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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-42.621883
Energy at 298.15K-42.630242
HF Energy-42.181254
Nuclear repulsion energy95.896923
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' 3137 3031 58.30      
2 A' 3132 3026 122.17      
3 A' 3094 2990 5.25      
4 A' 3024 2922 32.61      
5 A' 2967 2867 120.99      
6 A' 1586 1532 77.67      
7 A' 1533 1481 10.60      
8 A' 1530 1479 12.07      
9 A' 1457 1408 3.10      
10 A' 1398 1351 1.25      
11 A' 1341 1296 3.59      
12 A' 1218 1177 1.31      
13 A' 1201 1161 4.00      
14 A' 943 911 17.40      
15 A' 843 815 17.59      
16 A' 524 507 5.55      
17 A' 339 328 9.03      
18 A' 326 315 0.45      
19 A' 223 216 0.90      
20 A" 3134 3028 24.85      
21 A" 3124 3019 9.18      
22 A" 3024 2922 43.80      
23 A" 1521 1470 3.85      
24 A" 1515 1464 0.07      
25 A" 1440 1392 5.73      
26 A" 1369 1323 1.00      
27 A" 1146 1108 4.99      
28 A" 994 960 0.58      
29 A" 955 923 0.76      
30 A" 935 903 2.66      
31 A" 316 306 1.37      
32 A" 198 191 0.01      
33 A" 70 67 8.67      

Unscaled Zero Point Vibrational Energy (zpe) 24779.9 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 23944.9 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
0.24503 0.11626 0.08829

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 -0.242 0.597 2.214
H2 -0.242 0.597 -2.214
H3 -1.758 0.170 -1.333
H4 -1.758 0.170 1.333
H5 -1.145 1.864 1.306
H6 -1.145 1.864 -1.306
C7 -0.838 0.796 -1.299
C8 -0.838 0.796 1.299
H9 0.931 1.098 0.000
C10 0.000 0.489 0.000
C11 0.434 -0.993 0.000
H12 -0.398 -1.745 0.000
O13 1.651 -1.393 0.000

Atom - Atom Distances (Å)
  H1 H2 H3 H4 H5 H6 C7 C8 H9 C10 C11 H12 O13
H14.42903.88141.80451.80153.84863.56881.11082.55542.23032.80863.22723.5281
H24.42901.80453.88143.84861.80151.11083.56882.55542.23032.80863.22723.5281
H33.88141.80452.66643.19471.80091.11282.85713.14112.22902.81692.70113.9799
H41.80453.88142.66641.80093.19472.85711.11283.14112.22902.81692.70113.9799
H51.80153.84863.19471.80092.61152.83131.11092.56932.21463.51533.90984.4864
H63.84861.80151.80093.19472.61151.11092.83132.56932.21463.51533.90984.4864
C73.56881.11081.11282.85712.83131.11092.59712.21511.57562.55032.88753.5599
C81.11083.56882.85711.11281.11092.83132.59712.21511.57562.55032.88753.5599
H92.55542.55543.14113.14112.56932.56932.21512.21511.11212.14863.13832.5928
C102.23032.23032.22902.22902.21462.21461.57561.57561.11211.54442.26992.5039
C112.80862.80862.81692.81693.51533.51532.55032.55032.14861.54441.12211.2808
H123.22723.22722.70112.70113.90983.90982.88752.88753.13832.26991.12212.0789
O133.52813.52813.97993.97994.48644.48643.55993.55992.59282.50391.28082.0789

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 108.492 H1 C8 H5 108.366
H1 C8 C10 111.060 H2 C7 H3 108.492
H2 C7 H6 108.366 H2 C7 C10 111.060
H3 C7 H6 108.159 H3 C7 C10 110.843
H4 C8 H5 108.159 H4 C8 C10 110.843
H5 C8 C10 109.835 H6 C7 C10 109.835
C7 C10 C8 111.011 C7 C10 H9 109.806
C7 C10 C11 109.650 C8 C10 H9 109.806
C8 C10 C11 109.650 H9 C10 C11 106.826
C10 C11 H12 115.789 C10 C11 O13 124.557
H12 C11 O13 119.655
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability