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 C2H3OC2H5 (Ethene, ethoxy-)

using model chemistry: HF/CEP-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at HF/CEP-31G*
 hartrees
Energy at 0K-42.260782
Energy at 298.15K-42.269369
Nuclear repulsion energy98.047018
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-31G*
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 3440 3089 33.68      
2 A 3366 3022 14.39      
3 A 3344 3003 22.52      
4 A 3313 2975 84.02      
5 A 3299 2962 72.72      
6 A 3254 2922 63.07      
7 A 3232 2903 44.89      
8 A 3213 2885 76.16      
9 A 1870 1679 191.06      
10 A 1659 1490 7.12      
11 A 1626 1460 3.87      
12 A 1610 1446 3.11      
13 A 1583 1421 46.31      
14 A 1542 1385 34.09      
15 A 1516 1362 59.26      
16 A 1437 1290 5.29      
17 A 1414 1270 1.38      
18 A 1315 1181 273.13      
19 A 1282 1151 33.26      
20 A 1264 1135 158.02      
21 A 1176 1056 8.15      
22 A 1073 964 33.58      
23 A 1050 943 8.34      
24 A 954 856 79.79      
25 A 929 834 6.90      
26 A 872 783 0.33      
27 A 766 688 5.03      
28 A 517 465 2.67      
29 A 461 414 1.17      
30 A 271 244 1.02      
31 A 227 204 0.89      
32 A 101 91 4.04      
33 A 43 38 1.44      

Unscaled Zero Point Vibrational Energy (zpe) 26508.7 cm-1
Scaled (by 0.898) Zero Point Vibrational Energy (zpe) 23804.8 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 HF/CEP-31G*
ABC
0.79038 0.07869 0.07398

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.472 -0.311 0.068
H2 -2.503 -1.384 0.193
H3 -3.399 0.245 0.054
C4 -1.305 0.345 -0.086
H5 -1.267 1.422 -0.211
O6 -0.109 -0.291 -0.127
C7 1.023 0.524 0.119
H8 0.956 0.954 1.122
H9 1.047 1.346 -0.602
C10 2.272 -0.347 -0.015
H11 2.245 -1.163 0.708
H12 2.332 -0.772 -1.017
H13 3.167 0.253 0.166

Atom - Atom Distances (Å)
  C1 H2 H3 C4 H5 O6 C7 H8 H9 C10 H11 H12 H13
C11.08121.08121.34782.12842.37083.59383.80283.94684.74484.83594.94605.6677
H21.08121.86442.12283.09272.65114.01064.27774.54884.89134.78165.02125.9019
H31.08121.86442.10182.44973.33854.43194.54024.62755.70265.85405.91826.5672
C41.34782.12282.10181.08431.35512.34382.63472.60733.64383.93783.91634.4796
H52.12843.09272.44971.08432.06972.48222.63442.34843.96154.45664.29144.6012
O62.37082.65113.33851.35512.06971.41722.06042.06012.38462.64562.64203.3339
C73.59384.01064.43192.34382.48221.41721.09291.09351.52842.16452.16412.1613
H83.80284.27774.54022.63472.63442.06041.09291.77032.17122.51213.07322.5084
H93.94684.54884.62752.60732.34842.06011.09351.77032.17043.07322.51202.5058
C104.74484.89135.70263.64383.96152.38461.52842.17122.17041.09021.09041.0921
H114.83594.78165.85403.93784.45662.64562.16452.51213.07321.09021.77031.7737
H124.94605.02125.91823.91634.29142.64202.16413.07322.51201.09041.77031.7742
H135.66775.90196.56724.47964.60123.33392.16132.50842.50581.09211.77371.7742

picture of Ethene, ethoxy- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C4 H5 121.748 C1 C4 O6 122.598
H2 C1 H3 119.123 H2 C1 C4 121.444
H3 C1 C4 119.427 C4 O6 C7 115.420
H5 C4 O6 115.638 O6 C7 H8 109.664
O6 C7 H9 109.602 O6 C7 C10 108.042
C7 C10 H11 110.379 C7 C10 H12 110.340
C7 C10 H13 110.016 H8 C7 H9 108.129
H8 C7 C10 110.747 H9 C7 C10 110.650
H11 C10 H12 108.550 H11 C10 H13 108.734
H12 C10 H13 108.776
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.405      
2 H 0.195      
3 H 0.160      
4 C -0.118      
5 H 0.191      
6 O -0.277      
7 C -0.083      
8 H 0.101      
9 H 0.092      
10 C -0.186      
11 H 0.114      
12 H 0.114      
13 H 0.102      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.046 1.617 0.229 1.940
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -29.461 -0.047 0.130
y -0.047 -30.220 -0.657
z 0.130 -0.657 -33.460
Traceless
 xyz
x 2.379 -0.047 0.130
y -0.047 1.241 -0.657
z 0.130 -0.657 -3.620
Polar
3z2-r2-7.240
x2-y20.759
xy-0.047
xz0.130
yz-0.657


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 9.518 1.056 -0.251
y 1.056 5.987 -0.152
z -0.251 -0.152 4.699


<r2> (average value of r2) Å2
<r2> 132.650
(<r2>)1/2 11.517