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

using model chemistry: QCISD(T)=FULL/cc-pVTZ

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 QCISD(T)=FULL/cc-pVTZ
 hartrees
Energy at 0K-268.047669
Energy at 298.15K 
HF Energy-266.929567
Nuclear repulsion energy178.358188
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 QCISD(T)=FULL/cc-pVTZ
Rotational Constants (cm-1) from geometry optimized at QCISD(T)=FULL/cc-pVTZ
ABC
0.59517 0.09790 0.08678

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)=FULL/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.166 -0.261 0.000
C2 -0.689 -0.558 0.000
O3 0.000 0.709 0.000
C4 1.334 0.615 0.000
O5 1.968 -0.407 0.000
H6 -2.728 -1.193 0.000
H7 -2.442 0.310 0.883
H8 -2.442 0.310 -0.883
H9 -0.387 -1.120 -0.879
H10 -0.387 -1.120 0.879
H11 1.767 1.616 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.50682.37343.60834.13721.08791.08711.08712.16292.16294.3582
C21.50681.44162.33842.66172.13522.14632.14631.08671.08673.2797
O32.37341.44161.33742.26253.32502.62742.62742.06592.06591.9864
C43.60832.33841.33741.20264.44583.89023.89022.59732.59731.0905
O54.13722.66172.26251.20264.76134.55494.55492.61332.61332.0325
H61.08792.13523.32504.44584.76131.76631.76632.50152.50155.3001
H71.08712.14632.62743.89024.55491.76631.76593.06212.50424.4949
H81.08712.14632.62743.89024.55491.76631.76592.50423.06214.4949
H92.16291.08672.06592.59732.61332.50153.06212.50421.75853.5915
H102.16291.08672.06592.59732.61332.50152.50423.06211.75853.5915
H114.35823.27971.98641.09052.03255.30014.49494.49493.59153.5915

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 107.192 C1 C2 H9 111.999
C1 C2 H10 111.999 C2 C1 H6 109.701
C2 C1 H7 110.631 C2 C1 H8 110.631
C2 O3 C4 114.531 O3 C2 H9 108.779
O3 C2 H10 108.779 O3 C4 O5 125.850
O3 C4 H11 109.380 O5 C4 H11 124.770
H6 C1 H7 108.599 H6 C1 H8 108.599
H7 C1 H8 108.624 H9 C2 H10 108.010
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability