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: BLYP/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 2B1
Energy calculated at BLYP/STO-3G
 hartrees
Energy at 0K-222.580498
Energy at 298.15K-222.584055
HF Energy-222.580498
Nuclear repulsion energy145.810591
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/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 3362 3110 6.54      
2 A1 3341 3091 9.00      
3 A1 1375 1272 0.33      
4 A1 1236 1143 26.61      
5 A1 1044 966 16.83      
6 A1 940 869 24.93      
7 A1 841 778 0.00      
8 A2 812 751 0.00      
9 A2 532 492 0.00      
10 B1 775 717 6.72      
11 B1 673 622 14.98      
12 B1 436 403 13.26      
13 B2 3342 3092 2.33      
14 B2 1481 1370 0.43      
15 B2 1242 1149 0.39      
16 B2 1121 1037 0.21      
17 B2 909 841 19.47      
18 B2 405 375 8.55      

Unscaled Zero Point Vibrational Energy (zpe) 11931.8 cm-1
Scaled (by 0.9252) Zero Point Vibrational Energy (zpe) 11039.3 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 BLYP/STO-3G
ABC
0.32960 0.27227 0.14910

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.143
N2 0.000 1.256 0.384
N3 0.000 -1.256 0.384
C4 0.000 0.755 -0.907
C5 0.000 -0.755 -0.907
H6 0.000 0.000 2.256
H7 0.000 1.420 -1.796
H8 0.000 -1.420 -1.796

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8
C11.46741.46742.18462.18461.11323.26343.2634
N21.46742.51161.38462.38962.25442.18553.4508
N31.46742.51162.38961.38462.25443.45082.1855
C42.18461.38462.38961.51023.25201.10962.3493
C52.18462.38961.38461.51023.25202.34931.1096
H61.11322.25442.25443.25203.25204.29314.2931
H73.26342.18553.45081.10962.34934.29312.8395
H83.26343.45082.18552.34931.10964.29312.8395

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 99.950 C1 N3 C5 99.950
N2 C1 N3 117.700 N2 C1 H6 121.150
N2 C4 C5 111.200 N2 C4 H7 122.001
N3 C1 H6 121.150 N3 C5 C4 111.200
N3 C5 H8 122.001 C4 C5 H8 126.799
C5 C4 H7 126.799
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.096      
2 N -0.212      
3 N -0.212      
4 C 0.010      
5 C 0.010      
6 H 0.106      
7 H 0.101      
8 H 0.101      


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 -1.264 1.264
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.622 0.000 0.000
y 0.000 -31.934 0.000
z 0.000 0.000 -21.842
Traceless
 xyz
x 0.265 0.000 0.000
y 0.000 -7.701 0.000
z 0.000 0.000 7.436
Polar
3z2-r214.872
x2-y25.311
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.114 0.000 0.000
y 0.000 3.752 0.000
z 0.000 0.000 5.319


<r2> (average value of r2) Å2
<r2> 81.001
(<r2>)1/2 9.000