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 CH3COCl (Acetyl Chloride)

using model chemistry: HF/CEP-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at HF/CEP-31G
 hartrees
Energy at 0K-43.008446
Energy at 298.15K-43.011837
Nuclear repulsion energy59.413821
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 HF/CEP-31G
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' 3370 3037 16.41      
2 A' 3251 2931 8.33      
3 A' 1920 1731 427.96      
4 A' 1607 1448 22.82      
5 A' 1559 1405 17.03      
6 A' 1237 1115 165.86      
7 A' 1054 950 86.38      
8 A' 624 563 181.13      
9 A' 468 422 12.39      
10 A' 352 317 1.42      
11 A" 3347 3017 15.38      
12 A" 1607 1448 19.83      
13 A" 1177 1061 5.95      
14 A" 544 490 8.66      
15 A" 161 145 0.01      

Unscaled Zero Point Vibrational Energy (zpe) 11138.1 cm-1
Scaled (by 0.9014) Zero Point Vibrational Energy (zpe) 10039.9 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 HF/CEP-31G
ABC
0.33124 0.15688 0.10860

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.279 0.000
C2 1.428 -0.235 0.000
O3 -0.375 1.420 0.000
Cl4 -1.251 -1.087 0.000
H5 2.102 0.614 0.000
H6 1.594 -0.850 0.880
H7 1.594 -0.850 -0.880

Atom - Atom Distances (Å)
  C1 C2 O3 Cl4 H5 H6 H7
C11.51811.20011.85232.12902.14292.1429
C21.51812.44732.81091.08481.08661.0866
O31.20012.44732.65522.60483.13093.1309
Cl41.85232.81092.65523.76002.98712.9871
H52.12901.08482.60483.76001.78291.7829
H62.14291.08663.13092.98711.78291.7609
H72.14291.08663.13092.98711.78291.7609

picture of Acetyl Chloride state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 108.613 C1 C2 H6 109.600
C1 C2 H7 109.600 C2 C1 O3 128.018
C2 C1 Cl4 112.645 O3 C1 Cl4 119.337
H5 C2 H6 110.386 H5 C2 H7 110.386
H6 C2 H7 108.246
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.089      
2 C -0.181      
3 O -0.110      
4 Cl -0.091      
5 H 0.160      
6 H 0.155      
7 H 0.155      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  3.594 -1.366 0.000 3.845
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.025 -0.386 0.000
y -0.386 -35.439 0.000
z 0.000 0.000 -29.080
Traceless
 xyz
x 2.235 -0.386 0.000
y -0.386 -5.886 0.000
z 0.000 0.000 3.651
Polar
3z2-r27.303
x2-y25.414
xy-0.386
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.967 1.152 0.000
y 1.152 5.880 0.000
z 0.000 0.000 2.451


<r2> (average value of r2) Å2
<r2> 73.404
(<r2>)1/2 8.568