.463 -1.723

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.35141.35142.25042.25041.09041.09043.26213.2621
N21.35141.99251.24822.10682.04202.04202.05613.1715
N31.35141.99252.10681.24822.04202.04203.17152.0561
C42.25041.24822.10681.44572.99122.99121.07862.3226
C52.25042.10681.24821.44572.99122.99122.32261.0786
H61.09042.04202.04202.99122.99121.77713.93903.9390
H71.09042.04202.04202.99122.99121.77713.93903.9390
H83.26212.05613.17151.07862.32263.93903.93902.9265
H93.26213.17152.05612.32261.07863.93903.93902.9265

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 119.860 C1 N3 C5 119.860
N2 C1 N3 94.979 N2 C1 H6 113.059
N2 C1 H7 113.059 N2 C4 C5 102.651
N2 C4 H8 124.001 N3 C1 H6 113.059
N3 C1 H7 113.059 N3 C5 C4 102.651
N3 C5 H9 124.001 C4 C5 H9 133.348
C5 C4 H8 133.348 H6 C1 H7 109.149
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.322      
2 N -0.407      
3 N -0.407      
4 C -0.406      
5 C -0.406      
6 H 0.384      
7 H 0.384      
8 H 0.590      
9 H 0.590      


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 -0.826 0.826
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -28.414 0.000 0.000
y 0.000 -35.613 0.000
z 0.000 0.000 -21.758
Traceless
 xyz
x 0.271 0.000 0.000
y 0.000 -10.526 0.000
z 0.000 0.000 10.255
Polar
3z2-r220.510
x2-y27.199
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.877 0.000 0.000
y 0.000 7.101 0.000
z 0.000 0.000 8.624


<r2> (average value of r2) Å2
<r2> 76.679
(<r2>)1/2 8.757