http://cd1.emb.hkedcity.net/cd/science/chemistry/resource/naming/images/helogeno_cpd/snt3aq2_1.gif
上面ge可唔可以係3,5-dibromo-3-chloro-2-propyl-4,4,5-trimethylhex-1-ene
定係一定要3,5-dibromo-3-chloro-4,4,5-trimethyl-2-propylhex-1-ene?
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仲有如果有2個C=C係咪一定要在but,hex等後面加上'a'?
如penta-2,4-ene , hexa-2,4-ene ?
thx!!!!!!!!!!!!!!!