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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: CID/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at CID/6-31G*
 hartrees
Energy at 0K-153.320026
Energy at 298.15K 
HF Energy-152.915231
Nuclear repulsion energy69.821976
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 CID/6-31G*
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' 3265 3016 8.15      
2 A' 3143 2903 2.86      
3 A' 3056 2822 107.62      
4 A' 1928 1781 148.22      
5 A' 1549 1431 16.53      
6 A' 1504 1389 16.05      
7 A' 1471 1358 14.14      
8 A' 1190 1099 23.81      
9 A' 945 873 4.41      
10 A' 528 488 16.15      
11 A" 3212 2967 9.07      
12 A" 1554 1436 10.40      
13 A" 1203 1111 0.85      
14 A" 819 756 0.59      
15 A" 148 137 1.04      

Unscaled Zero Point Vibrational Energy (zpe) 12756.5 cm-1
Scaled (by 0.9237) Zero Point Vibrational Energy (zpe) 11783.2 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 CID/6-31G*
ABC
1.90658 0.33998 0.30478

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.464 0.000
C2 -0.935 -0.712 0.000
O3 1.203 0.377 0.000
H4 -0.486 1.455 0.000
H5 -0.366 -1.639 0.000
H6 -1.581 -0.672 0.879
H7 -1.581 -0.672 -0.879

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.50211.20581.10402.13432.13612.1361
C21.50212.39882.21341.08731.09221.0922
O31.20582.39882.00322.55443.10223.1022
H41.10402.21342.00323.09652.54902.5490
H52.13431.08732.55443.09651.78481.7848
H62.13611.09223.10222.54901.78481.7582
H72.13611.09223.10222.54901.78481.7582

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 109.996 C1 C2 H6 109.846
C1 C2 H7 109.846 C2 C1 O3 124.349
C2 C1 H4 115.428 O3 C1 H4 120.222
H5 C2 H6 109.952 H5 C2 H7 109.952
H6 C2 H7 107.206
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability