Hi Frederico,

I think the difference is just semantic. The RDKit calculation uses a
scheme where higher priority -> higher rank.

Is there a particular reason you're concerned about this?

-greg

On Wed, Aug 1, 2018 at 4:04 PM FREDERICO TEIXEIRA SILVA <
[email protected]> wrote:

> Hello,
>
> I got the following result from atom.GetProp('_CIPRank').
>
> Atom:   C   priority:   0
> Atom:   N   priority:   1
> Atom:   O   priority:   2
> Atom:   P   priority:   3
> Atom:   I   priority:   4
>
> But Cahn-Ingold-Prehlog rules states that the highest atomic number should
> have the highest priority i.e. lowest number.
>
> Did i miss anything?
>
> Best regards,
> Frederico Teixeira Silva.
>
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