Re: CCL:Carbohydrate stereochemistry

     In carbohydrate nomenclature:
 gg - gauche, gauche
 tg - trans, gauche
 gt - gauche, trans
      Definitions for these, as well as for the terms anti and syn, can be
 found at the excellent IUPAC stereochemical nomenclature site, the index for
 which can be found at:
 http://www.chem.qmul.ac.uk/iupac/stereo/cont.html
      Basically these are descriptors for the relative stereochemistry in
 polycyclic compounds, such as oligo- and polysaccharides.
 HTH, Matthew Schlecht
 *********************************************************
 ----- Original Message -----
 From: "Ibrahim M.Moustafa" <im17_at_st-andrews.ac.uk>
 To: <chemistry_at_ccl.net>
 Sent: Tuesday, December 09, 2003 9:22 AM
 Subject: CCL:Carbohydrate stereochemistry
 > Dear CCl users,
 >
 >     Could someone help me and explain what is meant by the following terms
 > used in the description of the stereochemistry of carbohydrates: gg, tg,
 > gt, anti, syn.
 >
 >    I'd really be grateful for your help.
 >
 >    regards,
 >   Ibrahim
 >
 > Ibrahim M.Moustafa
 > Centre for Biomolecular Sciences
 > St-Andrews University
 > North Haugh, St-Andrews
 > Fife KY16 9ST
 > Scotland, U.K.
 >
 > Tel.       +44 (0)1334 467257
 > Fax       +44 (0)1334 462595
 > e-mail:   im17_at_st-andrews.ac.uk
 >
 >
 >
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