Title: Terminology and nomenclature
of macromolecules with cyclic structures
Chaiman: W. Mormann
Baron, R.B. Fox,
A. Fradet, K.H.
Hellwich, K. Horie,
J. Kahovec, P.
Kubisa, E. Maréchal,
I. Mita, R.F.T.
Stepto, J.L. Schultz,
and E.S. Wilks
Completion Date: 2008 - project completed
Cyclic macromolecules are widespread in nature, from cyclic DNA
to macrocyclic molecules in liquid sulfur. In addition, cyclic forms
of many classes of synthetic macromolecules have been prepared,
for example, polysiloxanes, nylons, polyesters, polystyrene. Further,
within the last decade, macromolecules of more complex architectures,
containing threaded cyclic structures have been synthesized. Examples
are catenanes (olympic-ring structures), rotaxanes (threaded rings
on linear chains) and other types of structure, such as, polyrotaxanes
and calixeranes. Polymers with such types of complex molecular structures
are now finding applications as functional polymeric materials,
for example, as catalyst supports, charge carriers and biologically
No systematic structure-based nomenclature
exists, even for the simplest type of cyclic macromolecular structure,
the regular cyclic macromolecule. The present project would correct
this omission and extend considerations irregular cyclic macromolecules
and, importantly, to the more recent, complex molecular structures.
Terminology will also be developed to classify the types of cyclic
macromolecular architectures which now exist.
Several nomenclature schemes have been considered and discussed
amongst the Working Party and at the Commission's Meeting in Berlin
(August 1999). These schemes will now be unified and discussed by
the task group.
Dec 2006 - A manuscript is being prepared for publication
in Pure Appl. Chem. A draft is submitted to public review
comments until 31 May 2007.
> see provisional recommendations
Feb 2008 - Project completed - IUPAC Recommendations
published in Pure
80(2), 201-232, 2008.
Last update: 18 Feb 2008