R-0.2.4.2 Lowest set of locants: the set of locants, which when compared term by term with other locant sets, each in order of increasing magnitude, has the lowest term at the first point of difference; for example, the locant set 2,3,6,8 is lower than 3,4,6,8 or 2,4,5,7.
Primed locants are placed immediately after the corresponding unprimed locants in a set arranged in ascending order; locants consisting of a numeral and a lower-case letter are placed immediately after the corresponding numeric locant.
Italic capital and lower-case letter locants are lower than Greek letter locants which, in turn, are lower than numerals.
Examples to R-0.2.4.2
2 is lower than 2
3 is lower than 3a
8a is lower than 8b
4' is lower than 4a
4'a is lower than 4a'
R-0.2.4.3 Bonding number: see R-1.1.
Example to R-0.2.4.2
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