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: B1B95/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B1B95/3-21G
 hartrees
Energy at 0K-208.916099
Energy at 298.15K-208.922353
HF Energy-208.916099
Nuclear repulsion energy160.538676
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 B1B95/3-21G
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 3644 3486 68.30      
2 A1 3327 3183 0.00      
3 A1 3300 3157 2.46      
4 A1 1493 1428 4.10      
5 A1 1420 1358 7.11      
6 A1 1175 1124 1.46      
7 A1 1113 1065 6.33      
8 A1 1041 996 30.90      
9 A1 925 885 0.44      
10 A2 921 881 0.00      
11 A2 737 705 0.00      
12 A2 643 615 0.00      
13 B1 883 845 1.53      
14 B1 756 724 142.77      
15 B1 652 624 4.46      
16 B1 621 594 138.85      
17 B2 3318 3174 2.24      
18 B2 3288 3145 2.35      
19 B2 1584 1516 11.00      
20 B2 1448 1386 9.25      
21 B2 1331 1273 0.11      
22 B2 1183 1132 1.97      
23 B2 1077 1031 28.43      
24 B2 908 869 0.73      

Unscaled Zero Point Vibrational Energy (zpe) 18393.5 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 17597.1 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 B1B95/3-21G
ABC
0.30321 0.30010 0.15082

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 1.126
H2 0.000 0.000 2.135
C3 0.000 1.130 0.330
C4 0.000 -1.130 0.330
C5 0.000 0.713 -0.983
C6 0.000 -0.713 -0.983
H7 0.000 2.119 0.752
H8 0.000 -2.119 0.752
H9 0.000 1.353 -1.848
H10 0.000 -1.353 -1.848

Atom - Atom Distances (Å)
  N1 H2 C3 C4 C5 C6 H7 H8 H9 H10
N11.00881.38231.38232.22642.22642.15182.15183.26773.2677
H21.00882.12952.12953.19843.19842.53062.53064.20684.2068
C31.38232.12952.25981.37722.26301.07513.27612.18973.3028
C41.38232.12952.25982.26301.37723.27611.07513.30282.1897
C52.22643.19841.37722.26301.42692.23223.32111.07602.2401
C62.22643.19842.26301.37721.42693.32112.23222.24011.0760
H72.15182.53061.07513.27612.23223.32114.23792.71044.3372
H82.15182.53063.27611.07513.32112.23224.23794.33722.7104
H93.26774.20682.18973.30281.07602.24012.71044.33722.7053
H103.26774.20683.30282.18972.24011.07604.33722.71042.7053

picture of Pyrrole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C3 C5 107.572 N1 C3 H7 121.743
N1 C4 C6 107.572 N1 C4 H8 121.743
H2 N1 C3 125.174 H2 N1 C4 125.174
C3 N1 C4 109.653 C3 C5 C6 107.601
C3 C5 H9 125.956 C4 C6 C5 107.601
C4 C6 H10 125.956 C5 C3 H7 130.685
C5 C6 H10 126.443 C6 C4 H8 130.685
C6 C5 H9 126.443
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.721      
2 H 0.337      
3 C 0.051      
4 C 0.051      
5 C -0.275      
6 C -0.275      
7 H 0.221      
8 H 0.221      
9 H 0.195      
10 H 0.195      


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 2.006 2.006
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -33.836 0.000 0.000
y 0.000 -25.848 0.000
z 0.000 0.000 -22.791
Traceless
 xyz
x -9.516 0.000 0.000
y 0.000 2.465 0.000
z 0.000 0.000 7.051
Polar
3z2-r214.103
x2-y2-7.987
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.876 0.000 0.000
y 0.000 7.264 0.000
z 0.000 0.000 7.167


<r2> (average value of r2) Å2
<r2> 85.535
(<r2>)1/2 9.249