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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: CCD/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 CCD/6-31G*
 hartrees
Energy at 0K-153.366772
Energy at 298.15K-153.370696
HF Energy-152.914253
Nuclear repulsion energy69.477806
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 CCD/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' 3200 3028 8.11      
2 A' 3079 2914 2.81      
3 A' 2982 2822 106.64      
4 A' 1873 1773 114.56      
5 A' 1520 1439 15.50      
6 A' 1473 1394 14.44      
7 A' 1439 1362 14.77      
8 A' 1166 1104 22.37      
9 A' 928 879 4.69      
10 A' 519 491 14.73      
11 A" 3150 2981 8.96      
12 A" 1524 1443 10.21      
13 A" 1171 1109 0.49      
14 A" 800 758 0.82      
15 A" 146 138 0.86      

Unscaled Zero Point Vibrational Energy (zpe) 12485.3 cm-1
Scaled (by 0.9465) Zero Point Vibrational Energy (zpe) 11817.3 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 CCD/6-31G*
ABC
1.88440 0.33718 0.30215

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.465 0.000
C2 -0.938 -0.718 0.000
O3 1.209 0.383 0.000
H4 -0.500 1.459 0.000
H5 -0.363 -1.648 0.000
H6 -1.588 -0.680 0.884
H7 -1.588 -0.680 -0.884

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.51021.21151.11252.14402.14862.1486
C21.51022.41292.22071.09331.09791.0979
O31.21152.41292.01962.56783.12013.1201
H41.11252.22072.01963.10982.55772.5577
H52.14401.09332.56783.10981.79411.7941
H62.14861.09793.12012.55771.79411.7680
H72.14861.09793.12012.55771.79411.7680

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 109.839 C1 C2 H6 109.930
C1 C2 H7 109.930 C2 C1 O3 124.510
C2 C1 H4 114.868 O3 C1 H4 120.623
H5 C2 H6 109.925 H5 C2 H7 109.925
H6 C2 H7 107.256
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability