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: QCISD/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 QCISD/cc-pVTZ
 hartrees
Energy at 0K-228.721523
Energy at 298.15K-228.726391
HF Energy-227.902845
Nuclear repulsion energy121.401727
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 QCISD/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' 3821 3651 65.21      
2 A' 3196 3054 4.74      
3 A' 3082 2945 2.14      
4 A' 1863 1780 297.78      
5 A' 1494 1428 12.71      
6 A' 1441 1377 73.51      
7 A' 1371 1310 20.16      
8 A' 1238 1183 207.37      
9 A' 1019 974 55.67      
10 A' 882 842 2.80      
11 A' 593 567 42.87      
12 A' 424 405 3.68      
13 A" 3153 3012 4.54      
14 A" 1501 1434 7.52      
15 A" 1086 1037 6.50      
16 A" 670 640 91.97      
17 A" 553 528 27.57      
18 A" 82 78 0.23      

Unscaled Zero Point Vibrational Energy (zpe) 13733.7 cm-1
Scaled (by 0.9555) Zero Point Vibrational Energy (zpe) 13122.6 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 QCISD/cc-pVTZ
ABC
0.38002 0.31725 0.17861

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.986 -0.987 0.000
C2 0.000 0.143 0.000
O3 0.300 1.316 0.000
H4 1.976 -0.550 0.000
H5 0.850 -1.615 0.881
H6 0.850 -1.615 -0.881
O7 -1.276 -0.277 0.000
H8 -1.786 0.539 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 O7 H8
C11.50012.40321.08241.09001.09002.37063.1644
C21.50011.21032.09462.14192.14191.34301.8292
O32.40321.21032.50893.10893.10892.24022.2255
H41.08242.09462.50891.78261.78263.26353.9169
H51.09002.14193.10891.78261.76212.66123.5157
H61.09002.14193.10891.78261.76212.66123.5157
O72.37061.34302.24023.26352.66122.66120.9624
H83.16441.82922.22553.91693.51573.51570.9624

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 124.567 C1 C2 O7 112.867
C2 C1 H4 107.295 C2 C1 H5 110.571
C2 C1 H6 110.571 C2 O7 H8 103.791
O3 C2 O7 122.566 H4 C1 H5 110.283
H4 C1 H6 110.283 H5 C1 H6 107.857
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability