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R-9.2.1.1 An acyclic bridge is named as a prefix derived from the hydrocarbon name by changing the final "e" to "o". The locant of a double bond, is present, is indicated in square brackets between the hydrocarbon prefix and the ending "-eno", "-dieno", etc.
R-9.2.1.2 A monocyclic hydrocarbon bridgeother than benzene is named by the same prefix as used as a fusion prefix (see R-2.4.1) preceded by "epi-".Examples to R-9.2.1.1
Methano Ethano Propano Butano Etheno Prop[1]eno But[1]eno But[2]eno But[1,3]dieno
The bridge is assumed to have the maximum number of noncumulative double bonds consistent with the attachment to the fused ring and/or to other
bridges. The positions of the free valences are indicated by the relevant locants in square brackets directly in front of the bridge name.
R-9.2.1.3 Other cyclic hydrocarbon bridgeare named by prefixes derived from the unsaturated hydrocarbon name (see Table 20). Locants enclosed in square brackets are used as needed.Examples to R-9.2.1.2
R-9.2.1.4 An acyclic heteroatomic bridgeis named by the appropriate prefixExamples to R-9.2.1.3
.
R-9.2.1.5 Heterocyclic bridgesare named by prefixes derived from the corresponding heterocyclic compound name (see Table 23). Locants enclosed in square brackets are used where necessary.Examples to R-9.2.1.4
Epoxy Epithio Episeleno Epidioxy Epidithio Epoxythio Epoxythioxy Epoxyimino Epimino Diazano Diazeno Triaz[1]eno Phosphano Stannano Epoxymethano Epoxyethano Epoxyprop[1]eno
Examples to R-9.2.1.5
[3,4]Furano
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