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

using model chemistry: MP2/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/6-31G(2df,p)
 hartrees
Energy at 0K-228.587956
Energy at 298.15K-228.592821
HF Energy-227.836632
Nuclear repulsion energy121.230032
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 MP2/6-31G(2df,p)
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' 3795 3584 67.79      
2 A' 3257 3076 1.76      
3 A' 3128 2954 0.54      
4 A' 1857 1754 237.51      
5 A' 1498 1415 12.89      
6 A' 1434 1354 75.68      
7 A' 1365 1289 21.40      
8 A' 1223 1155 197.63      
9 A' 1011 955 53.84      
10 A' 882 833 2.74      
11 A' 585 553 41.81      
12 A' 419 396 3.60      
13 A" 3217 3038 0.97      
14 A" 1504 1420 7.92      
15 A" 1078 1018 7.55      
16 A" 686 648 95.20      
17 A" 557 526 20.15      
18 A" 89 84 0.41      

Unscaled Zero Point Vibrational Energy (zpe) 13791.9 cm-1
Scaled (by 0.9445) Zero Point Vibrational Energy (zpe) 13026.5 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 MP2/6-31G(2df,p)
ABC
0.37714 0.31807 0.17823

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.976 -0.994 0.000
C2 0.000 0.145 0.000
O3 0.311 1.320 0.000
H4 1.970 -0.562 0.000
H5 0.836 -1.622 0.881
H6 0.836 -1.622 -0.881
O7 -1.276 -0.276 0.000
H8 -1.777 0.549 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 O7 H8
C11.50012.40721.08371.09111.09112.36353.1554
C21.50011.21482.09302.14462.14461.34391.8220
O32.40721.21482.50843.11553.11552.25092.2258
H41.08372.09302.50841.78491.78493.25843.9078
H51.09112.14463.11551.78491.76202.65483.5093
H61.09112.14463.11551.78491.76202.65483.5093
O72.36351.34392.25093.25842.65482.65480.9650
H83.15541.82202.22583.90783.50933.50930.9650

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 124.579 C1 C2 O7 112.290
C2 C1 H4 107.093 C2 C1 H5 110.729
C2 C1 H6 110.729 C2 O7 H8 102.972
O3 C2 O7 123.131 H4 C1 H5 110.308
H4 C1 H6 110.308 H5 C1 H6 107.697
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability