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: CCD/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at CCD/6-31G(2df,p)
 hartrees
Energy at 0K-209.657623
Energy at 298.15K 
HF Energy-208.831590
Nuclear repulsion energy161.318254
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 CCD/6-31G(2df,p)
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3767 3568 80.22      
2 A1 3327 3152 0.26      
3 A1 3305 3131 1.55      
4 A1 1544 1463 9.57      
5 A1 1450 1374 5.80      
6 A1 1195 1132 3.45      
7 A1 1118 1059 11.57      
8 A1 1057 1002 23.48      
9 A1 905 857 0.21      
10 A2 880 834 0.00      
11 A2 721 683 0.00      
12 A2 630 596 0.00      
13 B1 848 803 2.52      
14 B1 763 723 115.29      
15 B1 649 615 1.08      
16 B1 483 458 75.73      
17 B2 3319 3144 3.05      
18 B2 3295 3121 1.58      
19 B2 1619 1533 4.18      
20 B2 1512 1433 13.79      
21 B2 1336 1266 1.43      
22 B2 1192 1129 1.58      
23 B2 1095 1037 17.38      
24 B2 882 836 1.21      

Unscaled Zero Point Vibrational Energy (zpe) 18445.4 cm-1
Scaled (by 0.9472) Zero Point Vibrational Energy (zpe) 17471.5 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 CCD/6-31G(2df,p)
ABC
0.30679 0.30255 0.15233

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/6-31G(2df,p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 1.118
H2 0.000 0.000 2.119
C3 0.000 1.120 0.330
C4 0.000 -1.120 0.330
C5 0.000 0.713 -0.980
C6 0.000 -0.713 -0.980
H7 0.000 2.104 0.767
H8 0.000 -2.104 0.767
H9 0.000 1.360 -1.841
H10 0.000 -1.360 -1.841

Atom - Atom Distances (Å)
  N1 H2 C3 C4 C5 C6 H7 H8 H9 H10
N11.00151.36901.36902.21562.21562.13332.13333.25683.2568
H21.00152.11052.11053.18033.18032.50122.50124.18774.1877
C31.36902.11052.24011.37252.25301.07683.25382.18513.2967
C41.36902.11052.24012.25301.37253.25381.07683.29672.1851
C52.21563.18031.37252.25301.42522.23393.31491.07752.2445
C62.21563.18032.25301.37251.42523.31492.23392.24451.0775
H72.13332.50121.07683.25382.23393.31494.20862.71284.3367
H82.13332.50123.25381.07683.31492.23394.20864.33672.7128
H93.25684.18772.18513.29671.07752.24452.71284.33672.7201
H103.25684.18773.29672.18512.24451.07754.33672.71282.7201

picture of Pyrrole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C3 C5 107.834 N1 C3 H7 120.964
N1 C4 C6 107.834 N1 C4 H8 120.964
H2 N1 C3 125.103 H2 N1 C4 125.103
C3 N1 C4 109.794 C3 C5 C6 107.269
C3 C5 H9 125.799 C4 C6 C5 107.269
C4 C6 H10 125.799 C5 C3 H7 131.201
C5 C6 H10 126.932 C6 C4 H8 131.201
C6 C5 H9 126.932
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability