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 CH3COOH (Acetic acid)

using model chemistry: wB97X-D/aug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at wB97X-D/aug-cc-pVTZ
 hartrees
Energy at 0K-229.107657
Energy at 298.15K 
HF Energy-229.107657
Nuclear repulsion energy121.625434
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 wB97X-D/aug-cc-pVTZ
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' 3823 3657 65.13      
2 A' 3199 3060 4.14      
3 A' 3082 2948 1.47      
4 A' 1854 1773 364.18      
5 A' 1472 1408 14.44      
6 A' 1419 1357 79.11      
7 A' 1352 1293 30.57      
8 A' 1227 1174 212.85      
9 A' 1015 971 59.46      
10 A' 876 838 3.37      
11 A' 594 569 39.68      
12 A' 431 412 4.54      
13 A" 3152 3015 3.14      
14 A" 1476 1412 9.16      
15 A" 1064 1018 8.47      
16 A" 666 637 91.70      
17 A" 542 518 24.39      
18 A" 130i 125i 0.15      

Unscaled Zero Point Vibrational Energy (zpe) 13556.5 cm-1
Scaled (by 0.9566) Zero Point Vibrational Energy (zpe) 12968.2 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 wB97X-D/aug-cc-pVTZ
ABC
0.38263 0.31765 0.17930

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/aug-cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.994 -0.979 0.000
C2 0.000 0.141 0.000
O3 0.287 1.313 0.000
H4 1.983 -0.538 0.000
H5 0.861 -1.607 0.881
H6 0.861 -1.607 -0.881
O7 -1.271 -0.282 0.000
H8 -1.799 0.523 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 O7 H8
C11.49732.39871.08261.09011.09012.36993.1712
C21.49731.20712.09612.13822.13821.33941.8391
O32.39871.20712.51083.10373.10372.22982.2308
H41.08262.09612.51081.78251.78253.26413.9281
H51.09012.13823.10371.78251.76182.66023.5196
H61.09012.13823.10371.78251.76182.66023.5196
O72.36991.33942.22983.26412.66022.66020.9626
H83.17121.83912.23083.92813.51963.51960.9626

picture of Acetic acid state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 O3 124.637 C1 C2 O7 113.208
C2 C1 H4 107.591 C2 C1 H5 110.473
C2 C1 H6 110.473 C2 O7 H8 104.870
O3 C2 O7 122.156 H4 C1 H5 110.250
H4 C1 H6 110.250 H5 C1 H6 107.818
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.523      
2 C 0.524      
3 O -0.651      
4 H 0.265      
5 H 0.265      
6 H 0.265      
7 O -0.324      
8 H 0.179      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.333 -1.781 0.000 1.812
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.124 -3.790 0.000
y -3.790 -27.259 0.000
z 0.000 0.000 -23.079
Traceless
 xyz
x 5.045 -3.790 0.000
y -3.790 -5.658 0.000
z 0.000 0.000 0.613
Polar
3z2-r21.226
x2-y27.135
xy-3.790
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.481 -0.133 0.000
y -0.133 5.661 0.000
z 0.000 0.000 3.929


<r2> (average value of r2) Å2
<r2> 70.525
(<r2>)1/2 8.398