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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-153.680729
Energy at 298.15K 
HF Energy-153.525419
Nuclear repulsion energy69.536200
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' 3208 3208 8.66 49.17 0.72 0.84
2 A' 3081 3081 2.36 120.39 0.01 0.03
3 A' 2945 2945 129.59 124.19 0.34 0.50
4 A' 1820 1820 133.40 5.77 0.55 0.71
5 A' 1498 1498 16.06 21.87 0.70 0.82
6 A' 1453 1453 11.61 9.09 0.59 0.75
7 A' 1411 1411 16.55 5.34 0.75 0.85
8 A' 1147 1147 23.54 3.46 0.44 0.61
9 A' 904 904 7.12 6.14 0.38 0.55
10 A' 508 508 13.32 1.26 0.48 0.65
11 A" 3150 3150 8.43 66.81 0.75 0.86
12 A" 1510 1510 8.87 14.53 0.75 0.86
13 A" 1153 1153 0.97 0.85 0.75 0.86
14 A" 787 787 0.55 7.48 0.75 0.86
15 A" 154 154 0.41 1.06 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12364.5 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12364.5 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=FULLultrafine/6-31G**
ABC
1.89745 0.33712 0.30222

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 0.463 0.000
C2 -0.940 -0.710 0.000
O3 1.212 0.374 0.000
H4 -0.492 1.457 0.000
H5 -0.379 -1.642 0.000
H6 -1.590 -0.663 0.878
H7 -1.590 -0.663 -0.878

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.50411.21491.10912.13982.13712.1371
C21.50412.40992.21361.08801.09311.0931
O31.21492.40992.01912.56863.11353.1135
H41.10912.21362.01913.10182.54392.5439
H52.13981.08802.56863.10181.78761.7876
H62.13711.09313.11352.54391.78761.7564
H72.13711.09313.11352.54391.78761.7564

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.247 C1 C2 H6 109.726
C1 C2 H7 109.726 C2 C1 O3 124.486
C2 C1 H4 114.950 O3 C1 H4 120.564
H5 C2 H6 110.086 H5 C2 H7 110.086
H6 C2 H7 106.912
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability