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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: MP3=FULL/aug-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/aug-cc-pVDZ
 hartrees
Energy at 0K-153.444540
Energy at 298.15K 
HF Energy-152.938083
Nuclear repulsion energy69.386335
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/aug-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' 3193 3193 9.30      
2 A' 3067 3067 3.51      
3 A' 2986 2986 92.62      
4 A' 1848 1848 161.76      
5 A' 1460 1460 18.70      
6 A' 1437 1437 11.94      
7 A' 1382 1382 14.08      
8 A' 1140 1140 21.63      
9 A' 910 910 4.51      
10 A' 509 509 15.25      
11 A" 3141 3141 8.59      
12 A" 1468 1468 8.51      
13 A" 1137 1137 0.01      
14 A" 777 777 1.08      
15 A" 163 163 1.82      

Unscaled Zero Point Vibrational Energy (zpe) 12308.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12308.9 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/aug-cc-pVDZ
ABC
1.87653 0.33630 0.30135

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.466 0.000
C2 -0.938 -0.718 0.000
O3 1.209 0.380 0.000
H4 -0.486 1.469 0.000
H5 -0.372 -1.659 0.000
H6 -1.591 -0.666 0.887
H7 -1.591 -0.666 -0.887

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.51051.21191.11452.15652.14462.1446
C21.51052.41152.23291.09761.10251.1025
O31.21192.41152.01462.57953.11783.1178
H41.11452.23292.01463.12912.56212.5621
H52.15651.09762.57953.12911.80481.8048
H62.14461.10253.11782.56211.80481.7736
H72.14461.10253.11782.56211.80481.7736

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.549 C1 C2 H6 109.326
C1 C2 H7 109.326 C2 C1 O3 124.336
C2 C1 H4 115.736 O3 C1 H4 119.927
H5 C2 H6 110.237 H5 C2 H7 110.237
H6 C2 H7 107.096
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability