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All results from a given calculation for C3H4N2 (1H-Imidazole)

using model chemistry: B2PLYP/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B2PLYP/6-31G*
 hartrees
Energy at 0K-225.976344
Energy at 298.15K-225.982262
HF Energy-225.741003
Nuclear repulsion energy162.991145
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/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3676 3489 53.20      
2 A' 3324 3155 2.05      
3 A' 3299 3131 1.65      
4 A' 3294 3127 6.55      
5 A' 1577 1497 11.94      
6 A' 1529 1451 17.77      
7 A' 1465 1390 18.07      
8 A' 1390 1319 9.28      
9 A' 1301 1235 0.63      
10 A' 1177 1117 4.81      
11 A' 1168 1109 2.51      
12 A' 1116 1059 17.74      
13 A' 1092 1037 33.79      
14 A' 946 898 1.68      
15 A' 907 861 8.09      
16 A" 845 802 8.58      
17 A" 797 757 34.23      
18 A" 712 676 21.89      
19 A" 684 649 3.26      
20 A" 644 611 18.13      
21 A" 502 476 99.60      

Unscaled Zero Point Vibrational Energy (zpe) 15722.1 cm-1
Scaled (by 0.9492) Zero Point Vibrational Energy (zpe) 14923.4 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/6-31G*
ABC
0.32519 0.31206 0.15925

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 1.106 0.000
C2 -1.090 0.282 0.000
C3 1.121 0.301 0.000
N4 -0.743 -0.989 0.000
C5 0.636 -0.983 0.000
H6 -0.010 2.115 0.000
H7 -2.101 0.663 0.000
H8 2.119 0.708 0.000
H9 1.198 -1.905 0.000

Atom - Atom Distances (Å)
  N1 C2 C3 N4 C5 H6 H7 H8 H9
N11.36651.37982.22272.18391.00892.14772.15623.2409
C21.36652.21081.31732.14022.12761.08033.23733.1656
C31.37982.21082.26651.37262.13723.24211.07822.2076
N42.22271.31732.26651.37913.18922.13793.32732.1470
C52.18392.14021.37261.37913.16473.19392.24931.0800
H61.00892.12762.13723.18923.16472.54662.55174.1976
H72.14771.08033.24212.13793.19392.54664.22074.1810
H82.15623.23731.07823.32732.24932.55174.22072.7704
H93.24093.16562.20762.14701.08004.19764.18102.7704

picture of 1H-Imidazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 N4 111.813 N1 C2 H7 122.305
N1 C3 C5 105.016 N1 C3 H8 122.141
C2 N1 C3 107.224 C2 N1 H6 126.538
C2 N4 C5 105.041 C3 N1 H6 126.238
C3 C5 N4 110.906 C3 C5 H9 127.939
N4 C2 H7 125.883 N4 C5 H9 121.155
C5 C3 H8 132.842
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.568      
2 C 0.192      
3 C 0.001      
4 N -0.423      
5 C -0.048      
6 H 0.353      
7 H 0.170      
8 H 0.170      
9 H 0.153      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.147 3.602 0.000 3.780
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.271 -3.193 0.000
y -3.193 -25.212 0.000
z 0.000 0.000 -31.311
Traceless
 xyz
x 1.990 -3.193 0.000
y -3.193 3.579 0.000
z 0.000 0.000 -5.569
Polar
3z2-r2-11.139
x2-y2-1.059
xy-3.193
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.981 -0.195 0.000
y -0.195 6.733 0.000
z 0.000 0.000 2.568


<r2> (average value of r2) Å2
<r2> 79.808
(<r2>)1/2 8.934