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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: B2PLYP=FULL/aug-cc-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 B2PLYP=FULL/aug-cc-pVTZ
 hartrees
Energy at 0K-153.786771
Energy at 298.15K-153.790701
HF Energy-153.582812
Nuclear repulsion energy69.840853
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 B2PLYP=FULL/aug-cc-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' 3165 3036 7.73 41.32 0.69 0.82
2 A' 3051 2927 2.45 190.69 0.01 0.01
3 A' 2917 2799 112.19 164.17 0.28 0.44
4 A' 1785 1713 170.26 11.59 0.47 0.64
5 A' 1476 1416 23.37 9.22 0.54 0.70
6 A' 1430 1372 9.76 4.46 0.28 0.44
7 A' 1393 1337 21.79 2.01 0.74 0.85
8 A' 1142 1095 23.46 2.73 0.16 0.28
9 A' 898 862 8.34 5.92 0.32 0.48
10 A' 510 489 13.20 1.45 0.30 0.46
11 A" 3108 2982 5.87 57.97 0.75 0.86
12 A" 1488 1428 9.80 3.78 0.75 0.86
13 A" 1143 1096 0.04 1.06 0.75 0.86
14 A" 782 750 1.24 2.90 0.75 0.86
15 A" 157 151 1.38 0.99 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12221.8 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 11725.5 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 B2PLYP=FULL/aug-cc-pVTZ
ABC
1.91580 0.33995 0.30486

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/aug-cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.460 0.000
C2 -0.935 -0.710 0.000
O3 1.205 0.376 0.000
H4 -0.486 1.452 0.000
H5 -0.383 -1.645 0.000
H6 -1.583 -0.655 0.876
H7 -1.583 -0.655 -0.876

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.49731.20811.10532.13932.12472.1247
C21.49732.39952.20861.08531.09071.0907
O31.20812.39952.00462.57053.09863.0986
H41.10532.20862.00463.09922.53212.5321
H52.13931.08532.57053.09921.78451.7845
H62.12471.09073.09862.53211.78451.7513
H72.12471.09073.09862.53211.78451.7513

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.858 C1 C2 H6 109.358
C1 C2 H7 109.358 C2 C1 O3 124.642
C2 C1 H4 115.304 O3 C1 H4 120.054
H5 C2 H6 110.187 H5 C2 H7 110.187
H6 C2 H7 106.800
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability