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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: B2PLYP=FULLultrafine/STO-3G

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/STO-3G
 hartrees
Energy at 0K-151.586460
Energy at 298.15K 
HF Energy-151.523921
Nuclear repulsion energy67.644728
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/STO-3G
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' 3537 3537 0.31 24.91 0.75 0.86
2 A' 3344 3344 0.31 42.16 0.01 0.03
3 A' 3233 3233 41.34 47.26 0.35 0.52
4 A' 1829 1829 26.01 1.28 0.02 0.05
5 A' 1686 1686 7.32 17.69 0.73 0.85
6 A' 1562 1562 4.72 5.62 0.74 0.85
7 A' 1492 1492 10.47 10.52 0.74 0.85
8 A' 1187 1187 23.65 5.23 0.57 0.72
9 A' 959 959 5.41 5.47 0.32 0.48
10 A' 497 497 5.30 1.30 0.57 0.73
11 A" 3510 3510 0.07 31.72 0.75 0.86
12 A" 1687 1687 4.38 14.30 0.75 0.86
13 A" 1161 1161 0.98 0.19 0.75 0.86
14 A" 805 805 2.69 3.03 0.75 0.86
15 A" 151 151 0.31 0.48 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 13320.6 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 13320.6 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/STO-3G
ABC
1.82009 0.31596 0.28372

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.480 0.000
C2 -0.972 -0.737 0.000
O3 1.251 0.393 0.000
H4 -0.529 1.473 0.000
H5 -0.410 -1.681 0.000
H6 -1.618 -0.698 0.891
H7 -1.618 -0.698 -0.891

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.55751.25391.12462.20012.19092.1909
C21.55752.49352.25331.09901.10121.1012
O31.25392.49352.08162.65753.19613.1961
H41.12462.25332.08163.15612.58682.5868
H52.20011.09902.65753.15611.79431.7943
H62.19091.10123.19612.58681.79431.7819
H72.19091.10123.19612.58681.79431.7819

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.637 C1 C2 H6 109.797
C1 C2 H7 109.797 C2 C1 O3 124.635
C2 C1 H4 113.328 O3 C1 H4 122.038
H5 C2 H6 109.277 H5 C2 H7 109.277
H6 C2 H7 108.008
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability