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 C5H5N (Pyridine)

using model chemistry: PBEPBE/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 PBEPBE/3-21G
 hartrees
Energy at 0K-246.598039
Energy at 298.15K-246.604102
Nuclear repulsion energy203.950454
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 PBEPBE/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 3154 3126 3.86      
2 A1 3128 3100 4.89      
3 A1 3108 3080 12.16      
4 A1 1552 1538 15.91      
5 A1 1469 1456 8.40      
6 A1 1227 1216 1.05      
7 A1 1083 1073 0.08      
8 A1 1035 1026 7.90      
9 A1 963 954 3.58      
10 A1 615 610 3.71      
11 A2 994 985 0.00      
12 A2 889 881 0.00      
13 A2 365 362 0.00      
14 B1 1014 1005 0.04      
15 B1 946 937 0.25      
16 B1 764 757 2.04      
17 B1 711 705 84.36      
18 B1 413 409 3.03      
19 B2 3143 3114 24.36      
20 B2 3103 3075 23.03      
21 B2 1549 1535 2.50      
22 B2 1438 1425 27.87      
23 B2 1377 1364 0.51      
24 B2 1239 1228 1.45      
25 B2 1186 1175 1.15      
26 B2 1051 1041 0.24      
27 B2 668 662 0.56      

Unscaled Zero Point Vibrational Energy (zpe) 19091.8 cm-1
Scaled (by 0.9909) Zero Point Vibrational Energy (zpe) 18918.1 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 PBEPBE/3-21G
ABC
0.19692 0.19074 0.09689

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 1.438
C2 0.000 0.000 -1.393
C3 0.000 1.160 0.725
C4 0.000 -1.160 0.725
C5 0.000 1.209 -0.678
C6 0.000 -1.209 -0.678
H7 0.000 0.000 -2.486
H8 0.000 2.086 1.308
H9 0.000 -2.086 1.308
H10 0.000 2.170 -1.196
H11 0.000 -2.170 -1.196

Atom - Atom Distances (Å)
  N1 C2 C3 C4 C5 C6 H7 H8 H9 H10 H11
N12.83101.36111.36112.43682.43683.92372.08972.08973.41313.4131
C22.83102.41472.41471.40471.40471.09283.41273.41272.17932.1793
C31.36112.41472.31901.40372.75283.41381.09443.29712.17093.8444
C41.36112.41472.31902.75281.40373.41383.29711.09443.84442.1709
C52.43681.40471.40372.75282.41792.17502.17093.84691.09233.4189
C62.43681.40472.75281.40372.41792.17503.84692.17093.41891.0923
H73.92371.09283.41383.41382.17502.17504.32954.32952.52472.5247
H82.08973.41271.09443.29712.17093.84694.32954.17122.50584.9382
H92.08973.41273.29711.09443.84692.17094.32954.17124.93822.5058
H103.41312.17932.17093.84441.09233.41892.52472.50584.93824.3409
H113.41312.17933.84442.17093.41891.09232.52474.93822.50584.3409

picture of Pyridine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C3 C5 123.602 N1 C3 H8 116.218
N1 C4 C6 123.602 N1 C4 H9 116.218
C2 C5 C3 118.591 C2 C5 H10 121.061
C2 C6 C4 118.591 C2 C6 H11 121.061
C3 N1 C4 116.833 C3 C5 H10 120.348
C4 C6 H11 120.348 C5 C2 C6 118.780
C5 C2 H7 120.610 C5 C3 H8 120.180
C6 C2 H7 120.610 C6 C4 H9 120.180
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.494      
2 C -0.165      
3 C 0.035      
4 C 0.035      
5 C -0.237      
6 C -0.237      
7 H 0.212      
8 H 0.221      
9 H 0.221      
10 H 0.204      
11 H 0.204      


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 -2.212 2.212
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -38.100 0.000 0.000
y 0.000 -28.743 0.000
z 0.000 0.000 -35.707
Traceless
 xyz
x -5.875 0.000 0.000
y 0.000 8.161 0.000
z 0.000 0.000 -2.286
Polar
3z2-r2-4.571
x2-y2-9.357
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.366 0.000 0.000
y 0.000 9.917 0.000
z 0.000 0.000 8.805


<r2> (average value of r2) Å2
<r2> 123.546
(<r2>)1/2 11.115