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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: MP3/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 MP3/TZVP
 hartrees
Energy at 0K-153.471343
Energy at 298.15K 
HF Energy-152.971072
Nuclear repulsion energy69.914118
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 MP3/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' 3213 3005 10.45      
2 A' 3093 2892 3.44      
3 A' 3001 2807 102.89      
4 A' 1879 1757 150.74      
5 A' 1501 1404 17.71      
6 A' 1482 1386 11.39      
7 A' 1424 1332 15.56      
8 A' 1161 1086 23.91      
9 A' 917 857 5.97      
10 A' 525 491 14.50      
11 A" 3163 2958 10.19      
12 A" 1497 1400 10.11      
13 A" 1164 1088 0.01      
14 A" 796 745 0.22      
15 A" 157 146 1.35      

Unscaled Zero Point Vibrational Energy (zpe) 12485.9 cm-1
Scaled (by 0.9352) Zero Point Vibrational Energy (zpe) 11676.8 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 MP3/TZVP
ABC
1.90982 0.34071 0.30546

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3/TZVP

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 1.453 0.000
H5 -0.366 -1.644 0.000
H6 -1.576 -0.671 0.879
H7 -1.576 -0.671 -0.879

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.50281.20191.10352.13922.13142.1314
C21.50282.39622.21451.08671.09141.0914
O31.20192.39621.99842.55983.09533.0953
H41.10352.21451.99843.10012.54352.5435
H52.13921.08672.55983.10011.78481.7848
H62.13141.09143.09532.54351.78481.7586
H72.13141.09143.09532.54351.78481.7586

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.378 C1 C2 H6 109.472
C1 C2 H7 109.472 C2 C1 O3 124.370
C2 C1 H4 115.501 O3 C1 H4 120.128
H5 C2 H6 110.060 H5 C2 H7 110.060
H6 C2 H7 107.343
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability