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All results from a given calculation for C5H5N (Pyridine)

using model chemistry: HF/CEP-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at HF/CEP-31G
 hartrees
Energy at 0K-39.906546
Energy at 298.15K-39.913016
Nuclear repulsion energy103.803236
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/CEP-31G
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 3437 3098 1.92      
2 A1 3414 3077 37.45      
3 A1 3387 3053 4.42      
4 A1 1772 1597 30.89      
5 A1 1628 1467 9.27      
6 A1 1339 1207 3.76      
7 A1 1170 1055 5.45      
8 A1 1117 1007 10.22      
9 A1 1069 964 2.94      
10 A1 658 593 3.94      
11 A2 1147 1034 0.00      
12 A2 1024 923 0.00      
13 A2 443 399 0.00      
14 B1 1167 1052 0.12      
15 B1 1095 987 0.00      
16 B1 853 769 63.75      
17 B1 803 724 57.61      
18 B1 468 422 6.52      
19 B2 3424 3087 91.02      
20 B2 3402 3067 6.24      
21 B2 1761 1587 11.72      
22 B2 1586 1429 40.69      
23 B2 1496 1349 1.90      
24 B2 1321 1190 0.07      
25 B2 1248 1125 6.10      
26 B2 1157 1043 0.04      
27 B2 711 641 1.21      

Unscaled Zero Point Vibrational Energy (zpe) 21047.4 cm-1
Scaled (by 0.9014) Zero Point Vibrational Energy (zpe) 18972.2 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/CEP-31G
ABC
0.19777 0.19174 0.09735

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-31G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 1.429
C2 0.000 0.000 -1.387
C3 0.000 1.156 0.740
C4 0.000 -1.156 0.740
C5 0.000 1.212 -0.670
C6 0.000 -1.212 -0.670
H7 0.000 0.000 -2.464
H8 0.000 2.059 1.327
H9 0.000 -2.059 1.327
H10 0.000 2.161 -1.174
H11 0.000 -2.161 -1.174

Atom - Atom Distances (Å)
  N1 C2 C3 C4 C5 C6 H7 H8 H9 H10 H11
N12.81611.34551.34552.42322.42323.89312.06122.06123.38323.3832
C22.81612.42062.42061.40811.40811.07713.40633.40632.17192.1719
C31.34552.42062.31121.41052.75503.40611.07703.26742.16183.8294
C41.34552.42062.31122.75501.41053.40613.26741.07703.82942.1618
C52.42321.40811.41052.75502.42312.16532.16863.83141.07543.4105
C62.42321.40812.75501.41052.42312.16533.83142.16863.41051.0754
H73.89311.07713.40613.40612.16532.16534.31384.31382.51732.5173
H82.06123.40631.07703.26742.16863.83144.31384.11742.50264.9053
H92.06123.40633.26741.07703.83142.16864.31384.11744.90532.5026
H103.38322.17192.16183.82941.07543.41052.51732.50264.90534.3228
H113.38322.17193.82942.16183.41051.07542.51734.90532.50264.3228

picture of Pyridine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C3 C5 123.082 N1 C3 H8 116.172
N1 C4 C6 123.082 N1 C4 H9 116.172
C2 C5 C3 118.363 C2 C5 H10 121.404
C2 C6 C4 118.363 C2 C6 H11 121.404
C3 N1 C4 118.383 C3 C5 H10 120.233
C4 C6 H11 120.233 C5 C2 C6 118.728
C5 C2 H7 120.636 C5 C3 H8 120.746
C6 C2 H7 120.636 C6 C4 H9 120.746
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N 0.180      
2 C -0.436      
3 C -0.492      
4 C -0.492      
5 C 0.010      
6 C 0.010      
7 H 0.256      
8 H 0.211      
9 H 0.211      
10 H 0.272      
11 H 0.272      


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 -2.813 2.813
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -39.036 0.000 0.000
y 0.000 -28.870 0.000
z 0.000 0.000 -38.064
Traceless
 xyz
x -5.568 0.000 0.000
y 0.000 9.680 0.000
z 0.000 0.000 -4.111
Polar
3z2-r2-8.222
x2-y2-10.165
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.711 0.000 0.000
y 0.000 9.621 0.000
z 0.000 0.000 9.067


<r2> (average value of r2) Å2
<r2> 100.528
(<r2>)1/2 10.026