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 CH3COOCH3 (methyl acetate)

using model chemistry: HF/CEP-121G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at HF/CEP-121G*
 hartrees
Energy at 0K-51.375062
Energy at 298.15K-51.382093
Nuclear repulsion energy101.822667
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 HF/CEP-121G*
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' 3334 3012 38.44      
2 A' 3328 3007 16.91      
3 A' 3229 2917 46.92      
4 A' 3215 2904 8.68      
5 A' 1961 1771 381.13      
6 A' 1633 1475 7.55      
7 A' 1616 1460 16.56      
8 A' 1602 1448 12.59      
9 A' 1546 1397 78.93      
10 A' 1411 1275 448.92      
11 A' 1328 1200 6.41      
12 A' 1189 1074 87.44      
13 A' 1070 966 9.68      
14 A' 938 847 19.57      
15 A' 685 619 11.77      
16 A' 448 405 8.26      
17 A' 301 272 13.63      
18 A" 3317 2997 42.79      
19 A" 3286 2968 19.32      
20 A" 1625 1468 4.93      
21 A" 1608 1453 6.49      
22 A" 1289 1164 4.66      
23 A" 1171 1058 7.16      
24 A" 658 594 15.46      
25 A" 192 173 5.33      
26 A" 162 146 3.70      
27 A" 77 70 0.13      

Unscaled Zero Point Vibrational Energy (zpe) 21108.2 cm-1
Scaled (by 0.9034) Zero Point Vibrational Energy (zpe) 19069.1 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 HF/CEP-121G*
ABC
0.34747 0.13867 0.10290

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-121G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.149 1.488 0.000
C2 0.000 0.499 0.000
O3 -1.159 0.791 0.000
O4 0.440 -0.761 0.000
C5 -0.553 -1.785 0.000
H6 0.755 2.495 0.000
H7 1.767 1.328 0.877
H8 1.767 1.328 -0.877
H9 -0.009 -2.720 0.000
H10 -1.174 -1.710 0.883
H11 -1.174 -1.710 -0.883

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 H6 H7 H8 H9 H10 H11
C11.51542.41012.35783.68921.08101.08511.08514.36394.05034.0503
C21.51541.19471.33462.35072.13362.13942.13943.21902.65372.6537
O32.41011.19472.22762.64652.56243.10093.10093.69412.65262.6526
O42.35781.33462.22761.42663.27092.62522.62522.00962.07052.0705
C53.68922.35072.64651.42664.47573.98013.98011.08121.08281.0828
H61.08102.13362.56243.27094.47571.77651.77655.27024.71024.7102
H71.08512.13943.10092.62523.98011.77651.75424.50574.22834.5802
H81.08512.13943.10092.62523.98011.77651.75424.50574.58024.2283
H94.36393.21903.69412.00961.08125.27024.50574.50571.77711.7771
H104.05032.65372.65262.07051.08284.71024.22834.58021.77711.7669
H114.05032.65372.65262.07051.08284.71024.58024.22831.77711.7669

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 125.156 C1 C2 O4 111.486
C2 C1 H6 109.379 C2 C1 H7 109.599
C2 C1 H8 109.599 C2 O4 C5 116.677
O3 C2 O4 123.358 O4 C5 H9 105.692
O4 C5 H10 110.455 O4 C5 H11 110.455
H6 C1 H7 110.189 H6 C1 H8 110.189
H7 C1 H8 107.865 H9 C5 H10 110.420
H9 C5 H11 110.420 H10 C5 H11 109.359
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-121G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.605      
2 C 0.522      
3 O -0.430      
4 O -0.330      
5 C -0.271      
6 H 0.203      
7 H 0.188      
8 H 0.188      
9 H 0.182      
10 H 0.177      
11 H 0.177      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.742 -1.114 0.000 2.068
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.428 -3.214 0.000
y -3.214 -33.089 0.000
z 0.000 0.000 -29.101
Traceless
 xyz
x 0.667 -3.214 0.000
y -3.214 -3.325 0.000
z 0.000 0.000 2.658
Polar
3z2-r25.315
x2-y22.662
xy-3.214
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.280 -0.097 0.000
y -0.097 6.634 0.000
z 0.000 0.000 4.404


<r2> (average value of r2) Å2
<r2> 98.171
(<r2>)1/2 9.908