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 HCOOC2H5 (Ethyl formate)

using model chemistry: QCISD/6-31+G**

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/6-31+G**
 hartrees
Energy at 0K-267.669117
Energy at 298.15K 
HF Energy-266.842620
Nuclear repulsion energy177.090503
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/6-31+G**
Rotational Constants (cm-1) from geometry optimized at QCISD/6-31+G**
ABC
0.59150 0.09613 0.08533

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-31+G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.183 -0.258 0.000
C2 -0.701 -0.568 0.000
O3 0.000 0.704 0.000
C4 1.343 0.623 0.000
O5 1.991 -0.404 0.000
H6 -2.751 -1.190 0.000
H7 -2.456 0.316 0.886
H8 -2.456 0.316 -0.886
H9 -0.397 -1.130 -0.884
H10 -0.397 -1.130 0.884
H11 1.771 1.629 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.51372.38543.63434.17691.09151.09011.09012.17472.17474.3807
C21.51371.45262.36572.69772.14182.15532.15531.09041.09043.3070
O32.38541.45261.34582.27923.33982.63992.63992.07422.07421.9976
C43.63432.36571.34581.21404.47713.91353.91352.62302.62301.0935
O54.17692.69772.27921.21404.80694.59194.59192.64832.64832.0449
H61.09152.14183.33984.47714.80691.77131.77132.51452.51455.3281
H71.09012.15532.63993.91354.59191.77131.77193.07562.51564.5142
H81.09012.15532.63993.91354.59191.77131.77192.51563.07564.5142
H92.17471.09042.07422.62302.64832.51453.07562.51561.76733.6182
H102.17471.09042.07422.62302.64832.51452.51563.07561.76733.6182
H114.38073.30701.99761.09352.04495.32814.51424.51423.61823.6182

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 107.042 C1 C2 H9 112.235
C1 C2 H10 112.235 C2 C1 H6 109.530
C2 C1 H7 110.686 C2 C1 H8 110.686
C2 O3 C4 115.373 O3 C2 H9 108.467
O3 C2 H10 108.467 O3 C4 O5 125.764
O3 C4 H11 109.526 O5 C4 H11 124.711
H6 C1 H7 108.577 H6 C1 H8 108.577
H7 C1 H8 108.728 H9 C2 H10 108.268
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability