return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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-153.461915
Energy at 298.15K 
HF Energy-152.956720
Nuclear repulsion energy69.660769
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' 3182 3039 11.01      
2 A' 3063 2926 3.80      
3 A' 2954 2821 117.17      
4 A' 1872 1787 134.00      
5 A' 1492 1425 15.86      
6 A' 1462 1396 15.24      
7 A' 1409 1346 14.07      
8 A' 1151 1099 23.56      
9 A' 911 870 5.18      
10 A' 515 492 14.67      
11 A" 3135 2994 11.76      
12 A" 1499 1432 9.42      
13 A" 1154 1102 0.06      
14 A" 792 757 0.32      
15 A" 159 152 0.91      

Unscaled Zero Point Vibrational Energy (zpe) 12374.6 cm-1
Scaled (by 0.9551) Zero Point Vibrational Energy (zpe) 11819.0 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 CCD/6-311G**
ABC
1.89328 0.33818 0.30317

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 -0.932 -0.724 0.000
O3 1.201 0.388 0.000
H4 -0.501 1.458 0.000
H5 -0.355 -1.651 0.000
H6 -1.580 -0.684 0.884
H7 -1.580 -0.684 -0.884

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.51141.20311.11072.14672.14422.1442
C21.51142.40492.22371.09191.09651.0965
O31.20312.40492.00932.56473.10793.1079
H41.11072.22372.00933.11202.55532.5553
H52.14671.09192.56473.11201.79371.7937
H62.14421.09653.10792.55531.79371.7673
H72.14421.09653.10792.55531.79371.7673

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.049 C1 C2 H6 109.589
C1 C2 H7 109.589 C2 C1 O3 124.349
C2 C1 H4 115.152 O3 C1 H4 120.498
H5 C2 H6 110.090 H5 C2 H7 110.090
H6 C2 H7 107.390
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability