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All results from a given calculation for CH3COOH (Acetic acid)

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-228.433979
Energy at 298.15K-228.438858
HF Energy-227.807062
Nuclear repulsion energy120.692265
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' 3696 3483 64.45      
2 A' 3257 3069 3.04      
3 A' 3132 2951 0.94      
4 A' 1862 1754 235.84      
5 A' 1537 1449 14.21      
6 A' 1469 1385 68.32      
7 A' 1388 1308 38.73      
8 A' 1240 1168 204.55      
9 A' 1035 976 64.38      
10 A' 888 837 3.24      
11 A' 586 552 44.49      
12 A' 428 403 4.44      
13 A" 3218 3032 2.28      
14 A" 1539 1450 9.74      
15 A" 1104 1040 7.64      
16 A" 695 655 123.06      
17 A" 558 526 20.33      
18 A" 92 86 0.57      

Unscaled Zero Point Vibrational Energy (zpe) 13862.1 cm-1
Scaled (by 0.9422) Zero Point Vibrational Energy (zpe) 13060.9 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 MP2=FULL/6-31G*
ABC
0.37342 0.31622 0.17685

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 0.999 -0.975 0.000
C2 0.000 0.145 0.000
O3 0.282 1.335 0.000
H4 1.985 -0.520 0.000
H5 0.874 -1.607 0.883
H6 0.874 -1.607 -0.883
O7 -1.273 -0.309 0.000
H8 -1.807 0.508 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 O7 H8
C11.50062.41851.08561.09321.09322.36743.1734
C21.50061.22332.09312.14782.14781.35101.8426
O32.41851.22332.51773.12843.12842.26272.2465
H41.08562.09312.51771.78771.78773.26423.9282
H51.09322.14783.12841.78771.76552.65973.5270
H61.09322.14783.12841.78771.76552.65973.5270
O72.36741.35102.26273.26422.65972.65970.9759
H83.17341.84262.24653.92823.52703.52700.9759

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 124.910 C1 C2 O7 112.135
C2 C1 H4 106.965 C2 C1 H5 110.824
C2 C1 H6 110.824 C2 O7 H8 103.553
O3 C2 O7 122.956 H4 C1 H5 110.268
H4 C1 H6 110.268 H5 C1 H6 107.713
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability