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: wB97X-D/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at wB97X-D/6-31G*
 hartrees
Energy at 0K-268.302710
Energy at 298.15K 
HF Energy-268.302710
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 wB97X-D/6-31G*
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' 3220 3054 6.30      
2 A' 3209 3044 17.64      
3 A' 3099 2939 3.03      
4 A' 3092 2933 27.34      
5 A' 1881 1784 240.26      
6 A' 1526 1447 12.17      
7 A' 1509 1431 20.21      
8 A' 1500 1422 10.32      
9 A' 1429 1356 85.30      
10 A' 1328 1260 327.04      
11 A' 1234 1171 1.26      
12 A' 1119 1061 53.52      
13 A' 1010 958 1.59      
14 A' 888 842 15.89      
15 A' 656 622 6.98      
16 A' 429 407 6.78      
17 A' 291 276 12.67      
18 A" 3174 3011 16.17      
19 A" 3174 3010 11.25      
20 A" 1523 1445 7.73      
21 A" 1506 1429 8.57      
22 A" 1191 1129 1.05      
23 A" 1077 1021 9.67      
24 A" 606 574 6.54      
25 A" 180 170 6.14      
26 A" 119 113 1.13      
27 A" 110i 105i 0.40      

Unscaled Zero Point Vibrational Energy (zpe) 19928.5 cm-1
Scaled (by 0.9485) Zero Point Vibrational Energy (zpe) 18902.2 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 wB97X-D/6-31G*
ABC
0.34131 0.13972 0.10297

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.135 1.465 0.000
C2 0.000 0.491 0.000
O3 -1.176 0.769 0.000
O4 0.474 -0.773 0.000
C5 -0.524 -1.780 0.000
H6 0.740 2.481 0.000
H7 1.762 1.314 0.883
H8 1.762 1.314 -0.883
H9 0.000 -2.737 0.000
H10 -1.157 -1.696 0.888
H11 -1.157 -1.696 -0.888

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 H6 H7 H8 H9 H10 H11
C11.49532.41332.33333.64471.09021.09381.09384.35224.00424.0042
C21.49531.20821.35032.33122.12292.13592.13593.22822.62902.6290
O32.41331.20822.25852.63122.56933.11593.11593.69802.62022.6202
O42.33331.35032.25851.41843.26482.60652.60652.02032.07412.0741
C53.64472.33122.63121.41844.44483.94743.94741.09111.09361.0936
H61.09022.12292.56933.26484.44481.78521.78525.27004.67284.6728
H71.09382.13593.11592.60653.94741.78521.76694.50484.19314.5518
H81.09382.13593.11592.60653.94741.78521.76694.50484.55184.1931
H94.35223.22823.69802.02031.09115.27004.50484.50481.79211.7921
H104.00422.62902.62022.07411.09364.67284.19314.55181.79211.7758
H114.00422.62902.62022.07411.09364.67284.55184.19311.79211.7758

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 126.089 C1 C2 O4 110.059
C2 C1 H6 109.382 C2 C1 H7 110.201
C2 C1 H8 110.201 C2 O4 C5 114.685
O3 C2 O4 123.853 O4 C5 H9 106.503
O4 C5 H10 110.656 O4 C5 H11 110.656
H6 C1 H7 109.649 H6 C1 H8 109.649
H7 C1 H8 107.739 H9 C5 H10 110.229
H9 C5 H11 110.229 H10 C5 H11 108.566
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.585      
2 C 0.608      
3 O -0.476      
4 O -0.450      
5 C -0.268      
6 H 0.206      
7 H 0.203      
8 H 0.203      
9 H 0.185      
10 H 0.187      
11 H 0.187      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.540 -0.980 0.000 1.825
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -32.035 4.605 0.000
y 4.605 -25.980 0.000
z 0.000 0.000 -28.687
Traceless
 xyz
x -4.702 4.605 0.000
y 4.605 4.380 0.000
z 0.000 0.000 0.321
Polar
3z2-r20.642
x2-y2-6.055
xy4.605
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.709 0.236 0.000
y 0.236 6.370 0.000
z 0.000 0.000 4.233


<r2> (average value of r2) Å2
<r2> 119.244
(<r2>)1/2 10.920