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: HF/cc-pVTZ

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/cc-pVTZ
 hartrees
Energy at 0K-246.778235
Energy at 298.15K-246.784694
Nuclear repulsion energy208.437343
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-pVTZ
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 3354 3052 5.45      
2 A1 3325 3026 15.83      
3 A1 3311 3014 4.13      
4 A1 1780 1620 41.48      
5 A1 1646 1498 7.69      
6 A1 1335 1215 6.03      
7 A1 1173 1067 2.31      
8 A1 1119 1018 9.48      
9 A1 1086 988 3.82      
10 A1 658 599 5.61      
11 A2 1130 1029 0.00      
12 A2 983 895 0.00      
13 A2 436 396 0.00      
14 B1 1132 1030 0.41      
15 B1 1076 979 0.01      
16 B1 840 765 20.21      
17 B1 777 707 67.90      
18 B1 463 421 3.87      
19 B2 3346 3045 34.14      
20 B2 3311 3013 26.46      
21 B2 1770 1610 20.58      
22 B2 1593 1450 39.22      
23 B2 1499 1365 1.11      
24 B2 1300 1183 0.24      
25 B2 1164 1059 4.75      
26 B2 1143 1041 8.06      
27 B2 717 652 0.14      

Unscaled Zero Point Vibrational Energy (zpe) 20732.2 cm-1
Scaled (by 0.9101) Zero Point Vibrational Energy (zpe) 18868.4 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-pVTZ
ABC
0.20594 0.19889 0.10118

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 1.396
C2 0.000 0.000 -1.369
C3 0.000 1.128 0.716
C4 0.000 -1.128 0.716
C5 0.000 1.187 -0.665
C6 0.000 -1.187 -0.665
H7 0.000 0.000 -2.442
H8 0.000 2.033 1.295
H9 0.000 -2.033 1.295
H10 0.000 2.135 -1.166
H11 0.000 -2.135 -1.166

Atom - Atom Distances (Å)
  N1 C2 C3 C4 C5 C6 H7 H8 H9 H10 H11
N12.76491.31721.31722.37832.37833.83842.03552.03553.33503.3350
C22.76492.37022.37021.38001.38001.07353.35113.35112.14422.1442
C31.31722.37022.25581.38192.69533.35351.07463.21352.13443.7665
C41.31722.37022.25582.69531.38193.35353.21351.07463.76652.1344
C52.37831.38001.38192.69532.37392.13742.13483.76951.07223.3592
C62.37831.38002.69531.38192.37392.13743.76952.13483.35921.0722
H73.83841.07353.35353.35352.13742.13744.25464.25462.48692.4869
H82.03553.35111.07463.21352.13483.76954.25464.06602.46354.8402
H92.03553.35113.21351.07463.76952.13484.25464.06604.84022.4635
H103.33502.14422.13443.76651.07223.35922.48692.46354.84024.2692
H113.33502.14423.76652.13443.35921.07222.48694.84022.46354.2692

picture of Pyridine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C3 C5 123.545 N1 C3 H8 116.282
N1 C4 C6 123.545 N1 C4 H9 116.282
C2 C5 C3 118.224 C2 C5 H10 121.441
C2 C6 C4 118.224 C2 C6 H11 121.441
C3 N1 C4 117.808 C3 C5 H10 120.334
C4 C6 H11 120.334 C5 C2 C6 118.654
C5 C2 H7 120.673 C5 C3 H8 120.174
C6 C2 H7 120.673 C6 C4 H9 120.174
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.203 -0.669 -1.544 -0.704
2 C -0.162 0.248 -0.020 0.317
3 C -0.095 0.471 0.744 0.528
4 C -0.095 0.471 0.744 0.528
5 C -0.139 -0.452 0.022 -0.594
6 C -0.139 -0.452 0.022 -0.594
7 H 0.161 0.058 0.006 0.072
8 H 0.161 0.012 0.005 0.021
9 H 0.161 0.012 0.005 0.021
10 H 0.175 0.149 0.001 0.203
11 H 0.175 0.149 0.001 0.203


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 -2.225 2.225
CHELPG        
AIM 0.000 0.000 1.194 1.194
ESP 0.000 0.000 -2.236 2.236


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -38.296 0.000 0.000
y 0.000 -29.295 0.000
z 0.000 0.000 -36.178
Traceless
 xyz
x -5.560 0.000 0.000
y 0.000 7.942 0.000
z 0.000 0.000 -2.383
Polar
3z2-r2-4.765
x2-y2-9.001
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.774 0.000 0.000
y 0.000 10.340 0.000
z 0.000 0.000 9.579


<r2> (average value of r2) Å2
<r2> 119.533
(<r2>)1/2 10.933