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/Def2TZVPP

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/Def2TZVPP
 hartrees
Energy at 0K-153.562118
Energy at 298.15K 
HF Energy-152.981463
Nuclear repulsion energy69.921719
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/Def2TZVPP
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' 3186 3186 7.84      
2 A' 3067 3067 2.89      
3 A' 2968 2968 95.16      
4 A' 1861 1861 148.80      
5 A' 1487 1487 18.34      
6 A' 1456 1456 11.63      
7 A' 1409 1409 15.09      
8 A' 1152 1152 23.00      
9 A' 912 912 5.95      
10 A' 514 514 14.58      
11 A" 3135 3135 7.46      
12 A" 1498 1498 9.07      
13 A" 1158 1158 0.01      
14 A" 791 791 0.84      
15 A" 161 161 1.50      

Unscaled Zero Point Vibrational Energy (zpe) 12377.3 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12377.3 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/Def2TZVPP
ABC
1.91172 0.34077 0.30549

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/Def2TZVPP

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 1.199 0.381 0.000
H4 -0.487 1.454 0.000
H5 -0.367 -1.645 0.000
H6 -1.577 -0.669 0.878
H7 -1.577 -0.669 -0.878

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.50191.20211.10392.13912.13052.1305
C21.50192.39602.21441.08621.09111.0911
O31.20212.39601.99842.56073.09563.0956
H41.10392.21441.99843.10042.54252.5425
H52.13911.08622.56073.10041.78501.7850
H62.13051.09113.09562.54251.78501.7553
H72.13051.09113.09562.54251.78501.7553

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.452 C1 C2 H6 109.479
C1 C2 H7 109.479 C2 C1 O3 124.398
C2 C1 H4 115.528 O3 C1 H4 120.074
H5 C2 H6 110.132 H5 C2 H7 110.132
H6 C2 H7 107.102
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability