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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: CCD/cc-pVTZ

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/cc-pVTZ
 hartrees
Energy at 0K-153.557420
Energy at 298.15K 
HF Energy-152.975107
Nuclear repulsion energy69.904049
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/cc-pVTZ
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 2971 8.03      
2 A' 3064 2861 2.96      
3 A' 2963 2766 99.95      
4 A' 1867 1743 142.61      
5 A' 1487 1389 17.71      
6 A' 1456 1359 11.56      
7 A' 1405 1312 15.84      
8 A' 1151 1075 22.39      
9 A' 912 852 5.95      
10 A' 514 480 14.78      
11 A" 3133 2925 8.06      
12 A" 1497 1398 8.73      
13 A" 1157 1080 0.02      
14 A" 793 740 0.79      
15 A" 159 149 1.32      

Unscaled Zero Point Vibrational Energy (zpe) 12370.8 cm-1
Scaled (by 0.9337) Zero Point Vibrational Energy (zpe) 11550.6 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/cc-pVTZ
ABC
1.91148 0.34055 0.30531

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.463 0.000
C2 -0.931 -0.716 0.000
O3 1.200 0.382 0.000
H4 -0.489 1.453 0.000
H5 -0.366 -1.644 0.000
H6 -1.578 -0.671 0.878
H7 -1.578 -0.671 -0.878

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.50231.20231.10442.13892.13222.1322
C21.50232.39672.21381.08631.09121.0912
O31.20232.39672.00002.56053.09723.0972
H41.10442.21382.00003.09982.54332.5433
H52.13891.08632.56053.09981.78451.7845
H62.13221.09123.09722.54331.78451.7553
H72.13221.09123.09722.54331.78451.7553

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.398 C1 C2 H6 109.576
C1 C2 H7 109.576 C2 C1 O3 124.410
C2 C1 H4 115.417 O3 C1 H4 120.173
H5 C2 H6 110.069 H5 C2 H7 110.069
H6 C2 H7 107.090
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability