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So I came across this diagram,the other day:

Bonds

As a chemistry student, I am well-versed with the dashed and wedged lines, but I was wondering what the wavy and the dotted line represent?

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I was wondering what the wavy and the dotted line represent?

Different bonds

  1. A dashed line indicates that the bond is extending behind the plane of the drawing surface
  2. A bold-wedged line indicates that the bond is protruding out from the plane of the drawing surface
  3. A solid line indicates that the bond exists in the plane of the drawing surface.
  4. A wavy line indicates that the stereochemistry of the bond is unknown.
  5. A dotted line indicates that the bond is not a full bond, it is only a partial bond as in a hydrogen bond or a partially formed or broken bond in a transition state.
  6. An arrow indicates a dative bond in which both electrons in the bond originate from one atom (not common)
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    $\begingroup$ As a side note, I would guide the OP to their second virtual friend. $\endgroup$ – M.A.R. Apr 10 '15 at 13:29
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    $\begingroup$ I think dotted lines are more often used for intermolecular attractions and dashed lines for partial bonds. $\endgroup$ – Jori Apr 10 '15 at 21:01
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    $\begingroup$ A wavy line could also mean isomerises rapidly, e.g. a methyl group between two carbonyls. $\endgroup$ – Jan May 4 '16 at 14:07
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The wavy line usually represents either that that part of the molecule is unimportant or that the stereochemistry at that specific position is unimportant (or unknown).

The dotted line usually represents intermolecular interactions, like hydrogen bonds. Dashed lines refer mostly to partial bonds such as in the transition state.

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