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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: CCD/TZVP

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/TZVP
 hartrees
Energy at 0K-153.475317
Energy at 298.15K 
HF Energy-152.970802
Nuclear repulsion energy69.798352
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/TZVP
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' 3193 3027 11.12      
2 A' 3075 2915 4.02      
3 A' 2980 2825 105.38      
4 A' 1858 1761 140.01      
5 A' 1500 1422 16.81      
6 A' 1476 1400 11.15      
7 A' 1425 1350 13.80      
8 A' 1159 1099 23.15      
9 A' 913 866 6.14      
10 A' 523 496 14.02      
11 A" 3145 2982 11.23      
12 A" 1497 1419 9.66      
13 A" 1161 1100 0.00      
14 A" 796 755 0.18      
15 A" 155 147 1.37      

Unscaled Zero Point Vibrational Energy (zpe) 12428.0 cm-1
Scaled (by 0.948) Zero Point Vibrational Energy (zpe) 11781.8 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/TZVP
ABC
1.90540 0.33952 0.30444

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.463 0.000
C2 -0.933 -0.716 0.000
O3 1.202 0.381 0.000
H4 -0.488 1.455 0.000
H5 -0.369 -1.646 0.000
H6 -1.579 -0.670 0.881
H7 -1.579 -0.670 -0.881

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.50421.20471.10522.14182.13392.1339
C21.50422.40062.21661.08811.09271.0927
O31.20472.40062.00222.56463.10043.1004
H41.10522.21662.00223.10382.54642.5464
H52.14181.08812.56463.10381.78651.7865
H62.13391.09273.10042.54641.78651.7611
H72.13391.09273.10042.54641.78651.7611

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 109.492
C1 C2 H7 109.492 C2 C1 O3 124.425
C2 C1 H4 115.461 O3 C1 H4 120.114
H5 C2 H6 110.007 H5 C2 H7 110.007
H6 C2 H7 107.390
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability