R-2.2.1 Hydrocarbons The saturated unbranched acyclic hydrocarbons from C2 to C4 are named ethane, propane, and butane (see R-9.1, Table 19(a)). Systematic names of the higher members of
this series consist of a numerical term (see Table 11), followed by "-ane" with elision of a terminal 'a' from the basic numerical term. The generic name for saturated acyclic hydrocarbons
(branched or unbranched) is "alkane". The chain is numbered from one end to the other with arabic numerals.
Examples to R-2.2.1
R-2.2.2 Homogeneous hydrides other than hydrocarbons or boron hydrides
R-2.2.3 Heterogeneous hydrides
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