return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for C3H3N2 (imidazolyl radical)

using model chemistry: HF/daug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 2B1
Energy calculated at HF/daug-cc-pVTZ
 hartrees
Energy at 0K-224.282515
Energy at 298.15K-224.287170
HF Energy-224.282515
Nuclear repulsion energy154.791824
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 HF/daug-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 3396 3072 3.82      
2 A1 3378 3056 11.46      
3 A1 1577 1426 20.61      
4 A1 1395 1262 71.66      
5 A1 1231 1113 22.69      
6 A1 1041 941 0.05      
7 A1 988 894 3.15      
8 A2 944 854 0.00      
9 A2 602 545 0.00      
10 B1 923 835 0.03      
11 B1 841 761 23.77      
12 B1 607 549 35.71      
13 B2 3366 3045 0.82      
14 B2 1638 1482 24.39      
15 B2 1403 1269 0.02      
16 B2 1235 1118 18.08      
17 B2 1113 1007 45.08      
18 B2 884 799 3.92      

Unscaled Zero Point Vibrational Energy (zpe) 13279.6 cm-1
Scaled (by 0.9046) Zero Point Vibrational Energy (zpe) 12012.7 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 HF/daug-cc-pVTZ
ABC
0.36215 0.31408 0.16820

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.089
N2 0.000 1.145 0.366
N3 0.000 -1.145 0.366
C4 0.000 0.737 -0.866
C5 0.000 -0.737 -0.866
H6 0.000 0.000 2.158
H7 0.000 1.397 -1.710
H8 0.000 -1.397 -1.710

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8
C11.35381.35382.08922.08921.06913.12753.1275
N21.35382.28981.29832.24952.12612.09103.2816
N31.35382.28982.24951.29832.12613.28162.0910
C42.08921.29832.24951.47383.11251.07082.2942
C52.08922.24951.29831.47383.11252.29421.0708
H61.06912.12612.12613.11253.11254.11184.1118
H73.12752.09103.28161.07082.29424.11182.7934
H83.12753.28162.09102.29421.07084.11182.7934

picture of imidazolyl radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C4 103.937 C1 N3 C5 103.937
N2 C1 N3 115.495 N2 C1 H6 122.252
N2 C4 C5 108.316 N2 C4 H7 123.644
N3 C1 H6 122.252 N3 C5 C4 108.316
N3 C5 H8 123.644 C4 C5 H8 128.040
C5 C4 H7 128.040
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/daug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.298      
2 N -1.269      
3 N -1.269      
4 C -0.481      
5 C -0.481      
6 H 1.543      
7 H 1.128      
8 H 1.128      


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 -2.024 2.024
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -29.641 0.000 0.000
y 0.000 -34.969 0.000
z 0.000 0.000 -22.208
Traceless
 xyz
x -1.053 0.000 0.000
y 0.000 -9.045 0.000
z 0.000 0.000 10.097
Polar
3z2-r220.194
x2-y25.328
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.319 0.000 0.000
y 0.000 6.593 0.000
z 0.000 0.000 7.489


<r2> (average value of r2) Å2
<r2> 75.339
(<r2>)1/2 8.680