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All results from a given calculation for CHOCH(CH3)CH3 (Propanal, 2-methyl-)

using model chemistry: MP2/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/6-31G*
 hartrees
Energy at 0K-231.680064
Energy at 298.15K-231.688593
HF Energy-230.982851
Nuclear repulsion energy175.299082
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 MP2/6-31G*
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' 3199 3016 20.37      
2 A' 3190 3008 38.73      
3 A' 3134 2956 5.77      
4 A' 3100 2924 13.01      
5 A' 2948 2780 101.94      
6 A' 1786 1684 109.80      
7 A' 1573 1483 17.31      
8 A' 1567 1478 6.91      
9 A' 1476 1392 3.58      
10 A' 1450 1368 2.01      
11 A' 1357 1280 0.56      
12 A' 1226 1157 0.09      
13 A' 1216 1146 8.39      
14 A' 965 910 17.55      
15 A' 875 825 19.87      
16 A' 554 523 5.79      
17 A' 361 341 6.97      
18 A' 339 320 0.25      
19 A' 245 231 0.87      
20 A" 3198 3016 11.57      
21 A" 3186 3005 2.84      
22 A" 3099 2923 17.89      
23 A" 1555 1466 2.70      
24 A" 1551 1462 0.55      
25 A" 1454 1371 4.69      
26 A" 1392 1313 0.58      
27 A" 1176 1109 0.53      
28 A" 1021 963 0.55      
29 A" 978 922 0.55      
30 A" 959 904 1.30      
31 A" 338 319 0.66      
32 A" 225 212 0.04      
33 A" 60 57 5.27      

Unscaled Zero Point Vibrational Energy (zpe) 25376.4 cm-1
Scaled (by 0.943) Zero Point Vibrational Energy (zpe) 23930.0 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 MP2/6-31G*
ABC
0.25755 0.12374 0.09371

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.304 0.558 2.165
H2 0.304 0.558 -2.165
H3 -1.029 1.353 -1.306
H4 -1.029 1.353 1.306
H5 0.593 2.060 1.268
H6 0.593 2.060 -1.268
C7 0.039 1.116 -1.263
C8 0.039 1.116 1.263
H9 1.424 0.031 0.000
C10 0.367 0.318 0.000
C11 -0.434 -0.962 0.000
H12 -1.539 -0.806 0.000
O13 0.039 -2.087 0.000

Atom - Atom Distances (Å)
  H1 H2 H3 H4 H5 H6 C7 C8 H9 C10 C11 H12 O13
H14.32933.80221.77441.77313.75763.48261.09372.49322.17882.74583.15303.4280
H24.32931.77443.80223.75761.77311.09373.48262.49322.17882.74583.15303.4280
H33.80221.77442.61213.12331.77001.09532.79213.07752.17412.72362.57423.8319
H41.77443.80222.61211.77003.12332.79211.09533.07752.17412.72362.57423.8319
H51.77313.75763.12331.77002.53532.75651.09372.53232.16623.43383.78984.3716
H63.75761.77311.77003.12332.53531.09372.75652.53232.16623.43383.78984.3716
C73.48261.09371.09532.79212.75651.09372.52532.16551.52962.47742.78923.4436
C81.09373.48262.79211.09531.09372.75652.52532.16551.52962.47742.78923.4436
H92.49322.49323.07753.07752.53232.53232.16552.16551.09522.10653.07822.5305
C102.17882.17882.17412.17412.16622.16621.52961.52961.09521.50942.21192.4271
C112.74582.74582.72362.72363.43383.43382.47742.47742.10651.50941.11511.2211
H123.15303.15302.57422.57423.78983.78982.78922.78923.07822.21191.11512.0324
O133.42803.42803.83193.83194.37164.37163.44363.44362.53052.42711.22112.0324

picture of Propanal, 2-methyl- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H1 C8 H4 108.310 H1 C8 H5 108.309
H1 C8 C10 111.224 H2 C7 H3 108.310
H2 C7 H6 108.309 H2 C7 C10 111.224
H3 C7 H6 107.913 H3 C7 C10 110.755
H4 C8 H5 107.913 H4 C8 C10 110.755
H5 C8 C10 110.225 H6 C7 C10 110.225
C7 C10 C8 111.273 C7 C10 H9 110.082
C7 C10 C11 109.210 C8 C10 H9 110.082
C8 C10 C11 109.210 H9 C10 C11 106.873
C10 C11 H12 114.028 C10 C11 O13 125.134
H12 C11 O13 120.838
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability