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Experimental data for C2H5I (Ethyl iodide)

22 02 02 11 45
Other names
Ethane, iodo-; iodoethane;
INChI INChIKey SMILES IUPAC name
InChI=1S/C2H5I/c1-2-3/h2H2,1H3 HVTICUPFWKNHNG-UHFFFAOYSA-N CCI
State Conformation
1A' CS
Enthalpy of formation (Hfg), Entropy, Integrated heat capacity (0 K to 298.15 K) (HH), Heat Capacity (Cp)
Property Value Uncertainty units Reference Comment
Hfg(298.15K) enthalpy of formation -7.20 0.80 kJ mol-1 webbook
Hfg(0K) enthalpy of formation   0.80 kJ mol-1 webbook
Information can also be found for this species in the NIST Chemistry Webbook
Vibrational levels (cm-1) vibrations
Mode Number Symmetry Frequency Intensity Comment Description
Fundamental(cm-1) Harmonic(cm-1) Reference (km mol-1) unc. Reference
1 A' 2987   1975Dur/Tho:41-58      
2 A' 2973   1975Dur/Tho:41-58      
3 A' 2932   1975Dur/Tho:41-58      
4 A' 1464          
5 A' 1419   1975Dur/Tho:41-58      
6 A' 1382   1975Dur/Tho:41-58      
7 A' 1208   1975Dur/Tho:41-58      
8 A' 1054   1975Dur/Tho:41-58      
9 A' 954   1975Dur/Tho:41-58      
10 A' 497   1971Dur/Pla:460-470      
11 A' 257   1971Dur/Pla:460-470      
12 A" 3026   1975Dur/Tho:41-58      
13 A" 2989   1975Dur/Tho:41-58      
14 A" 1452   1975Dur/Tho:41-58      
15 A" 1201   1975Dur/Tho:41-58      
16 A"     1975Dur/Tho:41-58       1049 in crystal
17 A" 741   1975Dur/Tho:41-58      
18 A" 258   1971Dur/Pla:460-470      

vibrational zero-point energy: 13396.7 cm-1 (from fundamental vibrations)
Calculated vibrational frequencies for C2H5I (Ethyl iodide).
Gas-phase IR spectra can be found in the NIST Chemistry Webbook here.
Rotational Constants (cm-1) rotational constants
See section I.F.4 to change rotational constant units
A B C reference comment
0.97122 0.09939 0.09328 1988Ina/Fuj:456-468

Calculated rotational constants for C2H5I (Ethyl iodide).
Product of moments of inertia moments of inertia
532053.9amu3Å6   2.43626008230225E-114gm3 cm6
Geometric Data
picture of Ethyl iodide

Point Group Cs


Internal coordinates
distances (r) in Å, angles (a) in degrees, dihedrals (d) in degrees
Description Value unc. Connectivity Reference Comment
Atom 1 Atom 2 Atom 3 Atom 4
rCI 2.151 0.001 1 3 1988Ina/Fuj:456-468
rCC 1.521 0.002 1 2 1988Ina/Fuj:456-468
rHC 1.086 0.001 1 4 1988Ina/Fuj:456-468
rHC 1.093   2 6 1988Ina/Fuj:456-468 ass.
rHC 1.093 0.001 2 7 1988Ina/Fuj:456-468
aCCI 111.62 0.08 2 1 3 1988Ina/Fuj:456-468
aHCI 104.83 0.03 3 1 4 1988Ina/Fuj:456-468
aHCC 112.57 0.07 2 1 4 1988Ina/Fuj:456-468
aHCH 109.85 0.08 4 1 5 1988Ina/Fuj:456-468
aHCC 108.6 0.3 1 2 6 1988Ina/Fuj:456-468
aHCC 110.8 0.12 1 2 7 1988Ina/Fuj:456-468
aHCH 109.32 0.17 6 2 7 1988Ina/Fuj:456-468
aHCH 107.93 0.15 7 2 8 1988Ina/Fuj:456-468

Cartesians
Atom x (Å) y (Å) z (Å)
C1 0.6978 -1.5456 0.0000
C2 -0.4442 -2.5499 0.0000
I3 -0.0277 0.4797 0.0000
H4 1.3175 -1.6190 0.8890
H5 1.3175 -1.6190 -0.8890
H6 -0.0222 -3.5577 0.0000
H7 -1.0739 -2.4217 0.8836
H8 -1.0739 -2.4217 -0.8836

Atom - Atom Distances bond lengths
Distances in Å
  C1 C2 I3 H4 H5 H6 H7 H8
C1   1.52082.15131.08621.08622.13702.16502.1650
C2 1.5208   3.05812.18192.18191.09251.09251.0925
I3 2.15133.0581   2.64662.64664.03743.20833.2083
H4 1.08622.18192.6466   1.77812.51862.52253.0831
H5 1.08622.18192.64661.7781   2.51863.08312.5225
H6 2.13701.09254.03742.51862.5186   1.78251.7825
H7 2.16501.09253.20832.52253.08311.7825   1.7671
H8 2.16501.09253.20833.08312.52251.78251.7671  

Calculated geometries for C2H5I (Ethyl iodide).

Experimental Bond Angles (degrees) from cartesians bond angles

atom1 atom2 atom3 angle         atom1 atom2 atom3 angle
C1 C2 H6 108.605 C1 C2 H7 110.811
C1 C2 H8 110.811 C2 C1 I3 111.622
C2 C1 H4 112.570 C2 C1 H5 112.570
I3 C1 H4 104.834 I3 C1 H5 104.834
H4 C1 H5 109.866 H6 C2 H7 109.324
H6 C2 H8 109.324 H7 C2 H8 107.945

Bond descriptions


Examples: C-C single bond, C=C, double bond, C#C triple bond, C:C aromatic bond
Bond Type Count
C-C 1
H-C 5
C-I 1

Connectivity
Atom 1 Atom 2
C1 C2
C1 I3
C1 H4
C1 H5
C2 H6
C2 H7
C2 H8
Electronic energy levels (cm-1)
Energy (cm-1) Degeneracy reference description
0 1   1A'

Ionization Energies (eV)
Ionization Energy I.E. unc. vertical I.E. v.I.E. unc. reference
9.349 0.001     webbook
Dipole, Quadrupole and Polarizability
Electric dipole moment dipole
State Config State description Conf description Exp. min. Dipole (Debye) Reference comment Point Group Components
x y z total dipole quadrupole
1 1 1A' Cs True 1.884 0.598   1.976 1988Ina/Fuj:456-468   Cs 2 3
Experimental dipole measurement abbreviations: MW microwave; DT Dielectric with Temperature variation; DR Indirect (usually an upper limit); MB Molecular beam
Calculated electric dipole moments for C2H5I (Ethyl iodide).
Electric quadrupole moment quadrupole
State Config State description Conf description Exp. min. Quadrupole (D Å) Reference comment Point Group Components
xx yy zz dipole quadrupole
1 1 1A' Cs True       Cs 2 3

Calculated electric quadrupole moments for C2H5I (Ethyl iodide).

References
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squib reference DOI
1971Dur/Pla:460-470 JR Durig, CM Player Jr., J. Bragin "Low-Frequency Vibrations of Molecular Solids. XI. Torsional Frequencies and Barriers to Internal Rotation of Some Single Methyl Rotors in the Solid State" J. Chem. Phys. 54, 460 (1971) 10.1063/1.1674864
1975Dur/Tho:41-58 JR Durig, JW Thompson, VW Thyagesan, JD Witt "Vibrational Spectra of Ethyl Iodides" J. Mol. Struct., 24 (1975) 41-58 10.1016/0022-2860(75)85064-2
1988Ina/Fuj:456-468 T INAGUSA, M FUJITAKE, M HAYASHI "Microwave Spectrum, rs Structure, Dipole Moment, and Nuclear Quadrupole Coupling Constant Tensor of Ethyl Iodide" JOURNAL OF MOLECULAR SPECTROSCOPY 128,456-468 (1988) 10.1016/0022-2852(88)90162-2
webbook NIST Chemistry Webbook (http://webbook.nist.gov/chemistry) 10.18434/T4D303

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