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

using model chemistry: QCISD/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 QCISD/3-21G
 hartrees
Energy at 0K-230.231977
Energy at 298.15K-230.240524
HF Energy-229.692919
Nuclear repulsion energy173.086554
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 QCISD/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' 3097 3002 29.84      
2 A' 3095 2999 44.39      
3 A' 3067 2973 1.14      
4 A' 3022 2929 14.07      
5 A' 2866 2778 98.23      
6 A' 1689 1637 77.74      
7 A' 1584 1535 17.04      
8 A' 1580 1532 4.89      
9 A' 1482 1437 3.86      
10 A' 1450 1405 1.73      
11 A' 1346 1304 0.96      
12 A' 1222 1185 1.09      
13 A' 1193 1157 4.26      
14 A' 910 882 19.71      
15 A' 840 814 21.48      
16 A' 534 517 4.36      
17 A' 347 336 5.45      
18 A' 342 331 1.09      
19 A' 242 235 0.76      
20 A" 3095 3000 12.33      
21 A" 3083 2988 6.55      
22 A" 3020 2927 18.08      
23 A" 1570 1522 2.83      
24 A" 1566 1518 0.20      
25 A" 1464 1419 5.63      
26 A" 1386 1343 0.67      
27 A" 1147 1112 1.67      
28 A" 998 967 0.04      
29 A" 986 956 1.06      
30 A" 957 928 1.38      
31 A" 342 332 0.54      
32 A" 231 224 0.06      
33 A" 78 76 4.31      

Unscaled Zero Point Vibrational Energy (zpe) 24915.6 cm-1
Scaled (by 0.9692) Zero Point Vibrational Energy (zpe) 24148.2 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 QCISD/3-21G
ABC
0.25245 0.11978 0.09093

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 -0.247 0.603 2.187
H2 -0.247 0.603 -2.187
H3 -1.709 0.071 -1.305
H4 -1.709 0.071 1.305
H5 -1.227 1.790 1.280
H6 -1.227 1.790 -1.280
C7 -0.848 0.758 -1.280
C8 -0.848 0.758 1.280
H9 0.896 1.135 0.000
C10 0.000 0.500 0.000
C11 0.470 -0.956 0.000
H12 -0.381 -1.675 0.000
O13 1.651 -1.343 0.000

Atom - Atom Distances (Å)
  H1 H2 H3 H4 H5 H6 C7 C8 H9 C10 C11 H12 O13
H14.37503.82301.78821.78673.79403.52281.09932.52512.20382.78013.16053.4892
H24.37501.78823.82303.79401.78671.09933.52282.52512.20382.78013.16053.4892
H33.82301.78822.60973.14121.78481.10112.80973.10182.19232.73952.55253.8721
H41.78823.82302.60971.78483.14122.80971.10113.10182.19232.73952.55253.8721
H51.78673.79403.14121.78482.56042.78641.09912.56432.19253.47253.78904.4426
H63.79401.78671.78483.14122.56041.09912.78642.56432.19253.47253.78904.4426
C73.52281.09931.10112.80972.78641.09912.56042.19661.55722.51282.78833.5072
C81.09933.52282.80971.10111.09912.78642.56042.19661.55722.51282.78833.5072
H92.52512.52513.10183.10182.56432.56432.19662.19661.09852.13463.08632.5907
C102.20382.20382.19232.19232.19252.19251.55721.55721.09851.53042.20792.4747
C112.78012.78012.73952.73953.47253.47252.51282.51282.13461.53041.11311.2432
H123.16053.16052.55252.55253.78903.78902.78832.78833.08632.20791.11312.0586
O133.48923.48923.87213.87214.44264.44263.50723.50722.59072.47471.24322.0586

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 108.713 H1 C8 H5 108.722
H1 C8 C10 110.933 H2 C7 H3 108.713
H2 C7 H6 108.722 H2 C7 C10 110.933
H3 C7 H6 108.424 H3 C7 C10 109.934
H4 C8 H5 108.424 H4 C8 C10 109.934
H5 C8 C10 110.059 H6 C7 C10 110.059
C7 C10 C8 110.600 C7 C10 H9 110.417
C7 C10 C11 108.946 C8 C10 H9 110.417
C8 C10 C11 108.946 H9 C10 C11 107.436
C10 C11 H12 112.315 C10 C11 O13 126.002
H12 C11 O13 121.683
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability