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: CCD/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at CCD/6-311G**
 hartrees
Energy at 0K-269.889134
Energy at 298.15K-269.898844
HF Energy-268.930168
Nuclear repulsion energy235.268488
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/6-311G**
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 3149 3008 5.61      
2 A 3135 2994 20.27      
3 A 3072 2934 20.86      
4 A 3071 2933 3.79      
5 A 1892 1807 190.71      
6 A 1535 1466 1.04      
7 A 1483 1416 0.08      
8 A 1379 1317 0.15      
9 A 1339 1279 0.99      
10 A 1250 1193 0.00      
11 A 1205 1151 0.52      
12 A 1060 1012 0.62      
13 A 983 939 0.08      
14 A 923 882 0.33      
15 A 837 799 0.81      
16 A 729 696 0.77      
17 A 568 543 3.88      
18 A 248 237 0.09      
19 B 3151 3009 31.01      
20 B 3139 2998 29.77      
21 B 3076 2938 37.24      
22 B 3071 2933 10.70      
23 B 1520 1452 4.48      
24 B 1483 1417 16.60      
25 B 1373 1311 1.63      
26 B 1333 1273 11.87      
27 B 1279 1222 3.32      
28 B 1196 1142 52.64      
29 B 1185 1132 7.40      
30 B 990 945 10.57      
31 B 940 898 0.41      
32 B 866 827 7.13      
33 B 587 561 1.91      
34 B 479 458 6.76      
35 B 456 436 3.84      
36 B 97 93 4.15      

Unscaled Zero Point Vibrational Energy (zpe) 27037.8 cm-1
Scaled (by 0.9551) Zero Point Vibrational Energy (zpe) 25823.8 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/6-311G**
ABC
0.22029 0.11176 0.08031

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/6-311G**

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 2.128
C2 0.000 0.000 0.926
C3 0.000 1.244 0.029
C4 0.000 -1.244 0.029
C5 0.316 0.705 -1.375
C6 -0.316 -0.705 -1.375
H7 -1.011 1.673 0.065
H8 1.011 -1.673 0.065
H9 0.697 1.995 0.410
H10 -0.697 -1.995 0.410
H11 -0.066 1.341 -2.178
H12 0.066 -1.341 -2.178
H13 1.403 0.617 -1.504
H14 -1.403 -0.617 -1.504

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
O11.20212.43992.43993.58733.58732.84202.84202.72372.72374.51074.51073.94213.9421
C21.20211.53351.53352.42722.42722.13592.13592.17552.17553.38213.38212.87282.8728
C32.43991.53352.48771.53692.42241.09863.08731.09333.33512.21023.39992.17022.7895
C42.43991.53352.48772.42241.53693.08731.09863.33511.09333.39992.21022.78952.1702
C53.58732.42721.53692.42241.54472.18452.86542.23543.39151.09372.21221.09762.1723
C63.58732.42722.42241.53691.54472.86542.18453.39152.23542.21221.09372.17231.0976
H72.84202.13591.09863.08732.18452.86543.90941.77133.69802.45633.90883.06592.8039
H82.84202.13593.08731.09862.86542.18453.90943.69801.77133.90882.45632.80393.0659
H92.72372.17551.09333.33512.23543.39151.77133.69804.22692.77624.26962.46173.8596
H102.72372.17553.33511.09333.39152.23543.69801.77134.22694.26962.77623.85962.4617
H114.51073.38212.21023.39991.09372.21222.45633.90882.77624.26962.68611.77092.4653
H124.51073.38213.39992.21022.21221.09373.90882.45634.26962.77622.68612.46531.7709
H133.94212.87282.17022.78951.09762.17233.06592.80392.46173.85961.77092.46533.0651
H143.94212.87282.78952.17022.17231.09762.80393.06593.85962.46172.46531.77093.0651

picture of Cyclopentanone state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 125.796 O1 C2 C4 125.796
C2 C3 C5 104.467 C2 C3 H7 107.326
C2 C3 H9 110.714 C2 C4 C6 104.467
C2 C4 H8 107.326 C2 C4 H10 110.714
C3 C2 C4 108.408 C3 C5 C6 103.644
C3 C5 H11 113.239 C3 C5 H13 109.797
C4 C6 C5 103.644 C4 C6 H12 113.239
C4 C6 H14 109.797 C5 C3 H7 110.871
C5 C3 H9 115.368 C5 C6 H12 112.837
C5 C6 H14 109.427 C6 C4 H8 110.871
C6 C4 H10 115.368 C6 C5 H11 112.837
C6 C5 H13 109.427 H7 C3 H9 107.826
H8 C4 H10 107.826 H11 C5 H13 107.827
H12 C6 H14 107.827
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability