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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: MP2=FULL/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2=FULL/cc-pVDZ
 hartrees
Energy at 0K-153.393514
Energy at 298.15K-153.397456
HF Energy-152.927019
Nuclear repulsion energy69.245281
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 MP2=FULL/cc-pVDZ
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' 3228 3068 5.80 52.54 0.74 0.85
2 A' 3090 2937 2.52 134.55 0.01 0.02
3 A' 2951 2805 140.86 156.13 0.31 0.48
4 A' 1800 1711 113.20 6.07 0.74 0.85
5 A' 1462 1389 16.91 19.04 0.67 0.80
6 A' 1433 1362 12.86 8.18 0.48 0.65
7 A' 1377 1308 18.18 3.53 0.70 0.82
8 A' 1137 1081 21.86 2.62 0.27 0.42
9 A' 909 864 5.37 5.95 0.40 0.58
10 A' 504 479 12.64 1.49 0.45 0.62
11 A" 3184 3026 5.61 68.45 0.75 0.86
12 A" 1476 1403 9.88 11.75 0.75 0.86
13 A" 1133 1077 0.36 1.44 0.75 0.86
14 A" 779 741 0.67 5.46 0.75 0.86
15 A" 171 163 0.31 1.04 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12316.6 cm-1
Scaled (by 0.9504) Zero Point Vibrational Energy (zpe) 11705.7 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 MP2=FULL/cc-pVDZ
ABC
1.87577 0.33494 0.30024

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.464 0.000
C2 -0.942 -0.714 0.000
O3 1.215 0.378 0.000
H4 -0.503 1.465 0.000
H5 -0.374 -1.655 0.000
H6 -1.595 -0.665 0.887
H7 -1.595 -0.665 -0.887

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.50801.21791.12042.15122.14602.1460
C21.50802.41712.22261.09851.10261.1026
O31.21792.41712.03312.57983.12573.1257
H41.12042.22262.03313.12212.55252.5525
H52.15121.09852.57983.12211.80461.8046
H62.14601.10263.12572.55251.80461.7735
H72.14601.10263.12572.55251.80461.7735

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.254 C1 C2 H6 109.594
C1 C2 H7 109.594 C2 C1 O3 124.587
C2 C1 H4 114.672 O3 C1 H4 120.741
H5 C2 H6 110.137 H5 C2 H7 110.137
H6 C2 H7 107.067
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability