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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: MP2/Sadlej_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 MP2/Sadlej_pVTZ
 hartrees
Energy at 0K-153.429850
Energy at 298.15K-153.433752
HF Energy-152.956414
Nuclear repulsion energy69.149328
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 MP2/Sadlej_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' 3186 3066 5.49      
2 A' 3044 2929 1.98      
3 A' 2919 2808 108.22      
4 A' 1763 1696 133.88      
5 A' 1450 1395 20.52      
6 A' 1407 1354 11.76      
7 A' 1367 1315 16.15      
8 A' 1126 1083 20.16      
9 A' 901 866 5.16      
10 A' 504 485 12.99      
11 A" 3138 3019 4.36      
12 A" 1462 1406 9.38      
13 A" 1122 1079 0.00      
14 A" 770 741 1.15      
15 A" 148 142 1.38      

Unscaled Zero Point Vibrational Energy (zpe) 12152.5 cm-1
Scaled (by 0.9621) Zero Point Vibrational Energy (zpe) 11691.9 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 MP2/Sadlej_pVTZ
ABC
1.86278 0.33504 0.30001

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/Sadlej_pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.464 0.000
C2 -0.946 -0.706 0.000
O3 1.219 0.366 0.000
H4 -0.481 1.478 0.000
H5 -0.391 -1.655 0.000
H6 -1.602 -0.648 0.887
H7 -1.602 -0.648 -0.887

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.50521.22331.12222.15502.14262.1426
C21.50522.41652.23361.09961.10491.1049
O31.22332.41652.03172.58373.12653.1265
H41.12222.23362.03173.13462.56222.5622
H52.15501.09962.58373.13461.80831.8083
H62.14261.10493.12652.56221.80831.7747
H72.14261.10493.12652.56221.80831.7747

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.683 C1 C2 H6 109.387
C1 C2 H7 109.387 C2 C1 O3 124.338
C2 C1 H4 115.680 O3 C1 H4 119.982
H5 C2 H6 110.224 H5 C2 H7 110.224
H6 C2 H7 106.853
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability