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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: B3LYP/cc-pVTZ

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/cc-pVTZ
 hartrees
Energy at 0K-153.893531
Energy at 298.15K-153.897457
HF Energy-153.893531
Nuclear repulsion energy69.821808
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/cc-pVTZ
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' 3134 3030 9.98 49.32 0.69 0.82
2 A' 3022 2921 2.34 163.84 0.01 0.02
3 A' 2864 2768 130.88 161.15 0.31 0.48
4 A' 1816 1755 178.13 9.40 0.69 0.82
5 A' 1461 1412 20.72 12.71 0.61 0.76
6 A' 1426 1378 9.55 5.62 0.47 0.64
7 A' 1380 1334 25.40 3.81 0.74 0.85
8 A' 1130 1092 25.09 2.11 0.24 0.39
9 A' 886 856 10.17 5.74 0.34 0.51
10 A' 510 493 13.61 1.44 0.45 0.62
11 A" 3073 2971 7.67 65.65 0.75 0.86
12 A" 1470 1421 9.46 7.04 0.75 0.86
13 A" 1138 1100 0.27 1.30 0.75 0.86
14 A" 776 750 0.85 4.29 0.75 0.86
15 A" 161 156 0.74 1.01 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12122.7 cm-1
Scaled (by 0.9666) Zero Point Vibrational Energy (zpe) 11717.8 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/cc-pVTZ
ABC
1.91487 0.33946 0.30447

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.460 0.000
C2 -0.930 -0.718 0.000
O3 1.201 0.386 0.000
H4 -0.499 1.452 0.000
H5 -0.370 -1.651 0.000
H6 -1.582 -0.671 0.876
H7 -1.582 -0.671 -0.876

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.50121.20361.11062.14332.13302.1330
C21.50122.40012.21291.08751.09331.0933
O31.20362.40012.00732.57253.10323.1032
H41.11062.21292.00733.10582.53932.5393
H52.14331.08752.57253.10581.78771.7877
H62.13301.09333.10322.53931.78771.7529
H72.13301.09333.10322.53931.78771.7529

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.766 C1 C2 H6 109.592
C1 C2 H7 109.592 C2 C1 O3 124.722
C2 C1 H4 115.012 O3 C1 H4 120.265
H5 C2 H6 110.114 H5 C2 H7 110.114
H6 C2 H7 106.571
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.155      
2 C -0.260      
3 O -0.252      
4 H 0.042      
5 H 0.111      
6 H 0.102      
7 H 0.102      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.718 -0.317 0.000 2.737
CHELPG        
AIM        
ESP -2.731 -0.319 0.000 2.749


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.049 -0.786 0.000
y -0.786 -18.053 0.000
z 0.000 0.000 -17.951
Traceless
 xyz
x -3.047 -0.786 0.000
y -0.786 1.447 0.000
z 0.000 0.000 1.601
Polar
3z2-r23.201
x2-y2-2.996
xy-0.786
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.941 0.174 0.000
y 0.174 4.290 0.000
z 0.000 0.000 3.160


<r2> (average value of r2) Å2
<r2> 46.828
(<r2>)1/2 6.843