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: CCSD=FULL/TZVP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at CCSD=FULL/TZVP
 hartrees
Energy at 0K-209.722193
Energy at 298.15K 
HF Energy-208.876529
Nuclear repulsion energy161.182304
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 CCSD=FULL/TZVP
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 3726 3530 74.76      
2 A1 3312 3138 0.15      
3 A1 3290 3117 3.26      
4 A1 1536 1455 13.30      
5 A1 1446 1370 5.12      
6 A1 1187 1125 2.88      
7 A1 1110 1052 14.02      
8 A1 1051 996 28.83      
9 A1 907 860 0.41      
10 A2 703 666 0.00      
11 A2 606 574 0.00      
12 A2 32 30 0.00      
13 B1 741 703 14.39      
14 B1 685 649 173.01      
15 B1 594 563 0.85      
16 B1 189 179 55.67      
17 B2 3305 3132 4.19      
18 B2 3279 3107 2.57      
19 B2 1610 1526 2.67      
20 B2 1490 1412 11.69      
21 B2 1339 1269 0.86      
22 B2 1183 1121 1.31      
23 B2 1089 1032 21.33      
24 B2 886 840 1.83      

Unscaled Zero Point Vibrational Energy (zpe) 17648.5 cm-1
Scaled (by 0.9475) Zero Point Vibrational Energy (zpe) 16722.0 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 CCSD=FULL/TZVP
ABC
0.30609 0.30220 0.15207

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD=FULL/TZVP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 1.120
H2 0.000 0.000 2.124
C3 0.000 1.122 0.329
C4 0.000 -1.122 0.329
C5 0.000 0.713 -0.980
C6 0.000 -0.713 -0.980
H7 0.000 2.107 0.762
H8 0.000 -2.107 0.762
H9 0.000 1.359 -1.842
H10 0.000 -1.359 -1.842

Atom - Atom Distances (Å)
  N1 H2 C3 C4 C5 C6 H7 H8 H9 H10
N11.00351.37251.37252.21812.21812.13732.13733.25883.2588
H21.00352.11612.11613.18473.18472.50882.50884.19184.1918
C31.37252.11612.24341.37182.25421.07613.25762.18403.2966
C41.37252.11612.24342.25421.37183.25761.07613.29662.1840
C52.21813.18471.37182.25421.42622.23113.31481.07682.2441
C62.21813.18472.25421.37181.42623.31482.23112.24411.0768
H72.13732.50881.07613.25762.23113.31484.21402.70904.3350
H82.13732.50883.25761.07613.31482.23114.21404.33502.7090
H93.25884.19182.18403.29661.07682.24412.70904.33502.7180
H103.25884.19183.29662.18402.24411.07684.33502.70902.7180

picture of Pyrrole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C3 C5 107.856 N1 C3 H7 121.112
N1 C4 C6 107.856 N1 C4 H8 121.112
H2 N1 C3 125.186 H2 N1 C4 125.186
C3 N1 C4 109.629 C3 C5 C6 107.330
C3 C5 H9 125.813 C4 C6 C5 107.330
C4 C6 H10 125.813 C5 C3 H7 131.032
C5 C6 H10 126.857 C6 C4 H8 131.032
C6 C5 H9 126.857
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability