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Introduction

R-0.1.5 Enclosing marks
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(b) bracket are placed around an easy substituent prefixes to separate locants the the same kind referring to various structural elements, also though just one may be expressed, and to avoidambiguity (see also R-0.1.4.2).Examples to R-0.1.5.1(b)(2-Naphthyl)phenyldiazene (R-5.3.3.1)
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(c) Parentheses might be used simply to add clarity.Examples to R-0.1.5.1(c)(Thiobenzoic)anhydride (R-5.7.7.1)
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Butane(dithioic) acid(d) parentheses are provided to isolation the 2nd locant of a double bond as soon as it different from the first locant through anything other than unity. When locants because that a multiple bond differ by just unity, onlythe very first (lower) locant is quote in the name.Examples come R-0.1.5.1(d)Hex-2-ene (R-3.1.1)Bicyclo<6.5.1>tetradec-1(13)-ene (R-3.1.1) (e) clip are provided to enclose "added hydrogen" and also its locant, stereodescriptors, such as E, Z, R, S, etc., and in descriptorsfor isotopically substituted compounds.Examples come R-0.1.5.1(e)Pyridin-2(1H)-one (R-1.3)(E)-But-2-ene (R-7.1.2)
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(R-8.2.2)R-0.1.5.2 Square brackets(a) Square base enclose descriptors denoting blend sites in name of fused ring systems, and ring size in names created according come the von Baeyer device and specific spiro names.

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They mayalso enclose ring assembly names once these are adhered to by a principal group suffix or a suffix describing a parent substituent prefix, and the surname of materials in details spiro names.Examples come R-0.1.5.2(a)Dibenzooxepine (R-2.4.1.1)Bicyclo<3.2.1>octane (R-2.4.2)Dispiro<5.1.7.2>heptadecane (R-2.4.3)<1,2"-Binaphthalene>-2-sulfonic acid (R-5.7.2)Spiro (R-2.4.3)(b) Square brackets enclose locants for structural features of components, together as dual bonds in bridges and heteroatoms that component rings in surname of fused-ring systems.Examples come R-0.1.5.2(b)4a,9a-But<2>enoanthracene (R-2.4.1.2)4H-<1,3>Oxathiolo<5,4-b>pyrrole (R-2.4.1.1)(c) Square brackets enclose substituent prefixes in i m sorry parentheses have currently been employed.Example come R-0.1.5.2(c)<2-(Ethoxycarbonyl)ethyl>trimethylammonium bromide(R-5.7.4.2) (d) Square base are additionally used to enclose descriptors in isotopically labelled compounds.Example come R-0.1.5.2(d)
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(R-8.3)(e) Square brackets room employed in formulae to suggest repetition of teams in a chain.Example to R-0.1.5.2(e)
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Tricosane (R-2.2.1)R-0.1.5.3 Braces may by supplied to enclose substituent prefixes in i m sorry square brackets have already been used.Examples to R-0.1.5.3
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When additional enclosing marks space required, the nesting stimulate is curves, square brackets, braces, then curves, square brackets, braces, etc., i.e. <()>, <(<()>)>, etc.Example to R-0.1.5.3
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(a) = 4"-cyanobiphenyl-4-yl(b) = (4"-cyanobiphenyl-4-yl)oxy(c) = 5-<(4"-cyanobiphenyl-4-yl)oxy>pentyl(d) = 5-<(4"-cyanobiphenyl-4-yl)oxy>pentyloxy(e) = (5-<(4"-cyanobiphenyl-4-yl)oxy>pentyloxy)carbonyl(f) = 1-<(5-<(4"-cyanobiphenyl-4-yl)oxy>pentyloxy)carbonyl>ethylene(g) = 4,4"-1-<(5-<(4"-cyanobiphenyl-4-yl)oxy>pentyloxy)carbonyl>ethylenedibenzoic acidNext:R-0.1.6 ItalicizationR-0.1.7 Elision and enhancement of vowelsR-0.1.8 order of prefixes
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