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: MP2=FULL/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2=FULL/6-31G**
 hartrees
Energy at 0K-612.442662
Energy at 298.15K-612.445974
HF Energy-611.833880
Nuclear repulsion energy148.741531
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 MP2=FULL/6-31G**
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' 3279 3064 2.97      
2 A' 3152 2946 0.30      
3 A' 1868 1746 224.10      
4 A' 1525 1425 12.60      
5 A' 1443 1349 22.85      
6 A' 1158 1082 160.29      
7 A' 998 933 57.95      
8 A' 627 586 134.36      
9 A' 455 425 16.97      
10 A' 355 332 0.73      
11 A" 3253 3040 0.33      
12 A" 1529 1429 10.92      
13 A" 1077 1006 2.75      
14 A" 525 491 2.63      
15 A" 145 136 0.09      

Unscaled Zero Point Vibrational Energy (zpe) 10695.0 cm-1
Scaled (by 0.9344) Zero Point Vibrational Energy (zpe) 9993.4 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 MP2=FULL/6-31G**
ABC
0.33679 0.16448 0.11281

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.523 0.000
C2 1.486 0.714 0.000
O3 -0.843 1.376 0.000
Cl4 -0.453 -1.216 0.000
H5 1.703 1.776 0.000
H6 1.912 0.237 0.879
H7 1.912 0.237 -0.879

Atom - Atom Distances (Å)
  C1 C2 O3 Cl4 H5 H6 H7
C11.49781.19971.79702.11432.12392.1239
C21.49782.42112.73531.08451.08671.0867
O31.19972.42112.62192.57693.10823.1082
Cl41.79702.73532.62193.68802.91212.9121
H52.11431.08452.57693.68801.78431.7843
H62.12391.08673.10822.91211.78431.7575
H72.12391.08673.10822.91211.78431.7575

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 108.867 C1 C2 H6 109.494
C1 C2 H7 109.494 C2 C1 O3 127.316
C2 C1 Cl4 111.916 O3 C1 Cl4 120.768
H5 C2 H6 110.523 H5 C2 H7 110.523
H6 C2 H7 107.925
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability