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

using model chemistry: BLYP/TZVP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at BLYP/TZVP
 hartrees
Energy at 0K-226.117210
Energy at 298.15K-226.123138
HF Energy-226.117210
Nuclear repulsion energy165.980719
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 BLYP/TZVP
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 3134 3126 19.53      
2 A1 2969 2962 0.00      
3 A1 1628 1624 23.27      
4 A1 1363 1359 7.67      
5 A1 1343 1340 20.54      
6 A1 1215 1212 6.39      
7 A1 998 995 3.93      
8 A1 891 888 10.27      
9 A2 1109 1107 0.00      
10 A2 877 875 0.00      
11 A2 532 530 0.00      
12 B1 2994 2987 0.40      
13 B1 980 978 16.96      
14 B1 803 801 6.18      
15 B1 359 358 39.88      
16 B2 3121 3113 9.63      
17 B2 1689 1685 1.39      
18 B2 1322 1318 32.40      
19 B2 1210 1207 1.40      
20 B2 1048 1045 33.85      
21 B2 912 910 72.82      

Unscaled Zero Point Vibrational Energy (zpe) 15247.8 cm-1
Scaled (by 0.9975) Zero Point Vibrational Energy (zpe) 15209.7 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 BLYP/TZVP
ABC
0.36070 0.30024 0.16916

See section I.F.4 to change rotational constant units
Geometric Data calculated at BLYP/TZVP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.208
N2 0.000 0.997 0.283
N3 0.000 -0.997 0.283
C4 0.000 0.731 -0.953
C5 0.000 -0.731 -0.953
H6 -0.895 0.000 1.850
H7 0.895 0.000 1.850
H8 0.000 1.484 -1.738
H9 0.000 -1.484 -1.738

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.36031.36032.28132.28131.10141.10143.29903.2990
N21.36031.99441.26412.12472.06192.06192.07893.2003
N31.36031.99442.12471.26412.06192.06193.20032.0789
C42.28131.26412.12471.46243.03183.03181.08802.3505
C52.28132.12471.26411.46243.03183.03182.35051.0880
H61.10142.06192.06193.03183.03181.78993.98483.9848
H71.10142.06192.06193.03183.03181.78993.98483.9848
H83.29902.07893.20031.08802.35053.98483.98482.9685
H93.29903.20032.07892.35051.08803.98483.98482.9685

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 120.707 C1 N3 C5 120.707
N2 C1 N3 94.290 N2 C1 H6 113.355
N2 C1 H7 113.355 N2 C4 C5 102.148
N2 C4 H8 124.053 N3 C1 H6 113.355
N3 C1 H7 113.355 N3 C5 C4 102.148
N3 C5 H9 124.053 C4 C5 H9 133.799
C5 C4 H8 133.799 H6 C1 H7 108.695
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.266      
2 N -0.066      
3 N -0.066      
4 C -0.094      
5 C -0.094      
6 H 0.181      
7 H 0.181      
8 H 0.111      
9 H 0.111      


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 -0.608 0.608
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -28.693 0.000 0.000
y 0.000 -36.259 0.000
z 0.000 0.000 -22.343
Traceless
 xyz
x 0.608 0.000 0.000
y 0.000 -10.741 0.000
z 0.000 0.000 10.133
Polar
3z2-r220.266
x2-y27.566
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.458 0.000 0.000
y 0.000 6.375 0.000
z 0.000 0.000 8.809


<r2> (average value of r2) Å2
<r2> 78.179
(<r2>)1/2 8.842