[NTG-ppchtex] Your Help Please

Ton Otten a.f.otten at xs4all.nl
Fri Sep 24 11:23:13 CEST 2004


At 12:18 AM 9/24/2004, you wrote:
>Hello:
>
>I am trying to use ppchtex to draw Lewis electron dot structures for 
>molecules using ppchtex and am having trouble doing this.
>
>I was a subscriber to the ppchtex mailing list, but I recently left IBM 
>for a job in academics.
>I am hoping you could answer me directly, since I am trying to do use 
>ppchtex for a Chemistry examination I am writing.
>
>Description of the Problem
>----------------------------------
>Suppose I have CCl4.  The carbon atom is in the center and is surrounded 
>by 4 chlorine atoms.  I have no problem using ppchtex to do this.   But, 
>each Cl atom has 6 lone pair electrons around
>it like this
>    ..
>: Cl :
>
>How do I do this with ppchtex.  The electrons seem to always "fall" to the 
>central atom (Z0) of the ONE structure.  There doesn't seem to be any way 
>to put electrons around atoms other than the central atom with the ONE 
>structure.


Something like this. Every Cl-atom has to be a separate ONE.

$$
\startchemical
   \chemical[ONE,Z0][Cl]
   \chemical[MOV1,Z0,SB1357,SAVE][C]
   \chemical[MOV1,Z0][Cl]
   \chemical[RESTORE,MOV3,Z0][Cl]
   \chemical[RESTORE,MOV7,Z0][Cl]
\stopchemical
$$

$$
\startchemical
   \chemical[ONE,Z0,ED357][Cl]
   \chemical[MOV1,Z0,SB1357,SAVE][C]
   \chemical[MOV1,Z0,ED137][Cl]
   \chemical[RESTORE,MOV3,Z0,ED135][Cl]
   \chemical[RESTORE,MOV7,Z0,ED157][Cl]
\stopchemical
$$

Regards,

Ton

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       Ton Otten | PRAGMA ADE | email: a.f.otten at xs4all.nl
       Ridderstraat 27 | 8067 GH Hasselt | The Netherlands
       tel. +31 (0)38 477 53 69 | site: www.pragma-ade.com
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