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 (2-Pentanone)

using model chemistry: MP2/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/cc-pVDZ
 hartrees
Energy at 0K-270.939960
Energy at 298.15K-270.950445
HF Energy-270.051349
Nuclear repulsion energy234.952777
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 MP2/cc-pVDZ
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' 3218 3066 7.12      
2 A' 3178 3027 27.60      
3 A' 3104 2956 15.08      
4 A' 3086 2939 5.81      
5 A' 3076 2930 27.67      
6 A' 3061 2915 12.47      
7 A' 1783 1698 85.85      
8 A' 1504 1432 4.02      
9 A' 1484 1413 2.56      
10 A' 1463 1393 15.51      
11 A' 1447 1378 2.01      
12 A' 1418 1351 21.21      
13 A' 1408 1341 39.12      
14 A' 1381 1316 19.52      
15 A' 1320 1257 12.21      
16 A' 1192 1136 49.13      
17 A' 1144 1089 0.44      
18 A' 1089 1037 0.35      
19 A' 966 920 2.87      
20 A' 929 885 7.71      
21 A' 840 800 1.01      
22 A' 598 570 12.60      
23 A' 394 375 0.96      
24 A' 344 327 2.81      
25 A' 176 167 3.95      
26 A" 3179 3028 11.74      
27 A" 3175 3024 41.71      
28 A" 3152 3003 1.02      
29 A" 3108 2961 7.47      
30 A" 1498 1427 6.10      
31 A" 1477 1407 10.74      
32 A" 1325 1262 0.15      
33 A" 1251 1192 0.00      
34 A" 1137 1083 0.54      
35 A" 973 927 0.63      
36 A" 834 795 0.54      
37 A" 730 695 2.82      
38 A" 476 453 0.01      
39 A" 260 247 0.05      
40 A" 116 111 0.00      
41 A" 100 96 0.53      
42 A" 21 20 0.33      

Unscaled Zero Point Vibrational Energy (zpe) 31205.7 cm-1
Scaled (by 0.9525) Zero Point Vibrational Energy (zpe) 29723.4 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 MP2/cc-pVDZ
ABC
0.27540 0.05971 0.05094

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.431 1.322 0.000
C2 -1.459 0.140 0.000
C3 0.000 0.590 0.000
C4 0.993 -0.567 0.000
C5 2.465 -0.189 0.000
O6 0.623 -1.734 0.000
H7 -3.478 0.979 0.000
H8 -2.284 1.957 0.891
H9 -2.284 1.957 -0.891
H10 -1.635 -0.502 0.880
H11 -1.635 -0.502 -0.880
H12 0.217 1.227 -0.880
H13 0.217 1.227 0.880
H14 3.084 -1.097 0.000
H15 2.699 0.423 -0.888
H16 2.699 0.423 0.888

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 O6 H7 H8 H9 H10 H11 H12 H13 H14 H15 H16
C11.52962.53843.91025.12324.32001.10231.10381.10382.17542.17542.79192.79196.02165.28315.2831
C21.52961.52672.55223.93782.80152.18662.18492.18491.10361.10362.18292.18294.70864.26154.2615
C32.53841.52671.52452.58492.40543.50012.80692.80692.15402.15401.10801.10803.51492.84652.8465
C43.91022.55221.52451.51971.22384.73134.23114.23112.77272.77272.14332.14332.15702.16322.1632
C55.12323.93782.58491.51972.40396.05695.28655.28654.20544.20542.79812.79811.09911.10321.1032
O64.32002.80152.40541.22382.40394.91784.78184.78182.71922.71923.11503.11502.54183.12243.1224
H71.10232.18663.50014.73136.05694.91781.78221.78222.52292.52293.80703.80706.88306.26596.2659
H81.10382.18492.80694.23115.28654.78181.78221.78152.54293.09873.15032.60556.23965.50895.2139
H91.10382.18492.80694.23115.28654.78181.78221.78153.09872.54292.60553.15036.23965.21395.5089
H102.17541.10362.15402.77274.20542.71922.52292.54293.09871.76023.08512.53374.83754.77184.4322
H112.17541.10362.15402.77274.20542.71922.52293.09872.54291.76022.53373.08514.83754.43224.7718
H122.79192.18291.10802.14332.79813.11503.80703.15032.60553.08512.53371.76023.79352.60893.1515
H132.79192.18291.10802.14332.79813.11503.80702.60553.15032.53373.08511.76023.79353.15152.6089
H146.02164.70863.51492.15701.09912.54186.88306.23966.23964.83754.83753.79353.79351.80151.8015
H155.28314.26152.84652.16321.10323.12246.26595.50895.21394.77184.43222.60893.15151.80151.7757
H165.28314.26152.84652.16321.10323.12246.26595.21395.50894.43224.77183.15152.60891.80151.7757

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 112.315 C1 C2 H10 110.364
C1 C2 H11 110.364 C2 C1 H7 111.331
C2 C1 H8 111.104 C2 C1 H9 111.104
C2 C3 C4 113.541 C2 C3 H12 110.894
C2 C3 H13 110.894 C3 C2 H10 108.894
C3 C2 H11 108.894 C3 C4 C5 116.231
C3 C4 O6 121.759 C4 C3 H12 107.967
C4 C3 H13 107.967 C4 C5 H14 109.863
C4 C5 H15 110.109 C4 C5 H16 110.109
C5 C4 O6 122.010 H7 C1 H8 107.766
H7 C1 H9 107.766 H8 C1 H9 107.598
H10 C2 H11 105.782 H12 C3 H13 105.176
H14 C5 H15 109.775 H14 C5 H16 109.775
H15 C5 H16 107.171
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability