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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: MP3=FULL/cc-pVDZ

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=FULL/cc-pVDZ
 hartrees
Energy at 0K-153.412281
Energy at 298.15K 
HF Energy-152.928138
Nuclear repulsion energy69.470129
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=FULL/cc-pVDZ
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' 3220 3027 7.89      
2 A' 3093 2908 3.08      
3 A' 2976 2798 120.62      
4 A' 1896 1783 142.58      
5 A' 1470 1382 15.88      
6 A' 1452 1365 15.30      
7 A' 1390 1307 13.66      
8 A' 1143 1075 23.02      
9 A' 916 861 4.31      
10 A' 511 481 14.53      
11 A" 3174 2985 8.34      
12 A" 1481 1392 9.19      
13 A" 1146 1078 0.23      
14 A" 786 739 0.56      
15 A" 171 160 0.61      

Unscaled Zero Point Vibrational Energy (zpe) 12411.4 cm-1
Scaled (by 0.9403) Zero Point Vibrational Energy (zpe) 11670.4 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=FULL/cc-pVDZ
ABC
1.88077 0.33686 0.30195

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3=FULL/cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.466 0.000
C2 -0.932 -0.724 0.000
O3 1.204 0.389 0.000
H4 -0.508 1.462 0.000
H5 -0.354 -1.659 0.000
H6 -1.586 -0.683 0.888
H7 -1.586 -0.683 -0.888

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.51171.20601.11872.15392.15012.1501
C21.51172.40882.22751.09901.10311.1031
O31.20602.40882.02002.57343.11753.1175
H41.11872.22752.02003.12512.56002.5600
H52.15391.09902.57343.12511.80471.8047
H62.15011.10313.11752.56001.80471.7756
H72.15011.10313.11752.56001.80471.7756

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.183 C1 C2 H6 109.634
C1 C2 H7 109.634 C2 C1 O3 124.453
C2 C1 H4 114.920 O3 C1 H4 120.628
H5 C2 H6 110.079 H5 C2 H7 110.079
H6 C2 H7 107.181
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability