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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: B2PLYP/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 B2PLYP/6-31G**
 hartrees
Energy at 0K-153.676968
Energy at 298.15K-153.680884
HF Energy-153.525396
Nuclear repulsion energy69.516690
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 B2PLYP/6-31G**
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' 3207 3207 8.73 49.23 0.72 0.84
2 A' 3080 3080 2.39 120.53 0.01 0.03
3 A' 2944 2944 129.67 124.35 0.34 0.50
4 A' 1819 1819 133.33 5.76 0.55 0.71
5 A' 1498 1498 16.01 21.91 0.70 0.82
6 A' 1452 1452 11.58 9.10 0.59 0.75
7 A' 1411 1411 16.41 5.33 0.75 0.85
8 A' 1147 1147 23.56 3.48 0.44 0.61
9 A' 904 904 7.11 6.16 0.38 0.55
10 A' 508 508 13.32 1.26 0.48 0.65
11 A" 3149 3149 8.52 66.91 0.75 0.86
12 A" 1510 1510 8.83 14.55 0.75 0.86
13 A" 1152 1152 0.96 0.85 0.75 0.86
14 A" 786 786 0.55 7.50 0.75 0.86
15 A" 153 153 0.41 1.06 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12359.3 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12359.3 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 B2PLYP/6-31G**
ABC
1.89610 0.33695 0.30205

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.464 0.000
C2 -0.941 -0.711 0.000
O3 1.212 0.374 0.000
H4 -0.492 1.458 0.000
H5 -0.379 -1.643 0.000
H6 -1.590 -0.663 0.878
H7 -1.590 -0.663 -0.878

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.50471.21521.10942.14052.13782.1378
C21.50472.41062.21431.08831.09341.0934
O31.21522.41062.01962.56923.11443.1144
H41.10942.21432.01963.10282.54482.5448
H52.14051.08832.56923.10281.78811.7881
H62.13781.09343.11442.54481.78811.7570
H72.13781.09343.11442.54481.78811.7570

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.243 C1 C2 H6 109.725
C1 C2 H7 109.725 C2 C1 O3 124.477
C2 C1 H4 114.954 O3 C1 H4 120.569
H5 C2 H6 110.088 H5 C2 H7 110.088
H6 C2 H7 106.915
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.297      
2 C -0.399      
3 O -0.382      
4 H 0.070      
5 H 0.144      
6 H 0.135      
7 H 0.135      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.619 -0.259 0.000 2.631
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.676 -0.786 0.012
y -0.786 -17.854 0.004
z 0.012 0.004 -17.685
Traceless
 xyz
x -2.906 -0.786 0.012
y -0.786 1.326 0.004
z 0.012 0.004 1.580
Polar
3z2-r23.159
x2-y2-2.822
xy-0.786
xz0.012
yz0.004


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.371 0.087 -0.001
y 0.087 3.600 -0.000
z -0.001 -0.000 2.580


<r2> (average value of r2) Å2
<r2> 46.895
(<r2>)1/2 6.848