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

using model chemistry: B1B95/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B1B95/3-21G
 hartrees
Energy at 0K-266.794157
Energy at 298.15K-266.800850
Nuclear repulsion energy179.917256
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 B1B95/3-21G
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 3211 3072 4.40      
2 A 3205 3066 11.72      
3 A 3162 3025 2.57      
4 A 3157 3021 19.67      
5 A 3096 2962 0.52      
6 A 3085 2951 17.95      
7 A 1796 1718 143.15      
8 A 1561 1494 10.30      
9 A 1542 1475 12.23      
10 A 1536 1469 9.85      
11 A 1523 1457 20.67      
12 A 1490 1425 15.49      
13 A 1436 1374 39.94      
14 A 1262 1207 310.15      
15 A 1185 1134 6.83      
16 A 1164 1114 0.28      
17 A 1098 1050 12.80      
18 A 1071 1024 68.83      
19 A 986 943 1.08      
20 A 829 793 14.15      
21 A 638 610 5.67      
22 A 602 576 4.33      
23 A 403 385 6.85      
24 A 272 260 14.44      
25 A 180 172 10.07      
26 A 111 106 0.02      
27 A 77 74 1.30      

Unscaled Zero Point Vibrational Energy (zpe) 19837.9 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 18978.9 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 B1B95/3-21G
ABC
0.33099 0.13796 0.10105

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/3-21G

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.809 -0.510 -0.000
C2 -0.478 0.190 0.001
O3 -0.255 1.391 -0.000
O4 0.530 -0.747 0.000
C5 1.881 -0.171 -0.000
H6 -2.609 0.228 0.001
H7 -1.884 -1.149 -0.883
H8 -1.883 -1.152 0.881
H9 2.550 -1.026 -0.053
H10 2.014 0.490 -0.859
H11 2.052 0.406 0.911

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 H6 H7 H8 H9 H10 H11
C11.50352.45542.35153.70601.08791.09261.09254.38984.04454.0714
C21.50351.22191.37662.38702.13072.13282.13273.26362.65392.6977
O32.45541.22192.27772.64622.62543.14403.14533.70322.58842.6689
O42.35151.37662.27771.46873.28702.60222.60102.03932.11462.1148
C53.70602.38702.64621.46874.50763.98923.98891.08721.09141.0916
H61.08792.13072.62543.28704.50761.78961.78975.30904.70994.7519
H71.09262.13283.14402.60223.98921.78961.76404.51244.22934.5964
H81.09252.13273.14532.60103.98891.78971.76404.53234.57344.2323
H94.38983.26363.70322.03931.08725.30904.51244.53231.79851.7967
H104.04452.65392.58842.11461.09144.70994.22934.57341.79851.7720
H114.07142.69772.66892.11481.09164.75194.59644.23231.79671.7720

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 128.263 C1 C2 O4 109.388
C2 C1 H6 109.571 C2 C1 H7 109.463
C2 C1 H8 109.458 C2 O4 C5 114.013
O3 C2 O4 122.350 O4 C5 H9 104.877
O4 C5 H10 110.515 O4 C5 H11 110.518
H6 C1 H7 110.323 H6 C1 H8 110.332
H7 C1 H8 107.662 H9 C5 H10 111.288
H9 C5 H11 111.101 H10 C5 H11 108.531
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.678      
2 C 0.634      
3 O -0.485      
4 O -0.514      
5 C -0.386      
6 H 0.243      
7 H 0.251      
8 H 0.251      
9 H 0.226      
10 H 0.230      
11 H 0.229      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.319 -1.486 -0.004 1.520
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.256 1.404 -0.010
y 1.404 -34.627 0.008
z -0.010 0.008 -28.897
Traceless
 xyz
x 8.507 1.404 -0.010
y 1.404 -8.551 0.008
z -0.010 0.008 0.044
Polar
3z2-r20.088
x2-y211.372
xy1.404
xz-0.010
yz0.008


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.274 -0.049 0.007
y -0.049 5.211 0.003
z 0.007 0.003 3.723


<r2> (average value of r2) Å2
<r2> 120.933
(<r2>)1/2 10.997