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

using model chemistry: B2PLYP/STO-3G

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/STO-3G
 hartrees
Energy at 0K-222.854655
Energy at 298.15K-222.860298
HF Energy-222.755911
Nuclear repulsion energy163.277599
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/STO-3G
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 3518 3518 11.72      
2 A1 3365 3365 22.46      
3 A1 1776 1776 11.11      
4 A1 1557 1557 9.92      
5 A1 1418 1418 2.62      
6 A1 1334 1334 7.21      
7 A1 1064 1064 1.74      
8 A1 938 938 8.98      
9 A2 1198 1198 0.00      
10 A2 881 881 0.00      
11 A2 548 548 0.00      
12 B1 3471 3471 12.31      
13 B1 1064 1064 4.90      
14 B1 813 813 4.11      
15 B1 274 274 32.54      
16 B2 3501 3501 0.47      
17 B2 1821 1821 1.38      
18 B2 1410 1410 5.99      
19 B2 1281 1281 10.43      
20 B2 1094 1094 9.29      
21 B2 962 962 59.33      

Unscaled Zero Point Vibrational Energy (zpe) 16643.3 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 16643.3 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/STO-3G
ABC
0.35586 0.28542 0.16358

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/STO-3G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.255
N2 0.000 1.000 0.282
N3 0.000 -1.000 0.282
C4 0.000 0.740 -0.976
C5 0.000 -0.740 -0.976
H6 -0.916 0.000 1.880
H7 0.916 0.000 1.880
H8 0.000 1.505 -1.764
H9 0.000 -1.505 -1.764

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.39471.39472.35012.35011.10891.10893.37293.3729
N21.39471.99921.28462.14662.09532.09532.10763.2339
N31.39471.99922.14661.28462.09532.09533.23392.1076
C42.35011.28462.14661.47943.08883.08881.09832.3787
C52.35012.14661.28461.47943.08883.08882.37871.0983
H61.10892.09532.09533.08883.08881.83204.04724.0472
H71.10892.09532.09533.08883.08881.83204.04724.0472
H83.37292.10763.23391.09832.37874.04724.04723.0093
H93.37293.23392.10762.37871.09834.04724.04723.0093

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 122.541 C1 N3 C5 122.541
N2 C1 N3 91.573 N2 C1 H6 113.142
N2 C1 H7 113.142 N2 C4 C5 101.672
N2 C4 H8 124.184 N3 C1 H6 113.142
N3 C1 H7 113.142 N3 C5 C4 101.672
N3 C5 H9 124.184 C4 C5 H9 134.143
C5 C4 H8 134.143 H6 C1 H7 111.391
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.010      
2 N -0.250      
3 N -0.250      
4 C 0.016      
5 C 0.016      
6 H 0.134      
7 H 0.134      
8 H 0.096      
9 H 0.096      


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 -0.239 0.239
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.019 0.000 0.000
y 0.000 -32.073 0.000
z 0.000 0.000 -21.661
Traceless
 xyz
x 0.848 0.000 0.000
y 0.000 -8.233 0.000
z 0.000 0.000 7.385
Polar
3z2-r214.771
x2-y26.054
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.589 0.000 0.000
y 0.000 2.541 0.000
z 0.000 0.000 5.107


<r2> (average value of r2) Å2
<r2> 78.645
(<r2>)1/2 8.868