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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-153.168474
Energy at 298.15K 
HF Energy-152.840089
Nuclear repulsion energy68.534175
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' 3133 3007 14.18      
2 A' 3023 2900 5.25      
3 A' 2986 2865 91.39      
4 A' 1734 1664 63.99      
5 A' 1530 1468 17.25      
6 A' 1461 1402 16.55      
7 A' 1457 1398 9.73      
8 A' 1165 1118 23.75      
9 A' 927 889 5.57      
10 A' 516 495 14.62      
11 A" 3089 2964 14.03      
12 A" 1530 1468 11.81      
13 A" 1166 1118 0.05      
14 A" 811 778 1.75      
15 A" 147 141 1.02      

Unscaled Zero Point Vibrational Energy (zpe) 12336.1 cm-1
Scaled (by 0.9595) Zero Point Vibrational Energy (zpe) 11836.5 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/6-31G
ABC
1.83869 0.32844 0.29421

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 0.473 0.000
C2 -0.970 -0.694 0.000
O3 1.240 0.348 0.000
H4 -0.452 1.484 0.000
H5 -0.409 -1.639 0.000
H6 -1.620 -0.650 0.890
H7 -1.620 -0.650 -0.890

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.51741.24631.10742.15182.16332.1633
C21.51742.44292.23901.09921.10341.1034
O31.24632.44292.03812.58223.15723.1572
H41.10742.23902.03813.12402.59132.5913
H52.15181.09922.58223.12401.79921.7992
H62.16331.10343.15722.59131.79921.7810
H72.16331.10343.15722.59131.79921.7810

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 109.608 C1 C2 H6 110.260
C1 C2 H7 110.260 C2 C1 O3 123.943
C2 C1 H4 116.204 O3 C1 H4 119.853
H5 C2 H6 109.536 H5 C2 H7 109.536
H6 C2 H7 107.611
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability