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: B1B95/daug-cc-pVTZ

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/daug-cc-pVTZ
 hartrees
Energy at 0K-307.684035
Energy at 298.15K 
HF Energy-307.684035
Nuclear repulsion energy245.149074
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/daug-cc-pVTZ
Rotational Constants (cm-1) from geometry optimized at B1B95/daug-cc-pVTZ
ABC
0.28607 0.07058 0.05845

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/daug-cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.300 0.039 0.000
C2 -0.906 -0.506 0.000
O3 0.000 0.480 0.000
O4 -0.612 -1.670 0.000
C5 1.370 0.058 0.000
C6 2.230 1.291 0.000
H7 -3.009 -0.779 0.000
H8 -2.452 0.665 0.876
H9 -2.452 0.665 -0.876
H10 1.543 -0.562 0.877
H11 1.543 -0.562 -0.877
H12 3.280 1.005 0.000
H13 2.042 1.898 -0.882
H14 2.042 1.898 0.882

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C11.49652.34202.40243.67004.70031.08271.08731.08733.98753.98755.66314.80474.8047
C21.49651.33921.20092.34533.61512.12042.12792.12792.60232.60234.45093.90503.9050
O32.34201.33922.23541.43322.37333.26192.61072.61072.05812.05813.32182.63782.6378
O42.40241.20092.23542.62994.10462.55743.09943.09942.57702.57704.72294.53354.5335
C53.67002.34531.43322.62991.50324.45843.96793.96791.08831.08832.13192.14792.1479
C64.70033.61512.37334.10461.50325.63374.80494.80492.16242.16241.08781.08731.0873
H71.08272.12043.26192.55744.45845.63371.77841.77844.64094.64096.53745.78425.7842
H81.08732.12792.61073.09943.96794.80491.77841.75224.17954.53235.80884.98084.6602
H91.08732.12792.61073.09943.96794.80491.77841.75224.53234.17955.80884.66024.9808
H103.98752.60232.05812.57701.08832.16244.64094.17954.53231.75412.49873.06532.5103
H113.98752.60232.05812.57701.08832.16244.64094.53234.17951.75412.49872.51033.0653
H125.66314.45093.32184.72292.13191.08786.53745.80885.80882.49872.49871.76311.7631
H134.80473.90502.63784.53352.14791.08735.78424.98084.66023.06532.51031.76311.7641
H144.80473.90502.63784.53352.14791.08735.78424.66024.98082.51033.06531.76311.7641

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 111.239 C1 C2 O4 125.553
C2 C1 H7 109.547 C2 C1 H8 109.875
C2 C1 H9 109.875 C2 O3 C5 115.505
O3 C2 O4 123.208 O3 C5 C6 107.826
O3 C5 H10 108.644 O3 C5 H11 108.644
C5 C6 H12 109.694 C5 C6 H13 111.008
C5 C6 H14 111.008 C6 C5 H10 112.121
C6 C5 H11 112.121 H7 C1 H8 110.076
H7 C1 H9 110.076 H8 C1 H9 107.367
H10 C5 H11 107.391 H12 C6 H13 108.304
H12 C6 H14 108.304 H13 C6 H14 108.437
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/daug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.991      
2 C 1.046      
3 O -0.080      
4 O -1.373      
5 C -0.674      
6 C -1.471      
7 H 0.377      
8 H 0.351      
9 H 0.351      
10 H 0.598      
11 H 0.598      
12 H 0.436      
13 H 0.417      
14 H 0.417      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.277 2.040 0.000 2.058
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.431 -1.089 0.000
y -1.089 -42.847 0.000
z 0.000 0.000 -35.521
Traceless
 xyz
x 8.753 -1.089 0.000
y -1.089 -9.872 0.000
z 0.000 0.000 1.118
Polar
3z2-r22.237
x2-y212.416
xy-1.089
xz0.000
yz0.000


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


<r2> (average value of r2) Å2
<r2> 199.060
(<r2>)1/2 14.109