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: B3LYP/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3LYP/3-21G
 hartrees
Energy at 0K-266.909348
Energy at 298.15K-266.915909
Nuclear repulsion energy178.531100
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/3-21G
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' 3184 3072 6.45      
2 A' 3180 3069 13.75      
3 A' 3079 2971 1.27      
4 A' 3069 2962 20.30      
5 A' 1774 1712 139.61      
6 A' 1564 1510 9.61      
7 A' 1530 1477 19.76      
8 A' 1491 1439 8.40      
9 A' 1440 1390 31.48      
10 A' 1242 1198 294.54      
11 A' 1184 1143 9.68      
12 A' 1059 1022 87.53      
13 A' 970 936 2.10      
14 A' 812 783 14.92      
15 A' 631 608 4.89      
16 A' 404 390 6.46      
17 A' 267 258 13.55      
18 A" 3135 3025 5.75      
19 A" 3133 3023 21.71      
20 A" 1546 1492 11.28      
21 A" 1542 1488 7.35      
22 A" 1161 1120 0.04      
23 A" 1101 1062 11.12      
24 A" 598 577 4.78      
25 A" 174 168 9.59      
26 A" 70 68 0.48      
27 A" 62 60 0.72      

Unscaled Zero Point Vibrational Energy (zpe) 19702.0 cm-1
Scaled (by 0.9649) Zero Point Vibrational Energy (zpe) 19010.4 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/3-21G
ABC
0.32766 0.13595 0.09968

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.159 1.492 0.000
C2 0.000 0.520 0.000
O3 -1.198 0.774 0.000
O4 0.490 -0.775 0.000
C5 -0.547 -1.827 0.000
H6 0.778 2.512 0.000
H7 1.781 1.319 0.883
H8 1.781 1.319 -0.883
H9 0.009 -2.763 0.000
H10 -1.179 -1.745 0.888
H11 -1.179 -1.745 -0.888

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 H6 H7 H8 H9 H10 H11
C11.51262.46392.36343.73121.08941.09421.09424.40774.09064.0906
C21.51261.22461.38442.40952.13882.14262.14263.28322.70362.7036
O32.46391.22462.29092.68122.63163.15473.15473.73752.67132.6713
O42.36341.38442.29091.47673.29982.61362.61362.04572.12482.1248
C53.73122.40952.68121.47674.53674.01164.01161.08881.09301.0930
H61.08942.13882.63163.29984.53671.79221.79225.33134.76914.7691
H71.09422.14263.15472.61364.01161.79221.76664.53694.26034.6138
H81.09422.14263.15472.61364.01161.79221.76664.53694.61384.2603
H94.40773.28323.73752.04571.08885.33134.53694.53691.79871.7987
H104.09062.70362.67132.12481.09304.76914.26034.61381.79871.7754
H114.09062.70362.67132.12481.09304.76914.61384.26031.79871.7754

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 128.043 C1 C2 O4 109.255
C2 C1 H6 109.495 C2 C1 H7 109.514
C2 C1 H8 109.514 C2 O4 C5 114.700
O3 C2 O4 122.702 O4 C5 H9 104.749
O4 C5 H10 110.671 O4 C5 H11 110.671
H6 C1 H7 110.315 H6 C1 H8 110.315
H7 C1 H8 107.659 H9 C5 H10 111.058
H9 C5 H11 111.058 H10 C5 H11 108.620
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.629     -0.642
2 C 0.636     0.174
3 O -0.483     0.176
4 O -0.506     0.176
5 C -0.339     0.071
6 H 0.224     0.071
7 H 0.232     -0.030
8 H 0.232     -0.455
9 H 0.209     -0.515
10 H 0.212     0.854
11 H 0.212     0.120


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.240 -0.896 0.000 1.530
CHELPG        
AIM        
ESP -2.532 -3.770 0.000 4.542


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.522 -2.595 0.000
y -2.595 -31.036 0.000
z 0.000 0.000 -29.107
Traceless
 xyz
x -0.450 -2.595 0.000
y -2.595 -1.221 0.000
z 0.000 0.000 1.672
Polar
3z2-r23.344
x2-y20.514
xy-2.595
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.847 -0.218 0.000
y -0.218 6.777 0.000
z 0.000 0.000 3.660


<r2> (average value of r2) Å2
<r2> 121.270
(<r2>)1/2 11.012