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

using model chemistry: HF/CEP-121G

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 HF/CEP-121G
 hartrees
Energy at 0K-51.231171
Energy at 298.15K-51.238462
HF Energy-51.231171
Nuclear repulsion energy98.709421
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 HF/CEP-121G
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' 3310 3020 40.50 114.29 0.29 0.45
2 A' 3253 2969 54.12 60.85 0.74 0.85
3 A' 3212 2931 16.83 122.52 0.11 0.20
4 A' 3162 2885 29.90 124.93 0.02 0.04
5 A' 1811 1653 415.28 8.27 0.22 0.36
6 A' 1657 1512 12.94 4.18 0.62 0.76
7 A' 1636 1493 5.25 18.90 0.74 0.85
8 A' 1569 1432 18.70 3.68 0.63 0.77
9 A' 1529 1396 7.81 1.88 0.65 0.79
10 A' 1498 1366 11.64 5.62 0.52 0.68
11 A' 1306 1192 567.53 1.82 0.20 0.33
12 A' 1231 1123 8.55 8.75 0.18 0.30
13 A' 1106 1009 15.05 7.09 0.71 0.83
14 A' 895 817 28.02 14.46 0.28 0.44
15 A' 811 740 3.03 5.75 0.50 0.67
16 A' 392 357 7.77 2.27 0.36 0.53
17 A' 222 203 11.94 0.67 0.49 0.66
18 A" 3288 3000 74.10 3.75 0.75 0.86
19 A" 3258 2973 5.20 105.04 0.75 0.86
20 A" 1623 1481 6.75 15.51 0.75 0.86
21 A" 1404 1281 1.79 12.91 0.75 0.86
22 A" 1288 1175 8.85 1.20 0.75 0.86
23 A" 1133 1034 1.30 3.02 0.75 0.86
24 A" 885 807 0.13 0.15 0.75 0.86
25 A" 331 302 47.55 1.62 0.75 0.86
26 A" 236 216 5.63 0.61 0.75 0.86
27 A" 61 56 1.25 0.40 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 21053.3 cm-1
Scaled (by 0.9125) Zero Point Vibrational Energy (zpe) 19211.1 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 HF/CEP-121G
ABC
0.60952 0.09255 0.08281

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-121G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.210 -0.283 0.000
C2 -0.724 -0.617 0.000
O3 0.000 0.660 0.000
C4 1.346 0.670 0.000
O5 2.049 -0.327 0.000
H6 -2.792 -1.200 0.000
H7 -2.473 0.294 0.880
H8 -2.473 0.294 -0.880
H9 -0.426 -1.175 -0.879
H10 -0.426 -1.175 0.879
H11 1.725 1.682 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 C4 O5 H6 H7 H8 H9 H10 H11
C11.52332.40283.68184.25931.08651.08431.08432.17952.17954.3987
C21.52331.46802.43772.78792.14872.15972.15971.08301.08303.3592
O32.40281.46801.34632.27443.35492.65062.65062.07902.07902.0054
C43.68182.43771.34631.21994.54123.93773.93772.70552.70551.0806
O54.25932.78792.27441.21994.91904.64884.64882.76042.76042.0350
H61.08652.14873.35494.54124.91901.76281.76282.52372.52375.3585
H71.08432.15972.65063.93774.64881.76281.75953.07262.51924.5090
H81.08432.15972.65063.93774.64881.76281.75952.51923.07264.5090
H92.17951.08302.07902.70552.76042.52373.07262.51921.75863.6832
H102.17951.08302.07902.70552.76042.52372.51923.07261.75863.6832
H114.39873.35922.00541.08062.03505.35854.50904.50903.68323.6832

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 106.869 C1 C2 H9 112.391
C1 C2 H10 112.391 C2 C1 H6 109.703
C2 C1 H7 110.707 C2 C1 H8 110.707
C2 O3 C4 119.970 O3 C2 H9 108.225
O3 C2 H10 108.225 O3 C4 O5 124.743
O3 C4 H11 110.966 O5 C4 H11 124.291
H6 C1 H7 108.600 H6 C1 H8 108.600
H7 C1 H8 108.463 H9 C2 H10 108.573
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-121G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.431      
2 C -0.029      
3 O -0.374      
4 C 0.222      
5 O -0.326      
6 H 0.147      
7 H 0.159      
8 H 0.159      
9 H 0.159      
10 H 0.159      
11 H 0.153      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.365 0.655 0.000 2.454
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -34.937 6.726 0.000
y 6.726 -29.409 0.000
z 0.000 0.000 -29.538
Traceless
 xyz
x -5.463 6.726 0.000
y 6.726 2.829 0.000
z 0.000 0.000 2.635
Polar
3z2-r25.270
x2-y2-5.528
xy6.726
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.519 0.003 0.000
y 0.003 5.567 0.000
z 0.000 0.000 4.288


<r2> (average value of r2) Å2
<r2> 114.183
(<r2>)1/2 10.686