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: CBS-Q

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 CBS-Q
 hartrees
Energy at 0K-267.967034
Energy at 298.15K-267.960329
HF Energy-266.827356
Nuclear repulsion energy179.329986
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 CBS-Q
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3275 3275 37.26 66.92 0.69 0.82
2 A' 3270 3270 76.37 109.67 0.25 0.40
3 A' 3244 3244 15.21 99.39 0.18 0.30
4 A' 3201 3201 21.29 97.94 0.02 0.03
5 A' 2004 2004 421.83 5.36 0.35 0.52
6 A' 1660 1660 6.01 1.92 0.71 0.83
7 A' 1633 1633 1.97 19.98 0.75 0.85
8 A' 1574 1574 18.50 4.80 0.63 0.77
9 A' 1542 1542 5.79 4.88 0.56 0.72
10 A' 1527 1527 0.91 0.39 0.32 0.48
11 A' 1369 1369 559.81 1.12 0.18 0.30
12 A' 1234 1234 19.04 5.94 0.19 0.32
13 A' 1114 1114 19.11 5.19 0.74 0.85
14 A' 945 945 19.90 8.33 0.34 0.51
15 A' 860 860 3.17 4.73 0.44 0.61
16 A' 408 408 7.04 1.64 0.37 0.54
17 A' 245 245 9.07 0.38 0.38 0.55
18 A" 3303 3303 60.00 5.45 0.75 0.86
19 A" 3274 3274 3.43 108.59 0.75 0.86
20 A" 1620 1620 3.88 17.48 0.75 0.86
21 A" 1423 1423 1.74 9.86 0.75 0.86
22 A" 1291 1291 5.92 0.89 0.75 0.86
23 A" 1182 1182 5.28 3.22 0.75 0.86
24 A" 873 873 0.04 0.12 0.75 0.86
25 A" 354 354 30.27 1.86 0.75 0.86
26 A" 254 254 4.23 0.66 0.75 0.86
27 A" 78 78 0.75 0.27 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 21378.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 21378.8 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at CBS-Q
ABC
0.58805 0.09705 0.08601

See section I.F.4 to change rotational constant units
Geometric Data calculated at CBS-Q

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.169 -0.296 0.000
C2 -0.682 -0.585 0.000
O3 0.000 0.668 0.000
C4 1.314 0.643 0.000
O5 1.988 -0.325 0.000
H6 -2.728 -1.229 0.000
H7 -2.450 0.274 0.881
H8 -2.450 0.274 -0.881
H9 -0.381 -1.148 -0.877
H10 -0.381 -1.148 0.877
H11 1.704 1.660 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.51512.37363.60774.15741.08771.08651.08652.16642.16644.3391
C21.51511.42732.34412.68282.14452.15472.15471.08441.08443.2767
O32.37361.42731.31462.22273.32262.63362.63362.05232.05231.9719
C43.60772.34411.31461.17984.45453.88403.88402.61712.61711.0891
O54.15742.68282.22271.17984.80174.56474.56472.65662.65662.0055
H61.08772.14453.32264.45454.80171.76441.76442.50682.50685.2904
H71.08652.15472.63363.88404.56471.76441.76273.06542.51084.4675
H81.08652.15472.63363.88404.56471.76441.76272.51083.06544.4675
H92.16641.08442.05232.61712.65662.50683.06542.51081.75433.6054
H102.16641.08442.05232.61712.65662.50682.51083.06541.75433.6054
H114.33913.27671.97191.08912.00555.29044.46754.46753.60543.6054

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 107.512 C1 C2 H9 111.825
C1 C2 H10 111.825 C2 C1 H6 109.872
C2 C1 H7 110.754 C2 C1 H8 110.754
C2 O3 C4 117.437 O3 C2 H9 108.820
O3 C2 H10 108.820 O3 C4 O5 125.935
O3 C4 H11 109.878 O5 C4 H11 124.187
H6 C1 H7 108.487 H6 C1 H8 108.487
H7 C1 H8 108.418 H9 C2 H10 107.967
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability