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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: CCD/6-311G*

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/6-311G*
 hartrees
Energy at 0K-153.431256
Energy at 298.15K 
HF Energy-152.950243
Nuclear repulsion energy69.647422
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/6-311G*
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' 3168 3025 10.62      
2 A' 3049 2913 3.59      
3 A' 2946 2814 116.14      
4 A' 1870 1786 132.90      
5 A' 1501 1433 20.85      
6 A' 1459 1394 16.66      
7 A' 1420 1356 19.49      
8 A' 1156 1104 23.01      
9 A' 915 874 4.76      
10 A' 519 495 14.37      
11 A" 3120 2980 11.16      
12 A" 1502 1435 12.54      
13 A" 1158 1106 0.17      
14 A" 792 756 1.03      
15 A" 154 147 0.89      

Unscaled Zero Point Vibrational Energy (zpe) 12363.6 cm-1
Scaled (by 0.9551) Zero Point Vibrational Energy (zpe) 11808.5 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/6-311G*
ABC
1.89538 0.33806 0.30309

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.466 0.000
C2 -0.933 -0.721 0.000
O3 1.202 0.386 0.000
H4 -0.492 1.462 0.000
H5 -0.357 -1.649 0.000
H6 -1.583 -0.686 0.883
H7 -1.583 -0.686 -0.883

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.50951.20411.11162.14482.14732.1473
C21.50952.40462.22771.09231.09701.0970
O31.20412.40462.00642.56373.11173.1117
H41.11162.22772.00643.11472.56602.5660
H52.14481.09232.56373.11471.79211.7921
H62.14731.09703.11172.56601.79211.7654
H72.14731.09703.11172.56601.79211.7654

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.010 C1 C2 H6 109.931
C1 C2 H7 109.931 C2 C1 O3 124.395
C2 C1 H4 115.571 O3 C1 H4 120.034
H5 C2 H6 109.885 H5 C2 H7 109.885
H6 C2 H7 107.155
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability