Pino,

wp-content/clorurometile.sdf
is a binary file
I do not know the format, it does not seem to be gzipped.

In any case, JSmol needs to be informed of binary files with a special file extension, see
http://wiki.jmol.org/index.php/Jmol_JavaScript_Object#Reading_binary_files

Have you tried to open the file in Jmol application?