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: MP4/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 MP4/cc-pVTZ
 hartrees
Energy at 0K-307.228291
Energy at 298.15K 
HF Energy-305.988024
Nuclear repulsion energy243.431653
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 MP4/cc-pVTZ
Rotational Constants (cm-1) from geometry optimized at MP4/cc-pVTZ
ABC
0.27971 0.07000 0.05780

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.312 0.047 0.000
C2 -0.911 -0.509 0.000
O3 0.000 0.496 0.000
O4 -0.614 -1.687 0.000
C5 1.376 0.051 0.000
C6 2.243 1.292 0.000
H7 -3.027 -0.771 0.000
H8 -2.458 0.674 0.880
H9 -2.458 0.674 -0.880
H10 1.546 -0.569 0.882
H11 1.546 -0.569 -0.882
H12 3.296 1.007 0.000
H13 2.048 1.898 -0.885
H14 2.048 1.898 0.885

Atom - Atom Distances (Å)
  C1 C2 O3 O4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C11.50752.35522.42753.68834.72161.08681.09061.09064.00494.00495.69004.81824.8182
C21.50751.35661.21482.35503.63172.13222.13752.13752.61102.61104.47243.91573.9157
O32.35521.35662.26751.44612.37963.28172.61712.61712.07372.07373.33572.63482.6348
O42.42751.21482.26752.64224.12692.58153.12293.12292.58672.58674.74844.55184.5518
C53.68832.35501.44612.64221.51304.47953.98303.98301.09141.09142.14492.15532.1553
C64.72163.63172.37964.12691.51305.65914.82214.82212.17372.17371.09151.09071.0907
H71.08682.13223.28172.58154.47955.65911.78551.78554.66154.66156.56885.80185.8018
H81.09062.13752.61713.12293.98304.82211.78551.76084.19224.54765.83094.99164.6689
H91.09062.13752.61713.12293.98304.82211.78551.76084.54764.19225.83094.66894.9916
H104.00492.61102.07372.58671.09142.17374.66154.19224.54761.76402.51533.07582.5174
H114.00492.61102.07372.58671.09142.17374.66154.54764.19221.76402.51532.51743.0758
H125.69004.47243.33574.74842.14491.09156.56885.83095.83092.51532.51531.77121.7712
H134.81823.91572.63484.55182.15531.09075.80184.99164.66893.07582.51741.77121.7707
H144.81823.91572.63484.55182.15531.09075.80184.66894.99162.51743.07581.77121.7707

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 110.531 C1 C2 O4 125.838
C2 C1 H7 109.481 C2 C1 H8 109.672
C2 C1 H9 109.672 C2 O3 C5 114.295
O3 C2 O4 123.631 O3 C5 C6 107.031
O3 C5 H10 108.808 O3 C5 H11 108.808
C5 C6 H12 109.822 C5 C6 H13 110.693
C5 C6 H14 110.693 C6 C5 H10 112.140
C6 C5 H11 112.140 H7 C1 H8 110.167
H7 C1 H9 110.167 H8 C1 H9 107.659
H10 C5 H11 107.831 H12 C6 H13 108.516
H12 C6 H14 108.516 H13 C6 H14 108.538
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability