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: mPW1PW91/aug-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 mPW1PW91/aug-cc-pVTZ
 hartrees
Energy at 0K-210.197793
Energy at 298.15K 
HF Energy-210.197793
Nuclear repulsion energy161.777027
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 mPW1PW91/aug-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 3716 3560 70.08      
2 A1 3289 3151 0.02      
3 A1 3268 3131 2.14      
4 A1 1518 1454 10.40      
5 A1 1438 1378 3.12      
6 A1 1192 1142 2.99      
7 A1 1101 1055 8.52      
8 A1 1043 999 29.04      
9 A1 904 866 0.22      
10 A2 900 863 0.00      
11 A2 710 681 0.00      
12 A2 635 608 0.00      
13 B1 859 823 0.59      
14 B1 744 713 159.69      
15 B1 650 623 0.03      
16 B1 516 494 72.99      
17 B2 3283 3145 1.75      
18 B2 3257 3120 2.28      
19 B2 1590 1524 1.71      
20 B2 1472 1411 5.70      
21 B2 1317 1262 1.63      
22 B2 1168 1119 3.22      
23 B2 1075 1030 25.61      
24 B2 881 844 1.53      

Unscaled Zero Point Vibrational Energy (zpe) 18262.2 cm-1
Scaled (by 0.9581) Zero Point Vibrational Energy (zpe) 17497.0 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 mPW1PW91/aug-cc-pVTZ
ABC
0.30878 0.30422 0.15324

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/aug-cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 1.114
H2 0.000 0.000 2.115
C3 0.000 1.117 0.331
C4 0.000 -1.117 0.331
C5 0.000 0.708 -0.977
C6 0.000 -0.708 -0.977
H7 0.000 2.102 0.763
H8 0.000 -2.102 0.763
H9 0.000 1.356 -1.838
H10 0.000 -1.356 -1.838

Atom - Atom Distances (Å)
  N1 H2 C3 C4 C5 C6 H7 H8 H9 H10
N11.00131.36421.36422.20802.20802.13142.13143.24803.2480
H21.00132.10532.10533.17263.17262.49982.49984.17884.1788
C31.36422.10532.23391.37032.24561.07583.24802.18143.2886
C41.36422.10532.23392.24561.37033.24801.07583.28862.1814
C52.20803.17261.37032.24561.41672.22943.30561.07662.2361
C62.20803.17262.24561.37031.41673.30562.22942.23611.0766
H72.13142.49981.07583.24802.22943.30564.20442.70544.3264
H82.13142.49983.24801.07583.30562.22944.20444.32642.7054
H93.24804.17882.18143.28861.07662.23612.70544.32642.7111
H103.24804.17883.28862.18142.23611.07664.32642.70542.7111

picture of Pyrrole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C3 C5 107.694 N1 C3 H7 121.287
N1 C4 C6 107.694 N1 C4 H8 121.287
H2 N1 C3 125.040 H2 N1 C4 125.040
C3 N1 C4 109.920 C3 C5 C6 107.346
C3 C5 H9 125.701 C4 C6 C5 107.346
C4 C6 H10 125.701 C5 C3 H7 131.019
C5 C6 H10 126.953 C6 C4 H8 131.019
C6 C5 H9 126.953
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N 0.157      
2 H -0.006      
3 C -0.534      
4 C -0.534      
5 C -0.351      
6 C -0.351      
7 H 0.492      
8 H 0.492      
9 H 0.319      
10 H 0.319      


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 1.866 1.866
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -33.879 0.000 0.000
y 0.000 -27.007 0.000
z 0.000 0.000 -23.776
Traceless
 xyz
x -8.487 0.000 0.000
y 0.000 1.820 0.000
z 0.000 0.000 6.667
Polar
3z2-r213.334
x2-y2-6.871
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.660 0.000 0.000
y 0.000 9.316 0.000
z 0.000 0.000 8.922


<r2> (average value of r2) Å2
<r2> 84.983
(<r2>)1/2 9.219