of ring atoms, linked together as an unbranched chain and connecting two bridgeheads
or junctions, but not itself containing any bridgehead
or junction, is termed an atomic ring-sector. A bond linking together directly two
bridgeheads or junctions is termed a bond ring-sector.
IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by
A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997).
XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic,
J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8. https://doi.org/10.1351/goldbook