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: TPSSh/daug-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 TPSSh/daug-cc-pVTZ
 hartrees
Energy at 0K-153.896312
Energy at 298.15K-153.900206
HF Energy-153.896312
Nuclear repulsion energy69.678913
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 TPSSh/daug-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' 3137 3137 10.39 44.86 0.68 0.81
2 A' 3018 3018 3.01 195.59 0.01 0.01
3 A' 2868 2868 124.44 173.52 0.30 0.46
4 A' 1788 1788 185.26 12.46 0.48 0.65
5 A' 1469 1469 22.59 9.72 0.53 0.70
6 A' 1420 1420 10.33 3.54 0.36 0.53
7 A' 1380 1380 20.66 2.73 0.71 0.83
8 A' 1130 1130 24.82 2.73 0.19 0.31
9 A' 882 882 9.58 6.23 0.34 0.51
10 A' 497 497 12.68 1.33 0.30 0.47
11 A" 3073 3073 7.64 62.26 0.75 0.86
12 A" 1479 1479 9.19 3.95 0.75 0.86
13 A" 1131 1131 0.01 1.17 0.75 0.86
14 A" 764 764 1.29 3.36 0.75 0.86
15 A" 157 157 1.08 1.10 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12095.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12095.8 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 TPSSh/daug-cc-pVTZ
ABC
1.90547 0.33838 0.30342

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.461 0.000
C2 -0.934 -0.715 0.000
O3 1.206 0.381 0.000
H4 -0.491 1.458 0.000
H5 -0.380 -1.653 0.000
H6 -1.586 -0.662 0.878
H7 -1.586 -0.662 -0.878

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.50201.20861.11102.14752.13222.1322
C21.50202.40442.21771.08861.09481.0948
O31.20862.40442.00982.57903.10683.1068
H41.11102.21772.00983.11222.54172.5417
H52.14751.08862.57903.11221.79071.7907
H62.13221.09483.10682.54171.79071.7554
H72.13221.09483.10682.54171.79071.7554

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.979 C1 C2 H6 109.382
C1 C2 H7 109.382 C2 C1 O3 124.645
C2 C1 H4 115.325 O3 C1 H4 120.029
H5 C2 H6 110.202 H5 C2 H7 110.202
H6 C2 H7 106.590
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/daug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.432      
2 C -0.032      
3 O -1.151      
4 H 0.350      
5 H 0.157      
6 H 0.122      
7 H 0.122      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.803 -0.327 0.000 2.822
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.481 0.235 0.000
y 0.235 4.741 0.000
z 0.000 0.000 3.598


<r2> (average value of r2) Å2
<r2> 46.936
(<r2>)1/2 6.851