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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: MP3=FULL/6-31G*

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/6-31G*
 hartrees
Energy at 0K-153.373396
Energy at 298.15K-153.377332
HF Energy-152.914708
Nuclear repulsion energy69.644134
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/6-31G*
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' 3226 3027 7.05      
2 A' 3104 2913 2.21      
3 A' 3009 2824 103.93      
4 A' 1896 1779 125.49      
5 A' 1527 1433 16.53      
6 A' 1483 1392 14.45      
7 A' 1445 1356 16.98      
8 A' 1172 1100 22.94      
9 A' 934 877 4.58      
10 A' 522 490 15.25      
11 A" 3174 2978 7.63      
12 A" 1531 1437 10.83      
13 A" 1179 1106 0.53      
14 A" 804 755 0.96      
15 A" 149 140 0.83      

Unscaled Zero Point Vibrational Energy (zpe) 12578.0 cm-1
Scaled (by 0.9383) Zero Point Vibrational Energy (zpe) 11801.9 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/6-31G*
ABC
1.89201 0.33887 0.30363

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3=FULL/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.465 0.000
C2 -0.936 -0.716 0.000
O3 1.206 0.381 0.000
H4 -0.498 1.457 0.000
H5 -0.362 -1.644 0.000
H6 -1.585 -0.677 0.882
H7 -1.585 -0.677 -0.882

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.50691.20871.11002.13912.14332.1433
C21.50692.40662.21671.09101.09571.0957
O31.20872.40662.01492.56053.11213.1121
H41.11002.21672.01493.10342.55222.5522
H52.13911.09102.56053.10341.79111.7911
H62.14331.09573.11212.55221.79111.7645
H72.14331.09573.11212.55221.79111.7645

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 109.816 C1 C2 H6 109.876
C1 C2 H7 109.876 C2 C1 O3 124.439
C2 C1 H4 114.943 O3 C1 H4 120.618
H5 C2 H6 109.988 H5 C2 H7 109.988
H6 C2 H7 107.260
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability