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/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 B3LYP/CEP-121G
 hartrees
Energy at 0K-52.449828
Energy at 298.15K-52.456387
Nuclear repulsion energy98.921384
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/CEP-121G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3159 3079 20.92      
2 A' 3151 3070 12.25      
3 A' 3023 2946 7.22      
4 A' 3019 2942 31.95      
5 A' 1670 1627 200.97      
6 A' 1504 1466 9.49      
7 A' 1494 1456 28.21      
8 A' 1465 1428 15.08      
9 A' 1426 1390 32.84      
10 A' 1251 1219 319.61      
11 A' 1188 1158 2.99      
12 A' 1051 1024 89.98      
13 A' 969 944 12.88      
14 A' 799 778 22.58      
15 A' 615 600 8.04      
16 A' 405 395 5.44      
17 A' 259 253 15.33      
18 A" 3120 3041 33.48      
19 A" 3105 3026 12.09      
20 A" 1494 1456 16.28      
21 A" 1492 1454 7.18      
22 A" 1150 1121 0.53      
23 A" 1080 1052 7.37      
24 A" 574 560 7.05      
25 A" 176 171 12.20      
26 A" 96 94 0.36      
27 A" 48 47 0.67      

Unscaled Zero Point Vibrational Energy (zpe) 19390.3 cm-1
Scaled (by 0.9745) Zero Point Vibrational Energy (zpe) 18895.8 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/CEP-121G
ABC
0.32405 0.13160 0.09703

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/CEP-121G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.139 1.541 0.000
C2 0.000 0.535 0.000
O3 -1.221 0.799 0.000
O4 0.482 -0.775 0.000
C5 -0.530 -1.857 0.000
H6 0.727 2.551 0.000
H7 1.769 1.392 0.884
H8 1.769 1.392 -0.884
H9 0.050 -2.781 0.000
H10 -1.158 -1.784 0.894
H11 -1.158 -1.784 -0.894

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 H6 H7 H8 H9 H10 H11
C11.51982.47442.40713.78591.09141.09601.09604.45624.13924.1392
C21.51981.24971.39562.45002.14352.15572.15573.31552.74202.7420
O32.47441.24972.31962.74472.62023.17463.17463.79882.73442.7344
O42.40711.39562.31961.48213.33512.67082.67082.05152.12352.1235
C53.78592.45002.74471.48214.58414.07754.07751.09071.09481.0948
H61.09142.14352.62023.33514.58411.79251.79255.37444.81144.8114
H71.09602.15573.17462.67084.07751.79251.76834.59824.31964.6712
H81.09602.15573.17462.67084.07751.79251.76834.59824.67124.3196
H94.45623.31553.79882.05151.09075.37444.59824.59821.80341.8034
H104.13922.74202.73442.12351.09484.81144.31964.67121.80341.7876
H114.13922.74202.73442.12351.09484.81144.67124.31961.80341.7876

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 126.338 C1 C2 O4 111.230
C2 C1 H6 109.248 C2 C1 H7 109.941
C2 C1 H8 109.941 C2 O4 C5 116.687
O3 C2 O4 122.432 O4 C5 H9 104.732
O4 C5 H10 110.078 O4 C5 H11 110.078
H6 C1 H7 110.068 H6 C1 H8 110.068
H7 C1 H8 107.559 H9 C5 H10 111.211
H9 C5 H11 111.211 H10 C5 H11 109.452
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-121G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.578      
2 C 0.184      
3 O -0.177      
4 O -0.214      
5 C -0.293      
6 H 0.187      
7 H 0.183      
8 H 0.183      
9 H 0.174      
10 H 0.176      
11 H 0.176      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.594 -1.063 0.000 1.917
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.265 -3.499 0.000
y -3.499 -32.845 0.000
z 0.000 0.000 -29.583
Traceless
 xyz
x -0.050 -3.499 0.000
y -3.499 -2.421 0.000
z 0.000 0.000 2.472
Polar
3z2-r24.944
x2-y21.581
xy-3.499
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.793 -0.188 0.000
y -0.188 7.899 0.000
z 0.000 0.000 4.538


<r2> (average value of r2) Å2
<r2> 103.126
(<r2>)1/2 10.155