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: HF/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 2A2
Energy calculated at HF/cc-pVDZ
 hartrees
Energy at 0K-208.215842
Energy at 298.15K 
HF Energy-208.215842
Nuclear repulsion energy151.524144
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/cc-pVDZ
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 3418 3104 2.14      
2 A1 3378 3067 4.13      
3 A1 1708 1551 0.09      
4 A1 1577 1432 23.40      
5 A1 1262 1146 0.40      
6 A1 1169 1061 32.12      
7 A1 1085 985 0.24      
8 A1 939 852 14.25      
9 A2 1033 938 0.00      
10 A2 869 789 0.00      
11 A2 554 503 0.00      
12 B1 878 798 8.70      
13 B1 778 707 61.84      
14 B1 589 535 18.99      
15 B2 3394 3082 14.44      
16 B2 3373 3063 22.22      
17 B2 1441 1308 73.69      
18 B2 1377 1250 17.87      
19 B2 1110 1008 2.11      
20 B2 959 871 0.17      
21 B2 817i 742i 611.38      

Unscaled Zero Point Vibrational Energy (zpe) 15036.8 cm-1
Scaled (by 0.908) Zero Point Vibrational Energy (zpe) 13653.5 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/cc-pVDZ
ABC
0.33667 0.29537 0.15734

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 1.238
C2 0.000 1.061 0.428
C3 0.000 -1.061 0.428
C4 0.000 0.672 -0.983
C5 0.000 -0.672 -0.983
H6 0.000 2.068 0.820
H7 0.000 -2.068 0.820
H8 0.000 1.342 -1.827
H9 0.000 -1.342 -1.827

Atom - Atom Distances (Å)
  N1 C2 C3 C4 C5 H6 H7 H8 H9
N11.33481.33482.32042.32042.10942.10943.34673.3467
C21.33482.12131.46332.23391.08063.15272.27273.2955
C31.33482.12132.23391.46333.15271.08063.29552.2727
C42.32041.46332.23391.34312.28023.27921.07862.1839
C52.32042.23391.46331.34313.27922.28022.18391.0786
H62.10941.08063.15272.28023.27924.13512.74514.3171
H72.10943.15271.08063.27922.28024.13514.31712.7451
H83.34672.27273.29551.07862.18392.74514.31712.6848
H93.34673.29552.27272.18391.07864.31712.74512.6848

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 111.964 N1 C2 H6 121.327
N1 C3 C5 111.964 N1 C3 H7 121.327
C2 N1 C3 105.233 C2 C4 C5 105.420
C2 C4 H8 126.121 C3 C5 C4 105.420
C3 C5 H9 126.121 C4 C2 H6 126.709
C4 C5 H9 128.459 C5 C3 H7 126.709
C5 C4 H8 128.459
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.322      
2 C 0.160      
3 C 0.160      
4 C -0.072      
5 C -0.072      
6 H 0.041      
7 H 0.041      
8 H 0.032      
9 H 0.032      


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 -2.062 2.062
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.437 0.000 0.000
y 0.000 -23.191 0.000
z 0.000 0.000 -31.809
Traceless
 xyz
x -3.937 0.000 0.000
y 0.000 8.432 0.000
z 0.000 0.000 -4.495
Polar
3z2-r2-8.990
x2-y2-8.246
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.977 0.000 0.000
y 0.000 9.181 0.000
z 0.000 0.000 6.342


<r2> (average value of r2) Å2
<r2> 81.605
(<r2>)1/2 9.034