return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: HSEh1PBE/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at HSEh1PBE/STO-3G
 hartrees
Energy at 0K-151.677094
Energy at 298.15K-151.680891
HF Energy-151.677094
Nuclear repulsion energy68.035433
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 HSEh1PBE/STO-3G
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' 3544 3130 0.47 24.76 0.75 0.86
2 A' 3346 2955 1.42 45.19 0.01 0.02
3 A' 3226 2849 38.12 45.26 0.35 0.52
4 A' 1901 1679 30.65 2.80 0.05 0.10
5 A' 1668 1473 8.94 18.16 0.73 0.84
6 A' 1545 1364 11.38 7.12 0.72 0.84
7 A' 1498 1322 7.62 9.49 0.73 0.85
8 A' 1188 1049 25.51 4.91 0.58 0.74
9 A' 966 853 6.07 4.13 0.33 0.49
10 A' 503 444 5.49 1.19 0.58 0.74
11 A" 3510 3100 0.16 32.87 0.75 0.86
12 A" 1668 1473 6.46 13.74 0.75 0.86
13 A" 1161 1025 1.39 0.11 0.75 0.86
14 A" 810 716 4.24 2.86 0.75 0.86
15 A" 156 138 0.23 0.48 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 13344.5 cm-1
Scaled (by 0.8831) Zero Point Vibrational Energy (zpe) 11784.6 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 HSEh1PBE/STO-3G
ABC
1.84024 0.32001 0.28739

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/STO-3G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.475 0.000
C2 -0.963 -0.733 0.000
O3 1.242 0.394 0.000
H4 -0.534 1.465 0.000
H5 -0.404 -1.677 0.000
H6 -1.610 -0.693 0.889
H7 -1.610 -0.693 -0.889

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.54541.24491.12442.18962.17842.1784
C21.54542.47682.23971.09681.09961.0996
O31.24492.47682.07402.64543.17883.1788
H41.12442.23972.07403.14442.56972.5697
H52.18961.09682.64543.14441.79211.7921
H62.17841.09963.17882.56971.79211.7772
H72.17841.09963.17882.56971.79211.7772

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.788 C1 C2 H6 109.737
C1 C2 H7 109.737 C2 C1 O3 124.810
C2 C1 H4 113.103 O3 C1 H4 122.087
H5 C2 H6 109.354 H5 C2 H7 109.354
H6 C2 H7 107.816
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.088      
2 C -0.257      
3 O -0.169      
4 H 0.061      
5 H 0.093      
6 H 0.092      
7 H 0.092      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.658 -0.144 0.000 1.664
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.482 -0.552 0.000
y -0.552 -16.498 0.000
z 0.000 0.000 -16.355
Traceless
 xyz
x -2.056 -0.552 0.000
y -0.552 0.921 0.000
z 0.000 0.000 1.135
Polar
3z2-r22.270
x2-y2-1.984
xy-0.552
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.483 0.093 0.000
y 0.093 1.756 0.000
z 0.000 0.000 1.162


<r2> (average value of r2) Å2
<r2> 47.550
(<r2>)1/2 6.896