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Experimental data for CH3COOCH3 (methyl acetate)

22 02 02 11 45
Other names
Acetate de methyle; Acetic acid, methyl ester; Devoton; Ethyl ester of monoacetic acid; Methyl acetate; Methyl acetic ester; Methyl ester of acetic acid; Methyl ethanoate; Methylacetaat; Methylacetat; Methyle (acetate de); Methylester kiseliny octove; Metile; Metile (acetato di); Octan metylu; Tereton;
INChI INChIKey SMILES IUPAC name
InChI=1S/C3H6O2/c1-3(4)5-2/h1-2H3 KXKVLQRXCPHEJC-UHFFFAOYSA-N CC(OC)=O Methyl acetate
State Conformation
1A' CS
Enthalpy of formation (Hfg), Entropy, Integrated heat capacity (0 K to 298.15 K) (HH), Heat Capacity (Cp)
Property Value Uncertainty units Reference Comment
Hfg(298.15K) enthalpy of formation -408.80   kJ mol-1 TRC
Hfg(0K) enthalpy of formation     kJ mol-1 TRC
Entropy (298.15K) entropy 321.20   J K-1 mol-1 TRC
Integrated Heat Capacity (0 to 298.15K) integrated heat capacity     kJ mol-1  
Heat Capacity (298.15K) heat capacity 86.03   J K-1 mol-1 webbook
Information can also be found for this species in the NIST Chemistry Webbook
Vibrational levels (cm-1) vibrations
Mode Number Symmetry Frequency Intensity Comment Description
Fundamental(cm-1) Harmonic(cm-1) Reference (km mol-1) unc. Reference
1 A' 3035   Shim      
2 A' 3031   Shim      
3 A' 2966   Shim      
4 A' 2964   Shim      
5 A' 1771   Shim      
6 A' 1460   Shim      
7 A' 1440   Shim      
8 A' 1430   Shim      
9 A' 1375   Shim      
10 A' 1248   Shim      
11 A' 1159   Shim      
12 A' 1060   Shim      
13 A' 980   Shim      
14 A' 844   Shim      
15 A' 639   Shim      
16 A' 429   Shim      
17 A' 303   Shim      
18 A" 3005   Shim      
19 A" 2994   Shim      
20 A" 1460   Shim      
21 A" 1430   Shim      
22 A" 1187   Shim      
23 A" 1036   Shim      
24 A" 607   Shim      
25 A" 187   Shim      
26 A" 136   Shim      
27 A" 110   Shim      

vibrational zero-point energy: 19143.0 cm-1 (from fundamental vibrations)
Calculated vibrational frequencies for CH3COOCH3 (methyl acetate).
Gas-phase IR spectra can be found in the NIST Chemistry Webbook here.
Rotational Constants (cm-1) rotational constants
See section I.F.4 to change rotational constant units
A B C reference comment

Calculated rotational constants for CH3COOCH3 (methyl acetate).
Product of moments of inertia moments of inertia
amu3Å6   0gm3 cm6
Geometric Data
picture of methyl acetate

Point Group Cs


Internal coordinates
distances (r) in Å, angles (a) in degrees, dihedrals (d) in degrees
Description Value unc. Connectivity Reference Comment
Atom 1 Atom 2 Atom 3 Atom 4

Cartesians
Atom x (Å) y (Å) z (Å)

Atom - Atom Distances bond lengths
Distances in Å
 

Calculated geometries for CH3COOCH3 (methyl acetate).

Bond descriptions


Examples: C-C single bond, C=C, double bond, C#C triple bond, C:C aromatic bond
Bond Type Count
H-C 6
C-C 1
C-O 2
C=O 1

Connectivity
Atom 1 Atom 2
C1 C2
C1 H6
C1 H7
C1 H8
C2 O3
C2 O4
O4 C5
C5 H9
C5 H10
C5 H11
Electronic energy levels (cm-1)
Energy (cm-1) Degeneracy reference description
0 1   1A'

Ionization Energies (eV)
Ionization Energy I.E. unc. vertical I.E. v.I.E. unc. reference
10.250 0.020 10.500   webbook
Dipole, Quadrupole and Polarizability
Electric dipole moment dipole
State Config State description Conf description Exp. min. Dipole (Debye) Reference comment Point Group Components
x y z total dipole quadrupole
1 1 1A' Cs True       1.720 NSRDS-NBS10 DT Cs 2 3
Experimental dipole measurement abbreviations: MW microwave; DT Dielectric with Temperature variation; DR Indirect (usually an upper limit); MB Molecular beam
Calculated electric dipole moments for CH3COOCH3 (methyl acetate).
Electric quadrupole moment quadrupole
State Config State description Conf description Exp. min. Quadrupole (D Å) Reference comment Point Group Components
xx yy zz dipole quadrupole
1 1 1A' Cs True       Cs 2 3

Calculated electric quadrupole moments for CH3COOCH3 (methyl acetate).
Electric dipole polarizability (Å3) polarizability
alpha unc. Reference
6.811   1998Gus/Rui:163

Calculated electric dipole polarizability for CH3COOCH3 (methyl acetate).

References
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squib reference DOI
1998Gus/Rui:163 M Gussoni, R Rui, G Zerbi "Electronic and relaxation contribution to linear molecular polarizability. An analysis of the experimental values" J. Mol. Struct. 447 (1998) 163-215 10.1016/S0022-2860(97)00292-5
NSRDS-NBS10 R. D. Nelson Jr., D. R. Lide, A. A. Maryott "Selected Values of electric dipole moments for molecules in the gas phase" NSRDS-NBS10, 1967 10.6028/NBS.NSRDS.10
Shim Shimanouchi, T. , Tables of Molecular Vibrational Frequencies, Consolidated Volu 10.6028/NBS.NSRDS.39
TRC Frenkel, M; Marsh, K.N.; Wilhoit, R.C.; Kabo, G.J.; Roganov, G.N.,Thermodynamics of Organic Compounds in the Gas State,Thermodynamics Research Center, College Station, TX, 1994  
webbook NIST Chemistry Webbook (http://webbook.nist.gov/chemistry) 10.18434/T4D303

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