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 C4H5N (Pyrrole)

using model chemistry: B2PLYP/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B2PLYP/3-21G*
 hartrees
Energy at 0K-208.704616
Energy at 298.15K 
HF Energy-208.548757
Nuclear repulsion energy159.754860
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/3-21G*
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 3625 3625 64.60      
2 A1 3322 3322 0.07      
3 A1 3296 3296 3.46      
4 A1 1490 1490 3.30      
5 A1 1407 1407 8.46      
6 A1 1167 1167 0.09      
7 A1 1103 1103 7.44      
8 A1 1034 1034 28.92      
9 A1 932 932 0.51      
10 A2 888 888 0.00      
11 A2 717 717 0.00      
12 A2 642 642 0.00      
13 B1 860 860 2.65      
14 B1 747 747 136.41      
15 B1 649 649 0.30      
16 B1 584 584 133.02      
17 B2 3312 3312 3.85      
18 B2 3286 3286 2.04      
19 B2 1575 1575 10.55      
20 B2 1439 1439 10.38      
21 B2 1341 1341 0.11      
22 B2 1181 1181 0.33      
23 B2 1071 1071 24.46      
24 B2 918 918 0.76      

Unscaled Zero Point Vibrational Energy (zpe) 18292.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 18292.9 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/3-21G*
ABC
0.29997 0.29715 0.14928

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 1.134
H2 0.000 0.000 2.144
C3 0.000 1.137 0.330
C4 0.000 -1.137 0.330
C5 0.000 0.718 -0.987
C6 0.000 -0.718 -0.987
H7 0.000 2.126 0.752
H8 0.000 -2.126 0.752
H9 0.000 1.357 -1.853
H10 0.000 -1.357 -1.853

Atom - Atom Distances (Å)
  N1 H2 C3 C4 C5 C6 H7 H8 H9 H10
N11.00971.39231.39232.23972.23972.15992.15993.28133.2813
H21.00972.14052.14053.21263.21262.54092.54094.22134.2213
C31.39232.14052.27361.38282.27501.07543.28992.19473.3147
C41.39232.14052.27362.27501.38283.28991.07543.31472.1947
C52.23973.21261.38282.27501.43532.23833.33361.07642.2481
C62.23973.21262.27501.38281.43533.33362.23832.24811.0764
H72.15992.54091.07543.28992.23833.33364.25182.71684.3497
H82.15992.54093.28991.07543.33362.23834.25184.34972.7168
H93.28134.22132.19473.31471.07642.24812.71684.34972.7140
H103.28134.22133.31472.19472.24811.07644.34972.71682.7140

picture of Pyrrole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C3 C5 107.622 N1 C3 H7 121.625
N1 C4 C6 107.622 N1 C4 H8 121.625
H2 N1 C3 125.267 H2 N1 C4 125.267
C3 N1 C4 109.466 C3 C5 C6 107.645
C3 C5 H9 125.915 C4 C6 C5 107.645
C4 C6 H10 125.915 C5 C3 H7 130.754
C5 C6 H10 126.440 C6 C4 H8 130.754
C6 C5 H9 126.440
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.697      
2 H 0.327      
3 C 0.060      
4 C 0.060      
5 C -0.257      
6 C -0.257      
7 H 0.204      
8 H 0.204      
9 H 0.179      
10 H 0.179      


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 2.008 2.008
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -33.988 0.000 0.000
y 0.000 -26.391 0.000
z 0.000 0.000 -23.321
Traceless
 xyz
x -9.132 0.000 0.000
y 0.000 2.263 0.000
z 0.000 0.000 6.868
Polar
3z2-r213.736
x2-y2-7.597
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.826 0.000 0.000
y 0.000 7.228 0.000
z 0.000 0.000 7.187


<r2> (average value of r2) Å2
<r2> 86.449
(<r2>)1/2 9.298