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 C4H8O2 (Ethyl acetate)

using model chemistry: M06-2X/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 M06-2X/3-21G*
 hartrees
Energy at 0K-305.866184
Energy at 298.15K 
HF Energy-305.866184
Nuclear repulsion energy241.674418
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 M06-2X/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' 3222 3051 2.60 57.68 0.68 0.81
2 A' 3174 3006 12.14 59.22 0.74 0.85
3 A' 3114 2949 0.09 88.72 0.01 0.01
4 A' 3103 2939 9.14 62.70 0.15 0.25
5 A' 3102 2938 7.79 109.29 0.01 0.02
6 A' 1822 1726 165.24 2.33 0.55 0.71
7 A' 1583 1499 7.45 1.14 0.75 0.86
8 A' 1568 1485 5.03 29.29 0.75 0.86
9 A' 1532 1451 18.42 18.85 0.74 0.85
10 A' 1470 1392 11.66 4.78 0.71 0.83
11 A' 1450 1373 48.43 3.50 0.73 0.85
12 A' 1430 1355 0.26 3.95 0.73 0.84
13 A' 1287 1219 435.53 0.49 0.61 0.76
14 A' 1162 1100 17.00 6.91 0.15 0.27
15 A' 1096 1038 84.18 2.68 0.71 0.83
16 A' 1036 981 2.00 2.73 0.43 0.60
17 A' 951 901 1.49 1.56 0.56 0.72
18 A' 862 816 9.73 13.48 0.28 0.43
19 A' 640 607 8.29 9.29 0.34 0.50
20 A' 411 389 0.62 0.25 0.59 0.75
21 A' 364 345 13.61 2.52 0.37 0.54
22 A' 189 179 5.40 0.31 0.70 0.83
23 A" 3184 3016 17.92 22.99 0.75 0.86
24 A" 3176 3008 0.85 50.37 0.75 0.86
25 A" 3142 2976 8.90 66.99 0.75 0.86
26 A" 1555 1473 8.20 22.93 0.75 0.86
27 A" 1541 1460 11.93 20.53 0.75 0.86
28 A" 1320 1250 0.00 13.48 0.75 0.86
29 A" 1204 1140 6.53 3.65 0.75 0.86
30 A" 1109 1050 12.47 0.61 0.75 0.86
31 A" 848 803 1.90 0.09 0.75 0.86
32 A" 603 571 5.76 1.40 0.75 0.86
33 A" 257 243 1.90 0.00 0.75 0.86
34 A" 153 145 6.12 0.01 0.75 0.86
35 A" 89 85 1.13 0.12 0.75 0.86
36 A" 45 42 0.32 0.29 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 26395.0 cm-1
Scaled (by 0.9472) Zero Point Vibrational Energy (zpe) 25001.4 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 M06-2X/3-21G*
ABC
0.27220 0.06936 0.05705

See section I.F.4 to change rotational constant units
Geometric Data calculated at M06-2X/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.321 0.050 0.000
C2 -0.928 -0.529 0.000
O3 0.000 0.485 0.000
O4 -0.608 -1.708 0.000
C5 1.407 0.047 0.000
C6 2.231 1.329 0.000
H7 -3.049 -0.759 0.000
H8 -2.449 0.680 0.883
H9 -2.449 0.680 -0.883
H10 1.591 -0.568 0.885
H11 1.591 -0.568 -0.885
H12 3.299 1.095 0.000
H13 1.994 1.921 -0.887
H14 1.994 1.921 0.887

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C11.50892.36162.45473.72854.72911.08851.09301.09304.05834.05835.71684.78634.7863
C21.50891.37401.22172.40493.66502.13412.13502.13502.66992.66994.52813.91443.9144
O32.36161.37402.27521.47382.38593.29332.61122.61122.10292.10293.35522.61242.6124
O42.45471.22172.27522.67204.15752.61943.14263.14262.63012.63014.80834.55214.5521
C53.72852.40491.47382.67201.52424.52904.00694.00691.09301.09302.16282.15432.1543
C64.72913.66502.38594.15751.52425.67884.80754.80752.18892.18891.09321.09231.0923
H71.08852.13413.29332.61944.52905.67881.79261.79264.72794.72796.61395.77975.7797
H81.09302.13502.61123.14264.00694.80751.79261.76684.22894.58365.83094.94134.6132
H91.09302.13502.61123.14264.00694.80751.79261.76684.58364.22895.83094.61324.9413
H104.05832.66992.10292.63011.09302.18894.72794.22894.58361.76962.54273.08122.5208
H114.05832.66992.10292.63011.09302.18894.72794.58364.22891.76962.54272.52083.0812
H125.71684.52813.35524.80832.16281.09326.61395.83095.83092.54272.54271.78111.7811
H134.78633.91442.61244.55212.15431.09235.77974.94134.61323.08122.52081.78111.7741
H144.78633.91442.61244.55212.15431.09235.77974.61324.94132.52083.08121.78111.7741

picture of Ethyl acetate state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 O3 109.918 C1 C2 O4 127.732
C2 C1 H7 109.437 C2 C1 H8 109.243
C2 C1 H9 109.243 C2 O3 C5 115.190
O3 C2 O4 122.349 O3 C5 C6 105.460
O3 C5 H10 109.124 O3 C5 H11 109.124
C5 C6 H12 110.362 C5 C6 H13 109.749
C5 C6 H14 109.749 C6 C5 H10 112.472
C6 C5 H11 112.472 H7 C1 H8 110.517
H7 C1 H9 110.517 H8 C1 H9 107.851
H10 C5 H11 108.097 H12 C6 H13 109.170
H12 C6 H14 109.170 H13 C6 H14 108.611
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at M06-2X/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.642      
2 C 0.651      
3 O -0.549      
4 O -0.497      
5 C -0.158      
6 C -0.596      
7 H 0.234      
8 H 0.242      
9 H 0.242      
10 H 0.220      
11 H 0.220      
12 H 0.201      
13 H 0.216      
14 H 0.216      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.191 1.717 0.000 1.728
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -29.992 -1.072 0.000
y -1.072 -42.698 0.000
z 0.000 0.000 -35.531
Traceless
 xyz
x 9.122 -1.072 0.000
y -1.072 -9.937 0.000
z 0.000 0.000 0.814
Polar
3z2-r21.629
x2-y212.706
xy-1.072
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.772 0.444 0.000
y 0.444 6.686 0.000
z 0.000 0.000 5.006


<r2> (average value of r2) Å2
<r2> 202.879
(<r2>)1/2 14.244