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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: CCSD/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at CCSD/6-311G**
 hartrees
Energy at 0K-153.467139
Energy at 298.15K 
HF Energy-152.956398
Nuclear repulsion energy69.565258
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 CCSD/6-311G**
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' 3174 3174 11.55      
2 A' 3057 3057 4.15      
3 A' 2944 2944 122.04      
4 A' 1842 1842 139.49      
5 A' 1489 1489 16.24      
6 A' 1455 1455 14.23      
7 A' 1406 1406 13.68      
8 A' 1148 1148 23.15      
9 A' 907 907 5.28      
10 A' 513 513 14.47      
11 A" 3126 3126 12.35      
12 A" 1497 1497 9.22      
13 A" 1149 1149 0.09      
14 A" 790 790 0.25      
15 A" 157 157 0.90      

Unscaled Zero Point Vibrational Energy (zpe) 12326.0 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12326.0 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 CCSD/6-311G**
ABC
1.88986 0.33727 0.30236

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/6-311G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.466 0.000
C2 -0.934 -0.722 0.000
O3 1.204 0.386 0.000
H4 -0.500 1.459 0.000
H5 -0.359 -1.651 0.000
H6 -1.582 -0.680 0.884
H7 -1.582 -0.680 -0.884

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.51191.20661.11122.14742.14432.1443
C21.51192.40862.22381.09231.09691.0969
O31.20662.40862.01322.56793.11143.1114
H41.11122.22382.01323.11272.55442.5544
H52.14741.09232.56793.11271.79471.7947
H62.14431.09693.11142.55441.79471.7680
H72.14431.09693.11142.55441.79471.7680

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.056 C1 C2 H6 109.539
C1 C2 H7 109.539 C2 C1 O3 124.377
C2 C1 H4 115.086 O3 C1 H4 120.538
H5 C2 H6 110.130 H5 C2 H7 110.130
H6 C2 H7 107.402
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability