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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: HF/LANL2DZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at HF/LANL2DZ
 hartrees
Energy at 0K-152.869194
Energy at 298.15K-152.873225
HF Energy-152.869194
Nuclear repulsion energy69.600588
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 HF/LANL2DZ
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' 3340 3006 26.87 45.01 0.72 0.84
2 A' 3232 2909 86.12 156.80 0.16 0.27
3 A' 3203 2883 18.66 117.16 0.09 0.16
4 A' 1891 1702 192.69 12.19 0.34 0.51
5 A' 1617 1455 30.74 18.72 0.72 0.84
6 A' 1561 1405 24.25 2.86 0.57 0.73
7 A' 1538 1384 10.23 9.37 0.66 0.79
8 A' 1250 1125 28.31 7.01 0.48 0.65
9 A' 987 888 2.13 9.00 0.26 0.41
10 A' 539 485 22.47 1.84 0.53 0.69
11 A" 3281 2953 28.50 65.14 0.75 0.86
12 A" 1626 1464 18.77 13.10 0.75 0.86
13 A" 1262 1135 0.49 0.43 0.75 0.86
14 A" 878 790 1.74 6.56 0.75 0.86
15 A" 163 146 2.94 0.79 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 13184.4 cm-1
Scaled (by 0.8999) Zero Point Vibrational Energy (zpe) 11864.7 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 HF/LANL2DZ
ABC
1.90988 0.33675 0.30209

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/LANL2DZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.466 0.000
C2 -0.948 -0.702 0.000
O3 1.216 0.364 0.000
H4 -0.458 1.453 0.000
H5 -0.405 -1.636 0.000
H6 -1.588 -0.656 0.874
H7 -1.588 -0.656 -0.874

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.50421.22011.08782.14032.13212.1321
C21.50422.41212.20981.07971.08511.0851
O31.22012.41211.99652.57443.10953.1095
H41.08782.20981.99653.08882.54722.5472
H52.14031.07972.57443.08881.76781.7678
H62.13211.08513.10952.54721.76781.7490
H72.13211.08513.10952.54721.76781.7490

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.784 C1 C2 H6 109.805
C1 C2 H7 109.805 C2 C1 O3 124.275
C2 C1 H4 116.049 O3 C1 H4 119.676
H5 C2 H6 109.492 H5 C2 H7 109.492
H6 C2 H7 107.397
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/LANL2DZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.182      
2 C -0.590      
3 O -0.352      
4 H 0.147      
5 H 0.220      
6 H 0.196      
7 H 0.196      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -3.624 -0.117 0.000 3.626
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.472 -1.145 0.000
y -1.145 -17.572 0.000
z 0.000 0.000 -18.043
Traceless
 xyz
x -4.664 -1.145 0.000
y -1.145 2.685 0.000
z 0.000 0.000 1.979
Polar
3z2-r23.958
x2-y2-4.899
xy-1.145
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.281 0.024 0.000
y 0.024 2.993 0.000
z 0.000 0.000 2.388


<r2> (average value of r2) Å2
<r2> 47.225
(<r2>)1/2 6.872