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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: B2PLYP=FULL/3-21G

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/3-21G
 hartrees
Energy at 0K-152.770483
Energy at 298.15K-152.774430
HF Energy-152.663663
Nuclear repulsion energy68.815316
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/3-21G
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 3033 8.79 45.96 0.71 0.83
2 A' 3074 2926 1.38 103.82 0.02 0.03
3 A' 2939 2798 129.61 115.28 0.35 0.51
4 A' 1714 1632 70.13 1.47 0.50 0.67
5 A' 1542 1468 24.01 25.20 0.72 0.84
6 A' 1467 1396 3.01 13.24 0.67 0.81
7 A' 1450 1380 33.26 6.40 0.75 0.86
8 A' 1144 1089 27.14 3.88 0.53 0.69
9 A' 882 840 12.82 6.46 0.31 0.47
10 A' 493 470 10.50 1.47 0.52 0.68
11 A" 3130 2979 6.45 63.84 0.75 0.86
12 A" 1562 1487 13.13 19.11 0.75 0.86
13 A" 1175 1119 1.16 0.72 0.75 0.86
14 A" 826 786 2.66 7.70 0.75 0.86
15 A" 168 160 0.09 1.16 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12374.7 cm-1
Scaled (by 0.952) Zero Point Vibrational Energy (zpe) 11780.7 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/3-21G
ABC
1.89022 0.32800 0.29489

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.464 0.000
C2 -0.959 -0.711 0.000
O3 1.233 0.376 0.000
H4 -0.510 1.444 0.000
H5 -0.397 -1.645 0.000
H6 -1.604 -0.662 0.884
H7 -1.604 -0.662 -0.884

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.51661.23651.10462.14612.15002.1500
C21.51662.44692.20141.09001.09541.0954
O31.23652.44692.04412.59673.14803.1480
H41.10462.20142.04413.09112.53272.5327
H52.14611.09002.59673.09111.79021.7902
H62.15001.09543.14802.53271.79021.7675
H72.15001.09543.14802.53271.79021.7675

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 109.754 C1 C2 H6 109.743
C1 C2 H7 109.743 C2 C1 O3 125.137
C2 C1 H4 113.313 O3 C1 H4 121.550
H5 C2 H6 110.001 H5 C2 H7 110.001
H6 C2 H7 107.569
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability