What does "ht" mean?

ChemAxon a3d59b832c

07-04-2008 07:53:22

Quote:

I have a question regarding chemical structures created with "Marvin". Many of the chemical structures sited by the US National Library of Medicine (http://chem.sis.nlm.nih.gov/chemidplus/) "ChemIDplus Advanced" include the superscript notation "ht". What does this mean? What is "ht"? For example, CAS Number 9003-07-0 (polypropylene). What does the "ht" stand for? Thank you very much for your support.

"ht" stands for head to tail connectivity of polymer structures. You can find more explanation in the following help page:

http://www.chemaxon.com/marvin/help/sketch/sketch-basic.html#polymers

Best regards,

Szabolcs