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

using model chemistry: MP2/CEP-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/CEP-31G*
 hartrees
Energy at 0K-42.955443
Energy at 298.15K-42.963883
HF Energy-42.294602
Nuclear repulsion energy97.523912
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/CEP-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' 3184 3023 32.13      
2 A' 3179 3018 72.94      
3 A' 3147 2987 3.65      
4 A' 3077 2922 21.01      
5 A' 2965 2815 113.81      
6 A' 1761 1672 143.53      
7 A' 1536 1458 21.07      
8 A' 1532 1455 6.40      
9 A' 1450 1377 4.34      
10 A' 1424 1352 1.39      
11 A' 1335 1267 1.27      
12 A' 1216 1154 2.10      
13 A' 1200 1140 5.36      
14 A' 961 912 18.00      
15 A' 863 819 19.03      
16 A' 541 514 5.62      
17 A' 349 331 7.41      
18 A' 331 314 0.28      
19 A' 239 227 0.94      
20 A" 3182 3021 15.89      
21 A" 3174 3014 3.46      
22 A" 3077 2921 30.81      
23 A" 1520 1443 2.68      
24 A" 1513 1437 0.78      
25 A" 1434 1361 4.97      
26 A" 1368 1299 0.42      
27 A" 1167 1108 2.41      
28 A" 1008 957 1.60      
29 A" 963 914 0.05      
30 A" 947 899 2.41      
31 A" 329 312 1.04      
32 A" 216 205 0.01      
33 A" 62 59 6.83      

Unscaled Zero Point Vibrational Energy (zpe) 25124.2 cm-1
Scaled (by 0.9494) Zero Point Vibrational Energy (zpe) 23852.9 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 MP2/CEP-31G*
ABC
0.25293 0.12111 0.09186

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 -0.240 0.584 2.189
H2 -0.240 0.584 -2.189
H3 -1.725 0.104 -1.307
H4 -1.725 0.104 1.307
H5 -1.185 1.808 1.287
H6 -1.185 1.808 -1.287
C7 -0.835 0.760 -1.276
C8 -0.835 0.760 1.276
H9 0.910 1.118 0.000
C10 0.000 0.494 0.000
C11 0.454 -0.961 0.000
H12 -0.377 -1.713 0.000
O13 1.633 -1.339 0.000

Atom - Atom Distances (Å)
  H1 H2 H3 H4 H5 H6 C7 C8 H9 C10 C11 H12 O13
H14.37743.82811.79291.79023.80433.51961.10442.52952.20362.76743.17593.4637
H24.37741.79293.82813.80431.79021.10443.51962.52952.20362.76743.17593.4637
H33.82811.79292.61343.15011.78771.10592.80903.11142.19892.75502.61253.8818
H41.79293.82812.61341.78773.15012.80901.10593.11142.19892.75502.61253.8818
H51.79023.80433.15011.78772.57422.79061.10452.55392.18813.46563.83514.4164
H63.80431.79021.78773.15012.57421.10452.79062.55392.18813.46563.83514.4164
C73.51961.10441.10592.80902.79061.10452.55122.19151.54802.50062.82053.4828
C81.10443.51962.80901.10591.10452.79062.55122.19151.54802.50062.82053.4828
H92.52952.52953.11143.11142.55392.55392.19152.19151.10382.12863.11062.5617
C102.20362.20362.19892.19892.18812.18811.54801.54801.10381.52402.23922.4552
C112.76742.76742.75502.75503.46563.46562.50062.50062.12861.52401.12161.2383
H123.17593.17592.61252.61253.83513.83512.82052.82053.11062.23921.12162.0453
O133.46373.46373.88183.88184.41644.41643.48283.48282.56172.45521.23832.0453

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 108.413 H1 C8 H5 108.280
H1 C8 C10 111.262 H2 C7 H3 108.413
H2 C7 H6 108.280 H2 C7 C10 111.262
H3 C7 H6 107.946 H3 C7 C10 110.800
H4 C8 H5 107.946 H4 C8 C10 110.800
H5 C8 C10 110.038 H6 C7 C10 110.038
C7 C10 C8 110.987 C7 C10 H9 110.347
C7 C10 C11 108.974 C8 C10 H9 110.347
C8 C10 C11 108.974 H9 C10 C11 107.112
C10 C11 H12 114.793 C10 C11 O13 125.132
H12 C11 O13 120.076
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability