R-2.3.1 Hydrocarbons R-18.104.22.168 The names of saturated monocyclic hydrocarbons are formed by attaching the prefix "cyclo-" to the name of the acyclic saturated
unbranched hydrocarbon with same number of carbon atoms. The generic name of monocyclic hydrocarbons is "cycloalkane". Numbering proceeds sequentially round the ring.
R-22.214.171.124 Unsubstituted monocyclic hydrocarbon polyenes having the maximum number of noncumulative double bonds and with a general formula of CnHn or
CnH2n+1 (with n greater than 6) are called annulenes generically. A specific annulene may be named as an
[n]annulene, where n is the number of carbon atoms of the ring. When n is an odd number, i.e., when the annulene has the general formula CnHn+1 the
extra hydrogen atom is denoted as "indicated hydrogen" (see R-1.3).
Examples to R-126.96.36.199
Examples to R-188.8.131.52
(Cyclodecapentaene according to R-3.1.1)
(Cyclonona-1,3,5,7-tetraene according to R-3.1.1)
R-2.3.2 Homogeneous hydrides other than hydrocarbons or boron hydrides
R-2.3.3 Heterogeneous hydrides other than heteropolyboron hydrides
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