File:Conformations-of-1,2-dihaloethanes-from-xtal-compared-F-vs-I-Mercury-3D-balls.png

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Ball-and-stick and space-filling models of the molecules 1,2-difluoroethane (C2H4F2) and 1,2-diiodoethane (C2H4I2), highlighting their different conformations. While 1,2-difluoroethane adopts a gauche conformation due to the gauche effect, 1,2-diiodoethane adopts an anti conformation (c.f. anti-periplanar) due to steric effects, specifically Van der Waals strain.

The molecular structures are taken from the crystal structures reported in J. Chem. Crystallogr. (2003) 33, 969-975:

Colour code:

  Carbon, C: grey
  Hydrogen, H: white
  Fluorine, F: yellow-green
  Iodine, I: purple
Model manipulated and image generated in CCDC Mercury 3.8.
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Author Ben Mills
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Public domain This work has been released into the public domain by its author, Benjah-bmm27. This applies worldwide.

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current12:12, 24 May 2020Thumbnail for version as of 12:12, 24 May 20202,000 × 1,490 (471 KB)Benjah-bmm27 (talk | contribs)== {{int:filedesc}} == {{Information | Description = Ball-and-stick and space-filling models of the molecules 1,2-difluoroethane (C<sub>2</sub>H<sub>4</sub>F<sub>2</sub>) and 1,2-diiodoethane (C<sub>2</sub>H<sub>4</sub>I<sub>2</sub>), highlighting their different conformations. 1,2-Difluoroethane adopts a [[:en:Alkane_stereochemistry#Conformation_of_alk...

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