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

using model chemistry: CCSD/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 CCSD/6-31G(2df,p)
 hartrees
Energy at 0K-228.610717
Energy at 298.15K-228.615609
Nuclear repulsion energy 
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 CCSD/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' 3840 3631 61.18      
2 A' 3228 3052 3.64      
3 A' 3111 2941 1.19      
4 A' 1899 1796 279.64      
5 A' 1503 1421 11.86      
6 A' 1452 1373 73.11      
7 A' 1384 1309 14.53      
8 A' 1252 1183 207.39      
9 A' 1024 968 47.93      
10 A' 887 839 2.21      
11 A' 594 562 44.63      
12 A' 421 398 3.65      
13 A" 3187 3013 2.85      
14 A" 1506 1424 7.02      
15 A" 1090 1031 8.07      
16 A" 683 646 95.62      
17 A" 557 527 23.98      
18 A" 95 90 0.27      

Unscaled Zero Point Vibrational Energy (zpe) 13856.6 cm-1
Scaled (by 0.9455) Zero Point Vibrational Energy (zpe) 13101.4 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 CCSD/6-31G(2df,p)
ABC
0.38008 0.31745 0.17871

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.974 -0.999 0.000
C2 0.000 0.145 0.000
O3 0.314 1.312 0.000
H4 1.971 -0.571 0.000
H5 0.831 -1.627 0.882
H6 0.831 -1.627 -0.882
O7 -1.277 -0.263 0.000
H8 -1.774 0.560 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 O7 H8
C11.50292.40381.08491.09241.09242.36813.1596
C21.50291.20832.09732.14752.14751.34071.8218
O32.40381.20832.50883.11233.11232.23892.2191
H41.08492.09732.50881.78671.78673.26243.9122
H51.09242.14753.11231.78671.76492.66143.5144
H61.09242.14753.11231.78671.76492.66143.5144
O72.36811.34072.23893.26242.66142.66140.9619
H83.15961.82182.21913.91223.51443.51440.9619

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 124.547 C1 C2 O7 112.647
C2 C1 H4 107.170 C2 C1 H5 110.679
C2 C1 H6 110.679 C2 O7 H8 103.367
O3 C2 O7 122.806 H4 C1 H5 110.285
H4 C1 H6 110.285 H5 C1 H6 107.763
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability