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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: B1B95/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 B1B95/cc-pVDZ
 hartrees
Energy at 0K-153.768379
Energy at 298.15K-153.772311
HF Energy-153.768379
Nuclear repulsion energy69.790802
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 B1B95/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' 3195 3071 6.01 56.25 0.73 0.84
2 A' 3061 2943 1.54 148.09 0.01 0.02
3 A' 2899 2787 137.93 157.17 0.33 0.49
4 A' 1870 1797 181.17 8.40 0.69 0.82
5 A' 1432 1377 19.29 20.93 0.63 0.78
6 A' 1416 1361 14.61 4.88 0.68 0.81
7 A' 1353 1301 22.35 4.99 0.75 0.86
8 A' 1127 1084 24.46 2.57 0.27 0.43
9 A' 902 867 5.61 5.42 0.42 0.59
10 A' 503 483 13.41 1.26 0.50 0.67
11 A" 3140 3018 4.55 73.77 0.75 0.86
12 A" 1443 1387 10.44 11.74 0.75 0.86
13 A" 1127 1083 1.11 1.80 0.75 0.86
14 A" 770 740 1.00 5.28 0.75 0.86
15 A" 172 166 0.18 1.06 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12205.0 cm-1
Scaled (by 0.9612) Zero Point Vibrational Energy (zpe) 11731.4 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 B1B95/cc-pVDZ
ABC
1.90041 0.34063 0.30525

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.460 0.000
C2 -0.929 -0.714 0.000
O3 1.201 0.381 0.000
H4 -0.504 1.459 0.000
H5 -0.362 -1.651 0.000
H6 -1.585 -0.667 0.882
H7 -1.585 -0.667 -0.882

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.49661.20361.11942.14112.13492.1349
C21.49662.39502.21411.09501.10001.1000
O31.20362.39502.01712.56373.10433.1043
H41.11942.21412.01713.11312.54282.5428
H52.14111.09502.56373.11311.80011.8001
H62.13491.10003.10432.54281.80011.7637
H72.13491.10003.10432.54281.80011.7637

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.462 C1 C2 H6 109.668
C1 C2 H7 109.668 C2 C1 O3 124.635
C2 C1 H4 114.878 O3 C1 H4 120.487
H5 C2 H6 110.190 H5 C2 H7 110.190
H6 C2 H7 106.585
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.107      
2 C -0.077      
3 O -0.200      
4 H -0.005      
5 H 0.056      
6 H 0.060      
7 H 0.060      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.549 -0.309 0.000 2.568
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.333 -0.769 0.000
y -0.769 -17.804 0.000
z 0.000 0.000 -17.584
Traceless
 xyz
x -2.638 -0.769 0.000
y -0.769 1.154 0.000
z 0.000 0.000 1.484
Polar
3z2-r22.969
x2-y2-2.528
xy-0.769
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.451 0.129 0.000
y 0.129 3.873 0.000
z 0.000 0.000 2.692


<r2> (average value of r2) Å2
<r2> 46.512
(<r2>)1/2 6.820