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 C5H8O (Cyclopentanone)

using model chemistry: LSDA/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at LSDA/6-31G**
 hartrees
Energy at 0K-269.113865
Energy at 298.15K-269.123371
HF Energy-269.113865
Nuclear repulsion energy236.475960
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 LSDA/6-31G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A 3072 3015 3.92      
2 A 3061 3003 13.34      
3 A 2989 2933 18.00      
4 A 2977 2921 3.14      
5 A 1841 1807 201.49      
6 A 1448 1421 3.00      
7 A 1381 1355 0.01      
8 A 1297 1273 0.12      
9 A 1259 1235 4.93      
10 A 1175 1153 0.35      
11 A 1151 1130 0.01      
12 A 1028 1009 0.73      
13 A 923 906 1.35      
14 A 909 892 0.06      
15 A 811 796 0.95      
16 A 698 684 0.81      
17 A 544 534 6.75      
18 A 244 239 0.14      
19 B 3072 3014 6.52      
20 B 3065 3008 17.15      
21 B 2997 2941 29.55      
22 B 2977 2922 0.87      
23 B 1435 1408 9.27      
24 B 1382 1356 27.49      
25 B 1298 1274 4.07      
26 B 1249 1226 17.92      
27 B 1213 1190 16.31      
28 B 1147 1125 68.46      
29 B 1116 1095 1.77      
30 B 968 950 10.16      
31 B 893 876 1.52      
32 B 832 817 13.29      
33 B 571 560 2.83      
34 B 459 451 4.78      
35 B 435 427 2.25      
36 B 113 111 5.23      

Unscaled Zero Point Vibrational Energy (zpe) 26014.9 cm-1
Scaled (by 0.9813) Zero Point Vibrational Energy (zpe) 25528.4 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 LSDA/6-31G**
ABC
0.22489 0.11257 0.08134

See section I.F.4 to change rotational constant units
Geometric Data calculated at LSDA/6-31G**

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 2.126
C2 0.000 0.000 0.914
C3 0.000 1.225 0.022
C4 0.000 -1.225 0.022
C5 0.313 0.696 -1.365
C6 -0.313 -0.696 -1.365
H7 -1.026 1.643 0.064
H8 1.026 -1.643 0.064
H9 0.671 2.005 0.417
H10 -0.671 -2.005 0.417
H11 -0.058 1.338 -2.180
H12 0.058 -1.338 -2.180
H13 1.408 0.609 -1.493
H14 -1.408 -0.609 -1.493

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
O11.21182.43482.43483.57373.57372.82932.82932.71882.71884.50964.50963.93103.9310
C21.21181.51581.51582.40382.40382.11542.11542.17182.17183.37173.37172.85472.8547
C32.43481.51582.45091.51732.39081.10863.04641.10143.32252.20593.37992.15842.7648
C42.43481.51582.45092.39081.51733.04641.10863.32251.10143.37992.20592.76482.1584
C53.57372.40381.51732.39081.52702.17502.83222.23903.38201.10162.20621.10612.1640
C63.57372.40382.39081.51731.52702.83222.17503.38202.23902.20621.10162.16401.1061
H72.82932.11541.10863.04642.17502.83223.87371.77133.68132.46273.88513.06892.7640
H82.82932.11543.04641.10862.83222.17503.87373.68131.77133.88512.46272.76403.0689
H92.71882.17181.10143.32252.23903.38201.77133.68134.22802.77824.27652.47713.8473
H102.71882.17183.32251.10143.38202.23903.68131.77134.22804.27652.77823.84732.4771
H114.50963.37172.20593.37991.10162.20622.46273.88512.77824.27652.67821.77582.4666
H124.50963.37173.37992.20592.20621.10163.88512.46274.27652.77822.67822.46661.7758
H133.93102.85472.15842.76481.10612.16403.06892.76402.47713.84731.77582.46663.0684
H143.93102.85472.76482.15842.16401.10612.76403.06893.84732.47712.46661.77583.0684

picture of Cyclopentanone state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 126.055 O1 C2 C4 126.055
C2 C3 C5 104.847 C2 C3 H7 106.388
C2 C3 H9 111.174 C2 C4 C6 104.847
C2 C4 H8 106.388 C2 C4 H10 111.174
C3 C2 C4 107.890 C3 C5 C6 103.503
C3 C5 H11 113.824 C3 C5 H13 109.729
C4 C6 C5 103.503 C4 C6 H12 113.824
C4 C6 H14 109.729 C5 C3 H7 110.882
C5 C3 H9 116.624 C5 C6 H12 113.139
C5 C6 H14 109.500 C6 C4 H8 110.882
C6 C4 H10 116.624 C6 C5 H11 113.139
C6 C5 H13 109.500 H7 C3 H9 106.539
H8 C4 H10 106.539 H11 C5 H13 107.099
H12 C6 H14 107.099
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.394      
2 C 0.362      
3 C -0.324      
4 C -0.324      
5 C -0.277      
6 C -0.277      
7 H 0.171      
8 H 0.171      
9 H 0.165      
10 H 0.165      
11 H 0.138      
12 H 0.138      
13 H 0.143      
14 H 0.143      


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 -2.877 2.877
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -34.720 -0.277 0.000
y -0.277 -34.320 0.000
z 0.000 0.000 -43.533
Traceless
 xyz
x 4.207 -0.277 0.000
y -0.277 4.806 0.000
z 0.000 0.000 -9.013
Polar
3z2-r2-18.025
x2-y2-0.400
xy-0.277
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.626 0.032 0.000
y 0.032 8.111 0.000
z 0.000 0.000 8.726


<r2> (average value of r2) Å2
<r2> 151.051
(<r2>)1/2 12.290