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: HF/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 HF/6-31G
 hartrees
Energy at 0K-266.707347
Energy at 298.15K-266.714327
Nuclear repulsion energy180.599242
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 HF/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' 3366 3039 16.62      
2 A' 3338 3013 7.95      
3 A' 3244 2929 24.37      
4 A' 3222 2909 2.65      
5 A' 1899 1714 282.04      
6 A' 1660 1499 8.03      
7 A' 1627 1469 23.57      
8 A' 1624 1466 17.47      
9 A' 1579 1425 38.76      
10 A' 1424 1286 459.57      
11 A' 1321 1193 0.67      
12 A' 1190 1074 81.07      
13 A' 1075 971 23.94      
14 A' 905 817 18.06      
15 A' 690 623 15.67      
16 A' 446 402 7.69      
17 A' 281 254 19.08      
18 A" 3332 3009 25.34      
19 A" 3293 2973 5.92      
20 A" 1650 1490 8.88      
21 A" 1631 1473 10.58      
22 A" 1281 1157 2.74      
23 A" 1202 1085 16.27      
24 A" 653 590 20.36      
25 A" 186 168 15.86      
26 A" 129 116 0.34      
27 A" 101 91 0.53      

Unscaled Zero Point Vibrational Energy (zpe) 21173.8 cm-1
Scaled (by 0.9029) Zero Point Vibrational Energy (zpe) 19117.8 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 HF/6-31G
ABC
0.34327 0.13571 0.10087

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.115 1.505 0.000
C2 0.000 0.513 0.000
O3 -1.184 0.778 0.000
O4 0.453 -0.756 0.000
C5 -0.488 -1.854 0.000
H6 0.713 2.505 0.000
H7 1.737 1.357 0.873
H8 1.737 1.357 -0.873
H9 0.117 -2.743 0.000
H10 -1.109 -1.811 0.881
H11 -1.109 -1.811 -0.881

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 H6 H7 H8 H9 H10 H11
C11.49232.41102.35613.72211.07781.08211.08214.36324.08864.0886
C21.49231.21301.34772.41722.11562.11922.11923.25782.72162.7216
O32.41101.21302.24312.72242.56533.10293.10293.75302.73582.7358
O42.35611.34772.24311.44613.27162.62222.62222.01462.08012.0801
C53.72212.41722.72241.44614.52174.00304.00301.07491.07841.0784
H61.07782.11562.56533.27164.52171.76901.76905.28134.76694.7669
H71.08212.11923.10292.62224.00301.76901.74604.49354.25824.6053
H81.08212.11923.10292.62224.00301.76901.74604.49354.60534.2582
H94.36323.25783.75302.01461.07495.28134.49354.49351.77361.7736
H104.08862.72162.73582.08011.07844.76694.25824.60531.77361.7620
H114.08862.72162.73582.08011.07844.76694.60534.25821.77361.7620

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 125.740 C1 C2 O4 112.023
C2 C1 H6 109.757 C2 C1 H7 109.783
C2 C1 H8 109.783 C2 O4 C5 119.772
O3 C2 O4 122.238 O4 C5 H9 105.141
O4 C5 H10 110.120 O4 C5 H11 110.120
H6 C1 H7 109.965 H6 C1 H8 109.965
H7 C1 H8 107.557 H9 C5 H10 110.911
H9 C5 H11 110.911 H10 C5 H11 109.568
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.510 -0.486    
2 C 0.748 0.132    
3 O -0.567 0.134    
4 O -0.715 0.134    
5 C -0.122 0.023    
6 H 0.204 0.023    
7 H 0.204 0.209    
8 H 0.204 -0.653    
9 H 0.188 -0.712    
10 H 0.184 1.120    
11 H 0.184 0.076    


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.759 -1.158 0.000 2.106
CHELPG -3.369 -4.672 0.000 5.760
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.324 -3.547 0.000
y -3.547 -32.526 0.000
z 0.000 0.000 -29.457
Traceless
 xyz
x -0.333 -3.547 0.000
y -3.547 -2.136 0.000
z 0.000 0.000 2.468
Polar
3z2-r24.937
x2-y21.202
xy-3.547
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.705 0.046 0.000
y 0.046 6.529 0.000
z 0.000 0.000 3.818


<r2> (average value of r2) Å2
<r2> 120.657
(<r2>)1/2 10.984