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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: MP2=FULL/cc-pVTZ

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-pVTZ
 hartrees
Energy at 0K-153.586293
Energy at 298.15K-153.590253
HF Energy-152.974586
Nuclear repulsion energy69.973136
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-pVTZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3210 3047 5.09 41.84 0.72 0.84
2 A' 3094 2938 1.76 151.50 0.01 0.02
3 A' 2973 2823 112.20 148.26 0.29 0.45
4 A' 1795 1704 119.14 7.05 0.68 0.81
5 A' 1487 1412 20.77 11.86 0.63 0.77
6 A' 1452 1379 7.98 7.06 0.35 0.52
7 A' 1395 1324 24.72 2.08 0.67 0.80
8 A' 1150 1092 21.59 2.28 0.21 0.34
9 A' 913 867 6.85 5.33 0.33 0.49
10 A' 511 485 13.07 1.50 0.43 0.60
11 A" 3162 3002 4.14 56.72 0.75 0.86
12 A" 1501 1425 9.75 6.28 0.75 0.86
13 A" 1151 1093 0.04 1.13 0.75 0.86
14 A" 793 752 1.05 3.71 0.75 0.86
15 A" 170 161 0.85 0.82 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12377.1 cm-1
Scaled (by 0.9494) Zero Point Vibrational Energy (zpe) 11750.9 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-pVTZ
ABC
1.91994 0.34171 0.30631

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.459 0.000
C2 -0.937 -0.701 0.000
O3 1.206 0.366 0.000
H4 -0.480 1.449 0.000
H5 -0.385 -1.632 0.000
H6 -1.581 -0.646 0.874
H7 -1.581 -0.646 -0.874

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.49191.20981.09992.12622.11762.1176
C21.49192.39432.19861.08191.08671.0867
O31.20982.39432.00402.55373.09093.0909
H41.09992.19862.00403.08222.52292.5229
H52.12621.08192.55373.08221.77921.7792
H62.11761.08673.09092.52291.77921.7480
H72.11761.08673.09092.52291.77921.7480

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.384 C1 C2 H6 109.404
C1 C2 H7 109.404 C2 C1 O3 124.479
C2 C1 H4 115.221 O3 C1 H4 120.300
H5 C2 H6 110.253 H5 C2 H7 110.253
H6 C2 H7 107.076
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability