return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: B2PLYP=FULLultrafine/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 B2PLYP=FULLultrafine/6-31G
 hartrees
Energy at 0K-153.569695
Energy at 298.15K 
HF Energy-153.462042
Nuclear repulsion energy68.827196
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=FULLultrafine/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' 3186 3186 11.42 48.46 0.73 0.84
2 A' 3061 3061 3.44 132.45 0.01 0.02
3 A' 2993 2993 115.14 125.27 0.37 0.54
4 A' 1701 1701 90.87 2.56 0.57 0.72
5 A' 1525 1525 25.10 24.88 0.71 0.83
6 A' 1456 1456 24.44 9.26 0.70 0.82
7 A' 1451 1451 9.89 10.62 0.63 0.77
8 A' 1167 1167 26.11 4.24 0.50 0.66
9 A' 925 925 7.25 6.48 0.35 0.52
10 A' 512 512 13.48 1.92 0.53 0.69
11 A" 3128 3128 10.00 71.01 0.75 0.86
12 A" 1536 1536 13.93 18.41 0.75 0.86
13 A" 1167 1167 0.66 0.31 0.75 0.86
14 A" 814 814 2.02 8.30 0.75 0.86
15 A" 150 150 0.46 1.24 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12385.6 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12385.6 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=FULLultrafine/6-31G
ABC
1.86646 0.33081 0.29652

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULLultrafine/6-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.467 0.000
C2 -0.967 -0.687 0.000
O3 1.239 0.344 0.000
H4 -0.456 1.472 0.000
H5 -0.422 -1.633 0.000
H6 -1.616 -0.636 0.883
H7 -1.616 -0.636 -0.883

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.50561.24461.10372.14212.14632.1463
C21.50562.43462.21911.09161.09691.0969
O31.24462.43462.03542.58223.14463.1446
H41.10372.21912.03543.10552.56292.5629
H52.14211.09162.58223.10551.78881.7888
H62.14631.09693.14462.56291.78881.7651
H72.14631.09693.14462.56291.78881.7651

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.111 C1 C2 H6 110.126
C1 C2 H7 110.126 C2 C1 O3 124.292
C2 C1 H4 115.664 O3 C1 H4 120.044
H5 C2 H6 109.646 H5 C2 H7 109.646
H6 C2 H7 107.136
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability