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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: B2PLYP/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 B2PLYP/cc-pVDZ
 hartrees
Energy at 0K-153.681953
Energy at 298.15K-153.685888
HF Energy-153.529621
Nuclear repulsion energy69.385572
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 B2PLYP/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' 3184 3050 7.84 55.62 0.73 0.84
2 A' 3056 2927 2.61 144.17 0.01 0.02
3 A' 2900 2778 144.98 161.42 0.32 0.49
4 A' 1814 1737 150.16 7.09 0.71 0.83
5 A' 1448 1387 18.33 19.93 0.66 0.80
6 A' 1422 1362 11.98 7.30 0.55 0.71
7 A' 1370 1312 17.87 4.60 0.75 0.86
8 A' 1131 1083 23.25 2.63 0.27 0.42
9 A' 898 860 6.52 6.08 0.41 0.58
10 A' 504 483 13.10 1.46 0.49 0.66
11 A" 3131 2998 7.18 73.35 0.75 0.86
12 A" 1462 1400 9.51 12.19 0.75 0.86
13 A" 1131 1083 0.69 1.61 0.75 0.86
14 A" 777 744 0.54 5.59 0.75 0.86
15 A" 171 163 0.26 1.12 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12199.8 cm-1
Scaled (by 0.9577) Zero Point Vibrational Energy (zpe) 11683.7 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 B2PLYP/cc-pVDZ
ABC
1.88478 0.33604 0.30130

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.462 0.000
C2 -0.936 -0.718 0.000
O3 1.210 0.384 0.000
H4 -0.509 1.461 0.000
H5 -0.368 -1.658 0.000
H6 -1.592 -0.670 0.885
H7 -1.592 -0.670 -0.885

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.50681.21221.12112.15182.14492.1449
C21.50682.41242.22111.09781.10261.1026
O31.21222.41242.02832.58033.12143.1214
H41.12112.22112.02833.12222.54962.5496
H52.15181.09782.58033.12221.80431.8043
H62.14491.10263.12142.54961.80431.7706
H72.14491.10263.12142.54961.80431.7706

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.430 C1 C2 H6 109.592
C1 C2 H7 109.592 C2 C1 O3 124.700
C2 C1 H4 114.596 O3 C1 H4 120.705
H5 C2 H6 110.168 H5 C2 H7 110.168
H6 C2 H7 106.821
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.113      
2 C -0.068      
3 O -0.193      
4 H -0.009      
5 H 0.050      
6 H 0.053      
7 H 0.053      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.475 -0.274 0.000 2.490
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.630 -0.803 0.012
y -0.803 -18.126 0.004
z 0.012 0.004 -17.800
Traceless
 xyz
x -2.667 -0.803 0.012
y -0.803 1.089 0.004
z 0.012 0.004 1.578
Polar
3z2-r23.155
x2-y2-2.504
xy-0.803
xz0.012
yz0.004


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.477 0.107 -0.002
y 0.107 3.873 -0.000
z -0.002 -0.000 2.698


<r2> (average value of r2) Å2
<r2> 47.109
(<r2>)1/2 6.864