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All results from a given calculation for CH3COOCH3 (methyl acetate)

using model chemistry: G4

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at G4
 hartrees
Energy at 0K-268.246173
Energy at 298.15K-268.238947
HF Energy-268.410706
Nuclear repulsion energy181.505288
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 B3LYP/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' 3170 3059 6.93      
2 A' 3157 3047 16.03      
3 A' 3058 2951 3.35      
4 A' 3051 2944 26.53      
5 A' 1828 1764 215.53      
6 A' 1498 1446 6.77      
7 A' 1475 1423 18.67      
8 A' 1469 1417 9.22      
9 A' 1393 1344 42.09      
10 A' 1273 1228 318.79      
11 A' 1211 1168 1.49      
12 A' 1079 1041 69.23      
13 A' 986 951 1.29      
14 A' 860 830 15.74      
15 A' 644 622 5.57      
16 A' 419 405 6.35      
17 A' 282 272 11.14      
18 A" 3124 3015 21.49      
19 A" 3122 3013 4.36      
20 A" 1482 1430 7.07      
21 A" 1476 1424 5.01      
22 A" 1179 1138 1.28      
23 A" 1065 1028 7.03      
24 A" 609 587 5.27      
25 A" 179 173 5.73      
26 A" 118 114 0.21      
27 A" 47 46 0.32      

Unscaled Zero Point Vibrational Energy (zpe) 19625.9 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 18939.0 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 B3LYP/6-31G(2df,p)
ABC
0.34036 0.13904 0.10249

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.138 1.485 0.000
C2 0.000 0.493 0.000
O3 -1.174 0.765 0.000
O4 0.472 -0.773 0.000
C5 -0.529 -1.798 0.000
H6 0.736 2.497 0.000
H7 1.768 1.333 0.881
H8 1.768 1.333 -0.881
H9 0.014 -2.743 0.000
H10 -1.162 -1.720 0.888
H11 -1.162 -1.720 -0.888

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 H6 H7 H8 H9 H10 H11
C11.50962.42112.35383.68161.08921.09361.09364.37484.04364.0436
C21.50961.20471.35072.35082.13532.14662.14663.23592.65252.6525
O32.42111.20472.25212.64252.57833.12303.12303.70352.63892.6389
O42.35381.35072.25211.43263.28062.62472.62472.02282.08702.0870
C53.68162.35082.64251.43264.47743.98153.98151.09011.09301.0930
H61.08922.13532.57833.28064.47741.78811.78815.28984.70934.7093
H71.09362.14663.12302.62473.98151.78811.76124.52384.23184.5864
H81.09362.14663.12302.62473.98151.78811.76124.52384.58644.2318
H94.37483.23593.70352.02281.09015.28984.52384.52381.79371.7937
H104.04362.65252.63892.08701.09304.70934.23184.58641.79371.7752
H114.04362.65252.63892.08701.09304.70934.58644.23181.79371.7752

picture of methyl acetate state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 O3 125.505 C1 C2 O4 110.579
C2 C1 H6 109.289 C2 C1 H7 110.159
C2 C1 H8 110.159 C2 O4 C5 115.886
O3 C2 O4 123.916 O4 C5 H9 106.068
O4 C5 H10 110.898 O4 C5 H11 110.898
H6 C1 H7 109.977 H6 C1 H8 109.977
H7 C1 H8 107.260 H9 C5 H10 110.225
H9 C5 H11 110.225 H10 C5 H11 108.524
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.477      
2 C 0.429      
3 O -0.350      
4 O -0.225      
5 C -0.235      
6 H 0.148      
7 H 0.150      
8 H 0.150      
9 H 0.131      
10 H 0.140      
11 H 0.140      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.497 -0.922 0.000 1.758
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.000 0.000 0.000
y 0.000 0.000 0.000
z 0.000 0.000 0.000


<r2> (average value of r2) Å2
<r2> 119.760
(<r2>)1/2 10.943