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

using model chemistry: mPW1PW91/6-31G(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 mPW1PW91/6-31G(2df,p)
 hartrees
Energy at 0K-268.341557
Energy at 298.15K-268.348313
Nuclear repulsion energy182.420326
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 mPW1PW91/6-31G(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 3208 3062 4.86      
2 A 3190 3045 14.15      
3 A 3161 3018 3.83      
4 A 3158 3015 17.56      
5 A 3084 2945 2.21      
6 A 3075 2936 26.24      
7 A 1862 1778 225.02      
8 A 1502 1434 7.14      
9 A 1486 1419 8.30      
10 A 1480 1413 31.75      
11 A 1477 1410 6.47      
12 A 1469 1402 11.06      
13 A 1397 1334 74.47      
14 A 1298 1240 295.42      
15 A 1216 1161 1.21      
16 A 1186 1132 1.03      
17 A 1106 1055 54.67      
18 A 1067 1019 8.30      
19 A 996 951 1.85      
20 A 880 840 14.57      
21 A 654 624 6.39      
22 A 615 587 4.84      
23 A 423 403 6.50      
24 A 285 272 11.82      
25 A 183 175 5.76      
26 A 127 121 0.30      
27 A 59 56 0.35      

Unscaled Zero Point Vibrational Energy (zpe) 19821.9 cm-1
Scaled (by 0.9547) Zero Point Vibrational Energy (zpe) 18924.0 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 mPW1PW91/6-31G(2df,p)
ABC
0.34345 0.14083 0.10374

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31G(2df,p)

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.791 -0.508 0.000
C2 -0.454 0.178 -0.001
O3 -0.273 1.365 -0.000
O4 0.542 -0.723 -0.001
C5 1.851 -0.165 0.001
H6 -2.581 0.239 -0.021
H7 -1.874 -1.169 -0.865
H8 -1.889 -1.130 0.893
H9 2.537 -1.010 0.002
H10 2.010 0.453 -0.885
H11 2.007 0.453 0.887

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 H6 H7 H8 H9 H10 H11
C11.50272.41132.34313.65811.08771.09191.09234.35704.01904.0170
C21.50271.20121.34272.33022.12842.13942.13763.21822.63182.6309
O32.41131.20122.24122.61742.56873.11993.10413.67942.61222.6109
O42.34311.34272.24121.42273.26832.60492.62282.01532.07772.0779
C53.65812.33022.61741.42274.45073.95423.96461.08891.09171.0918
H61.08772.12842.56873.26834.45071.78681.78545.26854.67634.6824
H71.09192.13943.11992.60493.95421.78681.75874.49854.20914.5570
H81.09232.13763.10412.62283.96461.78541.75874.51684.56834.2056
H94.35703.21823.67942.01531.08895.26854.49854.51681.79091.7908
H104.01902.63182.61222.07771.09174.67634.20914.56831.79091.7723
H114.01702.63092.61092.07791.09184.68244.55704.20561.79081.7723

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 125.827 C1 C2 O4 110.742
C2 C1 H6 109.456 C2 C1 H7 110.080
C2 C1 H8 109.911 C2 O4 C5 114.807
O3 C2 O4 123.431 O4 C5 H9 105.957
O4 C5 H10 110.761 O4 C5 H11 110.768
H6 C1 H7 110.132 H6 C1 H8 109.972
H7 C1 H8 107.264 H9 C5 H10 110.426
H9 C5 H11 110.406 H10 C5 H11 108.524
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.546      
2 C 0.459      
3 O -0.373      
4 O -0.259      
5 C -0.292      
6 H 0.176      
7 H 0.176      
8 H 0.176      
9 H 0.156      
10 H 0.163      
11 H 0.163      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.278 -1.750 0.006 1.772
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.975 1.242 -0.005
y 1.242 -33.854 -0.006
z -0.005 -0.006 -28.529
Traceless
 xyz
x 7.217 1.242 -0.005
y 1.242 -7.602 -0.006
z -0.005 -0.006 0.386
Polar
3z2-r20.771
x2-y29.879
xy1.242
xz-0.005
yz-0.006


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.001 -0.005 -0.002
y -0.005 5.790 -0.002
z -0.002 -0.002 4.522


<r2> (average value of r2) Å2
<r2> 118.451
(<r2>)1/2 10.884