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 C5H10O (3-Pentanone)

using model chemistry: G3MP2

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at G3MP2
 hartrees
Energy at 0K-271.314272
Energy at 298.15K-271.305326
HF Energy-270.033649
Nuclear repulsion energy239.971478
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 HF/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 A1 3283 3093 54.82      
2 A1 3221 3034 0.02      
3 A1 3200 3015 37.56      
4 A1 2011 1894 169.31      
5 A1 1643 1548 7.55      
6 A1 1616 1523 8.46      
7 A1 1570 1479 8.37      
8 A1 1507 1420 2.40      
9 A1 1215 1145 3.57      
10 A1 1091 1028 2.27      
11 A1 848 799 0.09      
12 A1 434 408 0.58      
13 A1 209 197 0.58      
14 A2 3299 3108 0.00      
15 A2 3215 3029 0.00      
16 A2 1639 1545 0.00      
17 A2 1386 1305 0.00      
18 A2 1101 1037 0.00      
19 A2 778 733 0.00      
20 A2 243 229 0.00      
21 A2 27 26 0.00      
22 B1 3299 3109 71.70      
23 B1 3228 3041 33.45      
24 B1 1640 1545 8.76      
25 B1 1434 1351 1.32      
26 B1 1258 1185 0.03      
27 B1 893 842 8.82      
28 B1 507 477 0.83      
29 B1 225 212 0.33      
30 B1 66 62 0.32      
31 B2 3283 3093 17.64      
32 B2 3220 3033 63.42      
33 B2 3189 3004 12.99      
34 B2 1644 1549 8.48      
35 B2 1605 1512 1.87      
36 B2 1571 1480 3.10      
37 B2 1543 1454 23.15      
38 B2 1242 1170 72.14      
39 B2 1113 1049 8.43      
40 B2 1027 967 13.65      
41 B2 677 638 12.04      
42 B2 335 316 14.69      

Unscaled Zero Point Vibrational Energy (zpe) 33263.9 cm-1
Scaled (by 0.9422) Zero Point Vibrational Energy (zpe) 31341.2 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 MP2=FULL/6-31G*
ABC
0.29613 0.06569 0.05597

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.284
C2 0.000 0.000 0.056
C3 0.000 1.292 -0.739
C4 0.000 -1.292 -0.739
C5 0.000 2.532 0.140
C6 0.000 -2.532 0.140
H7 0.873 1.279 -1.405
H8 -0.873 1.279 -1.405
H9 -0.873 -1.279 -1.405
H10 0.873 -1.279 -1.405
H11 0.000 3.438 -0.471
H12 -0.880 2.547 0.786
H13 0.880 2.547 0.786
H14 0.000 -3.438 -0.471
H15 0.880 -2.547 0.786
H16 -0.880 -2.547 0.786

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14 H15 H16
O11.22792.39992.39992.77792.77793.10263.10263.10263.10263.85942.74022.74023.85942.74022.7402
C21.22791.51661.51662.53312.53312.12862.12862.12862.12863.47772.79192.79193.47772.79192.7919
C32.39991.51662.58341.52023.92331.09791.09792.79532.79532.16272.16232.16234.73704.22324.2232
C42.39991.51662.58343.92331.52022.79532.79531.09791.09794.73704.22324.22322.16272.16232.1623
C52.77792.53311.52023.92335.06352.17252.17254.20374.20371.09281.09141.09146.00065.19465.1946
C62.77792.53313.92331.52025.06354.20374.20372.17252.17256.00065.19465.19461.09281.09141.0914
H73.10262.12861.09792.79532.17254.20371.74563.09682.55792.50893.07902.53154.88694.40894.7445
H83.10262.12861.09792.79532.17254.20371.74562.55793.09682.50892.53153.07904.88694.74454.4089
H93.10262.12862.79531.09794.20372.17253.09682.55791.74564.88694.40894.74452.50893.07902.5315
H103.10262.12862.79531.09794.20372.17252.55793.09681.74564.88694.74454.40892.50892.53153.0790
H113.85943.47772.16274.73701.09286.00062.50892.50894.88694.88691.77391.77396.87546.17816.1781
H122.74022.79192.16234.22321.09145.19463.07902.53154.40894.74451.77391.75966.17815.38935.0939
H132.74022.79192.16234.22321.09145.19462.53153.07904.74454.40891.77391.75966.17815.09395.3893
H143.85943.47774.73702.16276.00061.09284.88694.88692.50892.50896.87546.17816.17811.77391.7739
H152.74022.79194.22322.16235.19461.09144.40894.74453.07902.53156.17815.38935.09391.77391.7596
H162.74022.79194.22322.16235.19461.09144.74454.40892.53153.07906.17815.09395.38931.77391.7596

picture of 3-Pentanone state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 121.857 O1 C2 C4 121.857
C2 C3 C5 113.588 C2 C3 H7 107.936
C2 C3 H8 107.936 C2 C4 C6 113.588
C2 C4 H9 107.936 C2 C4 H10 107.936
C3 C2 C4 116.287 C3 C5 H11 110.356
C3 C5 H12 111.013 C3 C5 H13 111.013
C4 C6 H14 110.356 C4 C6 H15 111.013
C4 C6 H16 111.013 C5 C3 H7 110.756
C5 C3 H8 110.756 C6 C4 H9 110.756
C6 C4 H10 110.756 H7 C3 H8 105.492
H9 C4 H10 105.492 H11 C5 H12 108.396
H11 C5 H13 108.396 H12 C5 H13 107.560
H14 C6 H15 108.396 H14 C6 H16 108.396
H15 C6 H16 107.560
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability