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: MP2/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 MP2/CEP-31G
 hartrees
Energy at 0K-34.833739
Energy at 298.15K-34.839708
HF Energy-34.421628
Nuclear repulsion energy81.134073
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 MP2/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 3686 3562 55.41      
2 A1 3268 3158 0.32      
3 A1 3236 3127 12.98      
4 A1 1474 1424 11.75      
5 A1 1404 1357 3.33      
6 A1 1127 1089 0.09      
7 A1 1095 1058 4.98      
8 A1 1024 990 42.35      
9 A1 879 850 0.39      
10 A2 780 754 0.00      
11 A2 650 629 0.00      
12 A2 597 577 0.00      
13 B1 774 748 48.47      
14 B1 698 675 247.39      
15 B1 625 604 17.27      
16 B1 544 526 62.39      
17 B2 3257 3148 21.35      
18 B2 3217 3108 2.10      
19 B2 1541 1489 6.58      
20 B2 1445 1397 19.60      
21 B2 1304 1260 0.04      
22 B2 1181 1142 0.47      
23 B2 1057 1021 27.98      
24 B2 865 835 0.98      

Unscaled Zero Point Vibrational Energy (zpe) 17864.7 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 17262.7 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 MP2/CEP-31G
ABC
0.28720 0.28233 0.14237

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-31G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 1.141
H2 0.000 0.000 2.160
C3 0.000 1.163 0.332
C4 0.000 -1.163 0.332
C5 0.000 0.734 -1.032
C6 0.000 -0.734 -1.032
H7 0.000 2.164 0.773
H8 0.000 -2.164 0.773
H9 0.000 1.391 -1.907
H10 0.000 -1.391 -1.907

Atom - Atom Distances (Å)
  N1 H2 C3 C4 C5 C6 H7 H8 H9 H10
N11.01891.41651.41652.29432.29432.19462.19463.35093.3509
H21.01892.16632.16633.27603.27602.56982.56984.29874.2987
C31.41652.16632.32551.43082.33651.09373.35542.25133.3966
C41.41652.16632.32552.33651.43083.35541.09373.39662.2513
C52.29433.27601.43082.33651.46722.30353.41391.09422.2975
C62.29433.27602.33651.43081.46723.41392.30352.29751.0942
H72.19462.56981.09373.35542.30353.41394.32712.78984.4520
H82.19462.56983.35541.09373.41392.30354.32714.45202.7898
H93.35094.29872.25133.39661.09422.29752.78984.45202.7818
H103.35094.29873.39662.25132.29751.09424.45202.78982.7818

picture of Pyrrole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C3 C5 107.374 N1 C3 H7 121.391
N1 C4 C6 107.374 N1 C4 H8 121.391
H2 N1 C3 124.827 H2 N1 C4 124.827
C3 N1 C4 110.345 C3 C5 C6 107.454
C3 C5 H9 125.624 C4 C6 C5 107.454
C4 C6 H10 125.624 C5 C3 H7 131.235
C5 C6 H10 126.922 C6 C4 H8 131.235
C6 C5 H9 126.922
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability