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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: PBEPBEultrafine/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 PBEPBEultrafine/6-31G**
 hartrees
Energy at 0K-153.645053
Energy at 298.15K-153.648900
HF Energy-153.645053
Nuclear repulsion energy69.114652
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 PBEPBEultrafine/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' 3108 3066 7.85 52.71 0.72 0.84
2 A' 2977 2937 1.34 131.45 0.01 0.02
3 A' 2790 2752 147.95 137.33 0.34 0.50
4 A' 1784 1759 144.39 6.98 0.51 0.68
5 A' 1422 1402 16.72 24.97 0.67 0.80
6 A' 1390 1371 10.52 8.25 0.68 0.81
7 A' 1329 1310 26.38 8.79 0.72 0.84
8 A' 1094 1079 24.46 3.14 0.42 0.59
9 A' 866 854 8.91 5.75 0.43 0.61
10 A' 489 482 10.76 1.17 0.52 0.68
11 A" 3046 3004 5.27 71.80 0.75 0.86
12 A" 1433 1414 10.05 15.00 0.75 0.86
13 A" 1093 1078 1.33 1.39 0.75 0.86
14 A" 742 732 1.44 7.96 0.75 0.86
15 A" 153 151 0.03 1.22 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 11857.3 cm-1
Scaled (by 0.9863) Zero Point Vibrational Energy (zpe) 11694.9 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 PBEPBEultrafine/6-31G**
ABC
1.87448 0.33345 0.29891

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.463 0.000
C2 -0.941 -0.717 0.000
O3 1.217 0.381 0.000
H4 -0.509 1.467 0.000
H5 -0.378 -1.660 0.000
H6 -1.602 -0.668 0.884
H7 -1.602 -0.668 -0.884

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.50951.22021.12542.15692.15102.1510
C21.50952.42182.22601.09881.10461.1046
O31.22022.42182.03962.59083.13523.1352
H41.12542.22602.03963.12992.55602.5560
H52.15691.09882.59083.12991.80651.8065
H62.15101.10463.13522.55601.80651.7681
H72.15101.10463.13522.55601.80651.7681

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.587 C1 C2 H6 109.773
C1 C2 H7 109.773 C2 C1 O3 124.714
C2 C1 H4 114.525 O3 C1 H4 120.761
H5 C2 H6 110.143 H5 C2 H7 110.143
H6 C2 H7 106.332
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.259      
2 C -0.434      
3 O -0.352      
4 H 0.071      
5 H 0.155      
6 H 0.150      
7 H 0.150      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.524 -0.357 0.000 2.549
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.271 -0.655 0.000
y -0.655 -17.797 0.000
z 0.000 0.000 -17.631
Traceless
 xyz
x -2.557 -0.655 0.000
y -0.655 1.154 0.000
z 0.000 0.000 1.403
Polar
3z2-r22.806
x2-y2-2.474
xy-0.655
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.573 0.154 0.000
y 0.154 3.858 0.000
z 0.000 0.000 2.659


<r2> (average value of r2) Å2
<r2> 47.198
(<r2>)1/2 6.870