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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: CCD/6-31+G**

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/6-31+G**
 hartrees
Energy at 0K-153.408666
Energy at 298.15K 
HF Energy-152.926280
Nuclear repulsion energy69.556635
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/6-31+G**
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' 3235 3048 9.28      
2 A' 3109 2929 4.29      
3 A' 3025 2851 98.16      
4 A' 1855 1748 148.19      
5 A' 1517 1430 17.91      
6 A' 1470 1386 14.00      
7 A' 1439 1356 10.81      
8 A' 1167 1099 22.18      
9 A' 926 872 5.02      
10 A' 518 489 14.88      
11 A" 3185 3001 9.81      
12 A" 1520 1432 10.29      
13 A" 1167 1099 0.01      
14 A" 799 753 0.54      
15 A" 141 133 1.80      

Unscaled Zero Point Vibrational Energy (zpe) 12536.0 cm-1
Scaled (by 0.9423) Zero Point Vibrational Energy (zpe) 11812.7 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/6-31+G**
ABC
1.89569 0.33738 0.30244

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.464 0.000
C2 -0.943 -0.708 0.000
O3 1.212 0.369 0.000
H4 -0.474 1.461 0.000
H5 -0.387 -1.642 0.000
H6 -1.588 -0.657 0.880
H7 -1.588 -0.657 -0.880

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.50441.21581.10362.14112.13382.1338
C21.50442.40942.21891.08741.09201.0920
O31.21582.40942.00852.56883.10933.1093
H41.10362.21892.00853.10382.54962.5496
H52.14111.08742.56883.10381.78551.7855
H62.13381.09203.10932.54961.78551.7595
H72.13381.09203.10932.54961.78551.7595

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.364 C1 C2 H6 109.508
C1 C2 H7 109.508 C2 C1 O3 124.345
C2 C1 H4 115.743 O3 C1 H4 119.912
H5 C2 H6 110.027 H5 C2 H7 110.027
H6 C2 H7 107.352
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability