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All results from a given calculation for C5H10O (2-Pentanone)

using model chemistry: G4

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at G4
 hartrees
Energy at 0K-271.589576
Energy at 298.15K-271.581457
HF Energy-271.806409
Nuclear repulsion energy235.398707
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 B3LYP/6-31G(2df,p)
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' 3151 3040 10.75      
2 A' 3103 2994 36.00      
3 A' 3050 2943 19.04      
4 A' 3036 2930 5.64      
5 A' 3027 2921 26.25      
6 A' 3004 2899 13.24      
7 A' 1812 1748 133.29      
8 A' 1508 1455 3.69      
9 A' 1486 1434 2.60      
10 A' 1465 1414 14.49      
11 A' 1449 1398 2.50      
12 A' 1411 1361 0.81      
13 A' 1394 1345 35.45      
14 A' 1381 1332 21.15      
15 A' 1321 1274 12.02      
16 A' 1181 1140 72.50      
17 A' 1128 1088 0.03      
18 A' 1052 1015 0.17      
19 A' 958 924 5.81      
20 A' 903 872 10.54      
21 A' 819 791 1.20      
22 A' 591 570 12.02      
23 A' 389 375 1.15      
24 A' 337 326 2.70      
25 A' 170 164 4.43      
26 A" 3100 2991 63.00      
27 A" 3096 2987 3.87      
28 A" 3075 2967 0.12      
29 A" 3029 2923 8.01      
30 A" 1500 1447 4.75      
31 A" 1477 1425 8.47      
32 A" 1321 1275 0.09      
33 A" 1250 1206 0.00      
34 A" 1142 1102 1.10      
35 A" 974 940 1.01      
36 A" 830 801 0.43      
37 A" 723 697 3.46      
38 A" 477 461 0.10      
39 A" 245 236 0.04      
40 A" 101 97 0.00      
41 A" 82 79 0.57      
42 A" 22i 21i 0.53      

Unscaled Zero Point Vibrational Energy (zpe) 30759.5 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 29682.9 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 B3LYP/6-31G(2df,p)
ABC
0.27884 0.05943 0.05082

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.434 1.330 0.000
C2 -1.465 0.146 0.000
C3 0.000 0.582 0.000
C4 0.993 -0.574 0.000
C5 2.465 -0.195 0.000
O6 0.633 -1.729 0.000
H7 -3.474 0.990 0.000
H8 -2.293 1.963 0.883
H9 -2.293 1.963 -0.883
H10 -1.646 -0.491 0.872
H11 -1.646 -0.491 -0.872
H12 0.221 1.217 -0.870
H13 0.221 1.217 0.870
H14 3.080 -1.096 0.000
H15 2.703 0.414 -0.879
H16 2.703 0.414 0.879

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 O6 H7 H8 H9 H10 H11 H12 H13 H14 H15 H16
C11.53052.54673.92105.13134.33251.09431.09601.09602.16812.16812.79682.79686.02465.29255.2925
C21.53051.52832.56133.94462.81392.17942.18352.18351.09521.09522.17892.17894.71164.26844.2684
C32.54671.52831.52412.58462.39643.49812.81852.81852.14972.14971.10011.10013.50752.84792.8479
C43.92102.56131.52411.51981.20994.73324.24434.24432.78052.78052.13602.13602.15132.16202.1620
C55.13133.94462.58461.51982.38926.05635.29845.29844.21274.21272.79062.79061.09071.09591.0959
O64.33252.81392.39641.20992.38924.92594.79324.79322.73622.73623.09983.09982.52763.10653.1065
H71.09432.17943.49814.73326.05634.92591.76771.76772.50942.50943.80343.80346.87826.26666.2666
H81.09602.18352.81854.24435.29844.79321.76771.76702.53833.08623.15462.62216.24535.51995.2308
H91.09602.18352.81854.24435.29844.79321.76771.76703.08622.53832.62213.15466.24535.23085.5199
H102.16811.09522.14972.78054.21272.73622.50942.53833.08621.74403.07262.53084.84364.77524.4424
H112.16811.09522.14972.78054.21272.73622.50943.08622.53831.74402.53083.07264.84364.44244.7752
H122.79682.17891.10012.13602.79063.09983.80343.15462.62213.07262.53081.74103.77912.60923.1417
H132.79682.17891.10012.13602.79063.09983.80342.62213.15462.53083.07261.74103.77913.14172.6092
H146.02464.71163.50752.15131.09072.52766.87826.24536.24534.84364.84363.77913.77911.78701.7870
H155.29254.26842.84792.16201.09593.10656.26665.51995.23084.77524.44242.60923.14171.78701.7590
H165.29254.26842.84792.16201.09593.10656.26665.23085.51994.44244.77523.14172.60921.78701.7590

picture of 2-Pentanone state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 112.613 C1 C2 H10 110.129
C1 C2 H11 110.129 C2 C1 H7 111.137
C2 C1 H8 111.362 C2 C1 H9 111.362
C2 C3 C4 114.034 C2 C3 H12 110.805
C2 C3 H13 110.805 C3 C2 H10 108.990
C3 C2 H11 108.990 C3 C4 C5 115.955
C3 C4 O6 122.172 C4 C3 H12 107.946
C4 C3 H13 107.946 C4 C5 H14 109.723
C4 C5 H15 110.523 C4 C5 H16 110.523
C5 C4 O6 121.872 H7 C1 H8 107.639
H7 C1 H9 107.639 H8 C1 H9 107.512
H10 C2 H11 105.750 H12 C3 H13 104.840
H14 C5 H15 109.592 H14 C5 H16 109.592
H15 C5 H16 106.840
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability