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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: MP2/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/6-311G*
 hartrees
Energy at 0K-153.413194
Energy at 298.15K-153.417123
HF Energy-152.949485
Nuclear repulsion energy69.520003
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 MP2/6-311G*
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' 3206 3047 8.03 48.90 0.74 0.85
2 A' 3078 2925 2.53 128.23 0.01 0.02
3 A' 2956 2809 134.40 154.13 0.33 0.49
4 A' 1792 1703 112.13 6.01 0.74 0.85
5 A' 1504 1430 23.86 16.14 0.67 0.80
6 A' 1452 1380 13.72 9.02 0.47 0.64
7 A' 1415 1345 26.34 3.35 0.60 0.75
8 A' 1155 1098 22.62 2.44 0.35 0.52
9 A' 911 865 6.12 5.88 0.41 0.58
10 A' 514 488 12.65 1.62 0.46 0.63
11 A" 3159 3002 7.67 64.19 0.75 0.86
12 A" 1509 1434 13.67 10.11 0.75 0.86
13 A" 1153 1095 0.24 0.94 0.75 0.86
14 A" 788 749 1.25 6.27 0.75 0.86
15 A" 155 147 0.51 1.03 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12372.4 cm-1
Scaled (by 0.9503) Zero Point Vibrational Energy (zpe) 11757.5 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 MP2/6-311G*
ABC
1.89625 0.33686 0.30205

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.464 0.000
C2 -0.941 -0.712 0.000
O3 1.210 0.376 0.000
H4 -0.487 1.462 0.000
H5 -0.375 -1.643 0.000
H6 -1.589 -0.668 0.880
H7 -1.589 -0.668 -0.880

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.50571.21361.11052.14012.14052.1405
C21.50572.41062.22081.08961.09431.0943
O31.21362.41062.01482.56733.11513.1151
H41.11052.22082.01483.10722.55482.5548
H52.14011.08962.56733.10721.78911.7891
H62.14051.09433.11512.55481.78911.7603
H72.14051.09433.11512.55481.78911.7603

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.059 C1 C2 H6 109.814
C1 C2 H7 109.814 C2 C1 O3 124.521
C2 C1 H4 115.343 O3 C1 H4 120.136
H5 C2 H6 110.011 H5 C2 H7 110.011
H6 C2 H7 107.083
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability