In article <jdepaula-010993171826 at s205.stokes.haverford.edu>, jdepaula at haverford.edu (Julio C. de Paula) writes...
>obtaining
>coordinates for the structures of metalloporphyrins, metallochlorins,
>chlorophylls, and other tetrapyrroles. Does anyone know of a databank that
>carries files in some known format (such as PDB)? If so, is the databank
>accessible via Gopher, FTP, etc. for downloading?
The database you want is Cambridge. Unfortunately, it is not free. There
is even a category call 'porphyrins, corrins' which would contain many
compounds you would be interested in.
For carbon containing organic and organometallic compounds there is:
Cambridge Structural Database
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