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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: BLYP/aug-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 BLYP/aug-cc-pVDZ
 hartrees
Energy at 0K-153.798815
Energy at 298.15K-153.802668
HF Energy-153.798815
Nuclear repulsion energy68.882616
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 BLYP/aug-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' 3065 3060 10.77 48.40 0.69 0.82
2 A' 2946 2941 2.84 207.46 0.01 0.02
3 A' 2775 2770 140.50 198.56 0.31 0.47
4 A' 1715 1712 180.51 13.36 0.58 0.74
5 A' 1390 1387 21.70 12.01 0.52 0.69
6 A' 1367 1365 7.29 2.84 0.43 0.60
7 A' 1310 1307 26.64 3.43 0.74 0.85
8 A' 1084 1082 23.76 2.95 0.19 0.32
9 A' 855 853 10.31 6.87 0.43 0.60
10 A' 490 489 11.55 1.39 0.32 0.48
11 A" 3002 2996 7.21 67.58 0.75 0.86
12 A" 1399 1397 9.35 4.40 0.75 0.86
13 A" 1078 1076 0.00 1.81 0.75 0.86
14 A" 738 736 1.21 4.15 0.75 0.86
15 A" 155 155 0.88 1.57 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 11684.2 cm-1
Scaled (by 0.9981) Zero Point Vibrational Energy (zpe) 11662.0 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 BLYP/aug-cc-pVDZ
ABC
1.86268 0.33106 0.29683

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.464 0.000
C2 -0.945 -0.720 0.000
O3 1.221 0.382 0.000
H4 -0.498 1.475 0.000
H5 -0.388 -1.672 0.000
H6 -1.607 -0.662 0.888
H7 -1.607 -0.662 -0.888

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.51511.22401.12722.17112.15362.1536
C21.51512.43082.24041.10291.10881.1088
O31.22402.43082.03742.60973.14263.1426
H41.12722.24042.03743.14922.56612.5661
H52.17111.10292.60973.14921.81471.8147
H62.15361.10883.14262.56611.81471.7758
H72.15361.10883.14262.56611.81471.7758

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 111.071 C1 C2 H6 109.345
C1 C2 H7 109.345 C2 C1 O3 124.765
C2 C1 H4 115.178 O3 C1 H4 120.057
H5 C2 H6 110.275 H5 C2 H7 110.275
H6 C2 H7 106.413
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/aug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.780      
2 C 0.770      
3 O -0.404      
4 H -0.353      
5 H -0.306      
6 H -0.244      
7 H -0.244      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.799 -0.351 0.000 2.821
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.730 -0.708 0.000
y -0.708 -18.452 0.000
z 0.000 0.000 -18.294
Traceless
 xyz
x -3.357 -0.708 0.000
y -0.708 1.560 0.000
z 0.000 0.000 1.797
Polar
3z2-r23.594
x2-y2-3.278
xy-0.708
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.898 0.248 0.000
y 0.248 5.064 0.000
z 0.000 0.000 3.741


<r2> (average value of r2) Å2
<r2> 48.025
(<r2>)1/2 6.930