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 C4H4N (pyrrolide radical)

using model chemistry: B2PLYP/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 2A2
Energy calculated at B2PLYP/6-31G(2df,p)
 hartrees
Energy at 0K-209.332799
Energy at 298.15K-209.337394
HF Energy-209.081352
Nuclear repulsion energy151.048056
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(2df,p)
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 3289 3141 1.34      
2 A1 3239 3093 1.48      
3 A1 1567 1497 0.58      
4 A1 1447 1382 22.37      
5 A1 1215 1160 2.70      
6 A1 1103 1053 37.26      
7 A1 1062 1014 0.15      
8 A1 881 842 12.95      
9 A2 905 864 0.00      
10 A2 844 806 0.00      
11 A2 502 480 0.00      
12 B1 849 811 0.68      
13 B1 728 695 47.23      
14 B1 550 525 19.09      
15 B2 3269 3122 3.92      
16 B2 3235 3089 16.11      
17 B2 1374 1312 35.11      
18 B2 1302 1244 0.15      
19 B2 1087 1038 13.79      
20 B2 962 919 0.22      
21 B2 728 695 0.17      

Unscaled Zero Point Vibrational Energy (zpe) 15068.9 cm-1
Scaled (by 0.955) Zero Point Vibrational Energy (zpe) 14390.8 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(2df,p)
ABC
0.33401 0.29426 0.15644

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/6-31G(2df,p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 1.248
C2 0.000 1.061 0.423
C3 0.000 -1.061 0.423
C4 0.000 0.681 -0.983
C5 0.000 -0.681 -0.983
H6 0.000 2.070 0.816
H7 0.000 -2.070 0.816
H8 0.000 1.354 -1.826
H9 0.000 -1.354 -1.826

Atom - Atom Distances (Å)
  N1 C2 C3 C4 C5 H6 H7 H8 H9
N11.34401.34402.33262.33262.11442.11443.35873.3587
C21.34402.12171.45622.23841.08253.15502.26763.2995
C31.34402.12172.23841.45623.15501.08253.29952.2676
C42.33261.45622.23841.36212.27213.28641.07842.2025
C52.33262.23841.45621.36213.28642.27212.20251.0784
H62.11441.08253.15502.27213.28644.13932.73654.3239
H72.11443.15501.08253.28642.27214.13934.32392.7365
H83.35872.26763.29951.07842.20252.73654.32392.7076
H93.35873.29952.26762.20251.07844.32392.73652.7076

picture of pyrrolide radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 C4 112.756 N1 C2 H6 120.862
N1 C3 C5 112.756 N1 C3 H7 120.862
C2 N1 C3 104.250 C2 C4 C5 105.119
C2 C4 H8 126.283 C3 C5 C4 105.119
C3 C5 H9 126.283 C4 C2 H6 126.382
C4 C5 H9 128.598 C5 C3 H7 126.382
C5 C4 H8 128.598
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.232      
2 C -0.010      
3 C -0.010      
4 C -0.142      
5 C -0.142      
6 H 0.138      
7 H 0.138      
8 H 0.131      
9 H 0.131      


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 -2.006 2.006
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.492 0.000 0.000
y 0.000 -23.108 0.000
z 0.000 0.000 -31.223
Traceless
 xyz
x -3.327 0.000 0.000
y 0.000 7.749 0.000
z 0.000 0.000 -4.423
Polar
3z2-r2-8.845
x2-y2-7.384
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.175 0.000 0.000
y 0.000 8.097 0.000
z 0.000 0.000 6.951


<r2> (average value of r2) Å2
<r2> 81.602
(<r2>)1/2 9.033