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

using model chemistry: MP2/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/3-21G*
 hartrees
Energy at 0K-230.187084
Energy at 298.15K-230.195681
HF Energy-229.693056
Nuclear repulsion energy173.417405
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 MP2/3-21G*
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' 3161 3007 23.28      
2 A' 3157 3003 42.60      
3 A' 3123 2971 1.34      
4 A' 3078 2928 12.45      
5 A' 2907 2766 109.36      
6 A' 1646 1566 61.92      
7 A' 1608 1530 18.11      
8 A' 1604 1526 3.41      
9 A' 1498 1425 3.77      
10 A' 1464 1393 0.74      
11 A' 1360 1293 0.64      
12 A' 1237 1177 0.77      
13 A' 1207 1148 4.46      
14 A' 924 879 23.30      
15 A' 852 811 22.21      
16 A' 540 514 3.83      
17 A' 350 333 4.53      
18 A' 345 329 1.46      
19 A' 247 235 0.75      
20 A" 3159 3006 11.94      
21 A" 3149 2995 4.56      
22 A" 3077 2927 16.54      
23 A" 1594 1516 2.88      
24 A" 1590 1513 0.29      
25 A" 1481 1409 5.64      
26 A" 1404 1335 0.81      
27 A" 1163 1106 1.82      
28 A" 1013 964 0.02      
29 A" 1001 952 0.87      
30 A" 973 925 1.99      
31 A" 347 330 0.49      
32 A" 237 226 0.06      
33 A" 82 78 3.51      

Unscaled Zero Point Vibrational Energy (zpe) 25288.6 cm-1
Scaled (by 0.9513) Zero Point Vibrational Energy (zpe) 24057.0 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 MP2/3-21G*
ABC
0.25415 0.12005 0.09123

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 -0.246 0.605 2.180
H2 -0.246 0.605 -2.180
H3 -1.703 0.076 -1.302
H4 -1.703 0.076 1.302
H5 -1.220 1.788 1.274
H6 -1.220 1.788 -1.274
C7 -0.845 0.759 -1.276
C8 -0.845 0.759 1.276
H9 0.896 1.129 0.000
C10 0.000 0.499 0.000
C11 0.463 -0.953 0.000
H12 -0.389 -1.664 0.000
O13 1.648 -1.349 0.000

Atom - Atom Distances (Å)
  H1 H2 H3 H4 H5 H6 C7 C8 H9 C10 C11 H12 O13
H14.35993.81131.78181.78043.77833.51101.09532.51572.19632.77163.15003.4866
H24.35991.78183.81133.77831.78041.09533.51102.51572.19632.77163.15003.4866
H33.81131.78182.60363.12971.77861.09692.80143.09122.18472.72872.53973.8670
H41.78183.81132.60361.77863.12972.80141.09693.09122.18472.72872.53973.8670
H51.78043.77833.12971.77862.54722.77501.09522.55632.18463.45933.77214.4370
H63.77831.78041.77863.12972.54721.09522.77502.55632.18463.45933.77214.4370
C73.51101.09531.09692.80142.77501.09522.55222.18971.55232.50392.77623.5050
C81.09533.51102.80141.09691.09522.77502.55222.18971.55232.50392.77623.5050
H92.51572.51573.09123.09122.55632.55632.18972.18971.09512.12573.07392.5890
C102.19632.19632.18472.18472.18462.18461.55231.55231.09511.52372.19752.4759
C112.77162.77162.72872.72873.45933.45932.50392.50392.12571.52371.11001.2492
H123.15003.15002.53972.53973.77213.77212.77622.77623.07392.19751.11002.0611
O133.48663.48663.86703.86704.43704.43703.50503.50502.58902.47591.24922.0611

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 108.742 H1 C8 H5 108.738
H1 C8 C10 110.924 H2 C7 H3 108.742
H2 C7 H6 108.738 H2 C7 C10 110.924
H3 C7 H6 108.463 H3 C7 C10 109.916
H4 C8 H5 108.463 H4 C8 C10 109.916
H5 C8 C10 110.004 H6 C7 C10 110.004
C7 C10 C8 110.582 C7 C10 H9 110.418
C7 C10 C11 108.973 C8 C10 H9 110.418
C8 C10 C11 108.973 H9 C10 C11 107.397
C10 C11 H12 112.151 C10 C11 O13 126.188
H12 C11 O13 121.661
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability