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All results from a given calculation for HCOOC2H5 (Ethyl formate)

using model chemistry: CCSD(T)/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS trans 1A'
Energy calculated at CCSD(T)/6-31G*
 hartrees
Energy at 0K-267.625717
Energy at 298.15K 
HF Energy-266.824839
Nuclear repulsion energy176.913920
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 CCSD(T)/6-31G*
Rotational Constants (cm-1) from geometry optimized at CCSD(T)/6-31G*
ABC
0.58444 0.09650 0.08550

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.181 -0.252 0.000
C2 -0.697 -0.564 0.000
O3 0.000 0.713 0.000
C4 1.344 0.616 0.000
O5 1.983 -0.417 0.000
H6 -2.758 -1.186 0.000
H7 -2.454 0.327 0.891
H8 -2.454 0.327 -0.891
H9 -0.391 -1.132 -0.887
H10 -0.391 -1.132 0.887
H11 1.783 1.627 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.51622.38503.63084.16771.09801.09661.09662.18332.18334.3869
C21.51621.45462.35822.68462.15272.16132.16131.09721.09723.3093
O32.38501.45461.34782.28243.34862.63882.63882.08422.08422.0037
C43.63082.35821.34781.21474.48093.91183.91182.61822.61821.1018
O54.16772.68462.28241.21474.80344.58624.58622.63352.63352.0536
H61.09802.15273.34864.48094.80341.78191.78192.52852.52855.3419
H71.09662.16132.63883.91184.58621.78191.78133.08942.52674.5204
H81.09662.16132.63883.91184.58621.78191.78132.52673.08944.5204
H92.18331.09722.08422.61822.63352.52853.08942.52671.77413.6230
H102.18331.09722.08422.61822.63352.52852.52673.08941.77413.6230
H114.38693.30932.00371.10182.05365.34194.52044.52043.62303.6230

picture of Ethyl formate state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 O3 106.778 C1 C2 H9 112.326
C1 C2 H10 112.326 C2 C1 H6 109.830
C2 C1 H7 110.598 C2 C1 H8 110.598
C2 O3 C4 114.537 O3 C2 H9 108.710
O3 C2 H10 108.710 O3 C4 O5 125.844
O3 C4 H11 109.351 O5 C4 H11 124.805
H6 C1 H7 108.568 H6 C1 H8 108.568
H7 C1 H8 108.622 H9 C2 H10 107.889
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability