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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: B3LYP/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 B3LYP/6-311G*
 hartrees
Energy at 0K-153.871138
Energy at 298.15K-153.875054
HF Energy-153.871138
Nuclear repulsion energy69.683010
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 B3LYP/6-311G*
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' 3138 3032 15.30 54.72 0.70 0.83
2 A' 3025 2923 3.57 140.19 0.01 0.03
3 A' 2867 2770 155.52 162.44 0.34 0.51
4 A' 1827 1765 178.60 8.61 0.72 0.83
5 A' 1478 1428 24.21 17.39 0.65 0.79
6 A' 1436 1387 13.02 7.55 0.60 0.75
7 A' 1390 1343 26.46 4.68 0.71 0.83
8 A' 1133 1094 25.07 2.09 0.37 0.54
9 A' 886 856 8.82 5.49 0.42 0.60
10 A' 509 492 13.32 1.51 0.50 0.67
11 A" 3077 2974 12.94 72.61 0.75 0.86
12 A" 1485 1435 12.31 10.61 0.75 0.86
13 A" 1139 1101 0.73 1.23 0.75 0.86
14 A" 777 751 0.82 6.26 0.75 0.86
15 A" 159 154 0.43 1.16 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12162.9 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 11753.0 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 B3LYP/6-311G*
ABC
1.91089 0.33765 0.30298

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.462 0.000
C2 -0.930 -0.723 0.000
O3 1.202 0.392 0.000
H4 -0.504 1.455 0.000
H5 -0.363 -1.654 0.000
H6 -1.584 -0.685 0.878
H7 -1.584 -0.685 -0.878

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.50621.20381.11382.14722.14392.1439
C21.50622.40582.21971.09001.09571.0957
O31.20382.40582.00952.57653.11333.1133
H41.11382.21972.00953.11282.55352.5535
H52.14721.09002.57653.11281.78891.7889
H62.14391.09573.11332.55351.78891.7566
H72.14391.09573.11332.55351.78891.7566

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.563 C1 C2 H6 109.958
C1 C2 H7 109.958 C2 C1 O3 124.812
C2 C1 H4 114.995 O3 C1 H4 120.193
H5 C2 H6 109.859 H5 C2 H7 109.859
H6 C2 H7 106.562
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.122      
2 C -0.679      
3 O -0.274      
4 H 0.144      
5 H 0.232      
6 H 0.227      
7 H 0.227      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.639 -0.284 0.000 2.654
CHELPG        
AIM        
ESP -2.650 -0.288 0.000 2.666


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.953 -0.869 0.000
y -0.869 -18.114 0.000
z 0.000 0.000 -17.925
Traceless
 xyz
x -2.933 -0.869 0.000
y -0.869 1.325 0.000
z 0.000 0.000 1.609
Polar
3z2-r23.217
x2-y2-2.839
xy-0.869
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.618 0.121 0.000
y 0.121 3.943 0.000
z 0.000 0.000 2.787


<r2> (average value of r2) Å2
<r2> 46.995
(<r2>)1/2 6.855