On Monday 20 April 2009 17:27:42 Helge Kruse wrote:

Hello,

I need to write some chemical strucutures in LaTeX and dont know, what is the best tools to do it. The structures are crown ether and cryptands. Yes, and I am unexperienced.

1. What would be the way to write a [18]crown-6

(http://en.wikipedia.org/wiki/Crown_ether) structure formula with PPCHTEX? 2) Is there any kind of repository, where I can take common structures and/or adapt these to the required structures?

Regards, Helge

I just came across your message from over a month ago... Here is my solution (ConTeXt):

\usemodule[chemic] \starttext % 18-Crown-6 \startchemical[width=fit,height=fit] \chemical[SIX,B5,-SB4,+SB6,Z4,MOV1][O] \chemical[SIX,B6,-SB5,+SB1,Z5,MOV2][O] \chemical[SIX,B1,-SB6,+SB2,Z6,MOV3][O] \chemical[SIX,B2,-SB1,+SB3,Z1,MOV4][O] \chemical[SIX,B3,-SB2,+SB4,Z2,MOV5][O] \chemical[SIX,B4,-SB3,+SB5,Z3][O] \stopchemical

% my discotic mesogene... \startchemical[width=6500,height=8000,top=2500,left=2500] \chemical[SIX,B5,-SB4,+SB6,PB:Z4,ONE,SB6,Z06,PE,MOV1][N,R] \chemical[SIX,B6,-SB5,+SB1,PB:Z5,ONE,SB7,Z07,PE,MOV2][N,R] \chemical[SIX,B1,-SB6,+SB2,PB:Z6,ONE,SB8,Z08,PE,MOV3][N,R] \chemical[SIX,B2,-SB1,+SB3,PB:Z1,ONE,SB2,Z02,PE,MOV4][N,R] \chemical[SIX,B3,-SB2,+SB4,PB:Z2,ONE,SB3,Z03,PE,MOV5][N,R] \chemical[SIX,B4,-SB3,+SB5,PB:Z3,ONE,SB4,Z04,PE][N,R] \stopchemical

\stoptext

Alan