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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: MP2=FULL/6-31+G**

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/6-31+G**
 hartrees
Energy at 0K-153.402249
Energy at 298.15K-153.406160
HF Energy-152.925328
Nuclear repulsion energy69.445278
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/6-31+G**
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' 3258 3060 6.12 44.37 0.74 0.85
2 A' 3120 2931 2.76 146.40 0.01 0.02
3 A' 3021 2837 109.50 147.37 0.32 0.49
4 A' 1774 1666 129.81 8.97 0.45 0.62
5 A' 1511 1419 22.15 13.10 0.67 0.81
6 A' 1455 1367 12.26 8.24 0.34 0.50
7 A' 1427 1340 16.72 3.28 0.68 0.81
8 A' 1163 1092 21.56 2.83 0.32 0.49
9 A' 921 865 6.13 5.68 0.39 0.56
10 A' 513 482 12.95 1.50 0.39 0.56
11 A" 3209 3014 5.68 61.20 0.75 0.86
12 A" 1518 1425 11.99 7.63 0.75 0.86
13 A" 1157 1087 0.00 0.85 0.75 0.86
14 A" 793 745 0.92 5.51 0.75 0.86
15 A" 139 131 1.34 1.19 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12489.8 cm-1
Scaled (by 0.9392) Zero Point Vibrational Energy (zpe) 11730.4 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/6-31+G**
ABC
1.89483 0.33661 0.30173

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31+G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.462 0.000
C2 -0.951 -0.696 0.000
O3 1.221 0.356 0.000
H4 -0.465 1.463 0.000
H5 -0.405 -1.635 0.000
H6 -1.595 -0.637 0.878
H7 -1.595 -0.637 -0.878

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.49891.22541.10352.13612.12632.1263
C21.49892.41362.21311.08571.09021.0902
O31.22542.41362.01662.57133.11193.1119
H41.10352.21312.01663.09842.54032.5403
H52.13611.08572.57133.09841.78381.7838
H62.12631.09023.11192.54031.78381.7556
H72.12631.09023.11192.54031.78381.7556

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.457 C1 C2 H6 109.402
C1 C2 H7 109.402 C2 C1 O3 124.434
C2 C1 H4 115.675 O3 C1 H4 119.891
H5 C2 H6 110.128 H5 C2 H7 110.128
H6 C2 H7 107.262
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability