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: mPW1PW91/aug-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 mPW1PW91/aug-cc-pVDZ
 hartrees
Energy at 0K-229.065189
Energy at 298.15K-229.070004
Nuclear repulsion energy121.246404
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 mPW1PW91/aug-cc-pVDZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3802 3643 66.01      
2 A' 3212 3078 3.80      
3 A' 3082 2953 1.31      
4 A' 1844 1767 345.79      
5 A' 1446 1386 15.06      
6 A' 1408 1349 92.48      
7 A' 1336 1281 14.00      
8 A' 1225 1174 214.71      
9 A' 996 954 48.40      
10 A' 882 846 2.73      
11 A' 587 562 41.12      
12 A' 421 404 4.69      
13 A" 3160 3028 2.87      
14 A" 1452 1392 8.85      
15 A" 1055 1011 7.95      
16 A" 673 645 95.06      
17 A" 555 532 20.22      
18 A" 63 61 0.22      

Unscaled Zero Point Vibrational Energy (zpe) 13599.0 cm-1
Scaled (by 0.9583) Zero Point Vibrational Energy (zpe) 13031.9 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 mPW1PW91/aug-cc-pVDZ
ABC
0.37975 0.31667 0.17843

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/aug-cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.062 -0.904 0.000
C2 0.000 0.152 0.000
O3 0.184 1.345 0.000
H4 2.046 -0.432 0.000
H5 0.948 -1.544 0.883
H6 0.948 -1.544 -0.883
O7 -1.241 -0.385 0.000
H8 -1.860 0.358 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 O7 H8
C11.49752.41411.09131.09651.09652.36063.1833
C21.49751.20722.12722.13372.13371.35181.8716
O32.41411.20722.57303.11553.11552.24092.2698
H41.09132.12722.57301.79511.79513.28683.9849
H51.09652.13373.11551.79511.76682.62933.5047
H61.09652.13373.11551.79511.76682.62933.5047
O72.36061.35182.24093.28682.62932.62930.9675
H83.18331.87162.26983.98493.50473.50470.9675

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 126.058 C1 C2 O7 111.786
C2 C1 H4 109.507 C2 C1 H5 109.712
C2 C1 H6 109.712 C2 O7 H8 106.428
O3 C2 O7 122.156 H4 C1 H5 110.268
H4 C1 H6 110.268 H5 C1 H6 107.347
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/aug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.299      
2 C 0.623      
3 O -0.548      
4 H -0.062      
5 H -0.009      
6 H -0.009      
7 O -0.456      
8 H 0.162      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.273 -1.798 0.000 1.819
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.197 -3.733 0.000
y -3.733 -27.465 0.000
z 0.000 0.000 -23.186
Traceless
 xyz
x 5.129 -3.733 0.000
y -3.733 -5.774 0.000
z 0.000 0.000 0.645
Polar
3z2-r21.290
x2-y27.268
xy-3.733
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.493 -0.153 0.000
y -0.153 5.677 0.000
z 0.000 0.000 3.874


<r2> (average value of r2) Å2
<r2> 70.881
(<r2>)1/2 8.419