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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: HF/cc-pVDZ

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/cc-pVDZ
 hartrees
Energy at 0K-152.929340
Energy at 298.15K-152.933385
HF Energy-152.929340
Nuclear repulsion energy70.275505
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/cc-pVDZ
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' 3303 2999 13.81 57.49 0.72 0.84
2 A' 3182 2889 6.43 154.20 0.01 0.02
3 A' 3101 2815 120.97 123.69 0.39 0.56
4 A' 2023 1837 244.73 10.56 0.68 0.81
5 A' 1558 1415 19.48 16.52 0.69 0.82
6 A' 1534 1393 18.74 4.83 0.40 0.58
7 A' 1490 1353 9.39 3.09 0.73 0.84
8 A' 1217 1105 27.18 2.91 0.28 0.44
9 A' 960 872 4.13 7.10 0.30 0.46
10 A' 544 494 19.93 1.16 0.47 0.64
11 A" 3250 2951 15.83 76.49 0.75 0.86
12 A" 1571 1427 9.62 10.86 0.75 0.86
13 A" 1246 1131 1.12 1.14 0.75 0.86
14 A" 845 767 0.12 4.69 0.75 0.86
15 A" 176 160 1.55 0.93 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12999.2 cm-1
Scaled (by 0.908) Zero Point Vibrational Energy (zpe) 11803.3 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 HF/cc-pVDZ
ABC
1.92570 0.34384 0.30841

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.462 0.000
C2 -0.916 -0.728 0.000
O3 1.184 0.398 0.000
H4 -0.507 1.444 0.000
H5 -0.339 -1.651 0.000
H6 -1.564 -0.691 0.880
H7 -1.564 -0.691 -0.880

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.50191.18561.10562.13962.13272.1327
C21.50192.38322.21081.08851.09311.0931
O31.18562.38321.98822.55293.08383.0838
H41.10562.21081.98823.09972.53992.5399
H52.13961.08852.55293.09971.78771.7877
H62.13271.09313.08382.53991.78771.7603
H72.13271.09313.08382.53991.78771.7603

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.353 C1 C2 H6 109.530
C1 C2 H7 109.530 C2 C1 O3 124.527
C2 C1 H4 115.114 O3 C1 H4 120.359
H5 C2 H6 110.059 H5 C2 H7 110.059
H6 C2 H7 107.253
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.203      
2 C -0.086      
3 O -0.296      
4 H 0.007      
5 H 0.061      
6 H 0.055      
7 H 0.055      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.889 -0.245 0.000 2.899
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.094 -1.082 0.000
y -1.082 -17.839 0.000
z 0.000 0.000 -17.753
Traceless
 xyz
x -3.299 -1.082 0.000
y -1.082 1.585 0.000
z 0.000 0.000 1.714
Polar
3z2-r23.427
x2-y2-3.256
xy-1.082
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.205 0.075 0.000
y 0.075 3.525 0.000
z 0.000 0.000 2.616


<r2> (average value of r2) Å2
<r2> 46.359
(<r2>)1/2 6.809