It's like the C=C always have substituents. So , why it it on some examples the cis or trans or E or Z not used on the name of an alkene? My text doesn't explain
2007-09-30 13:47:10 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
cis and trans are older forms of designating geometrical isomers. E and Z are newer, and they are preferred in IUPAC names. The trouble with cis and trans is that in complicated alkenes, one doesn't know what is cis or trans to what. With E and Z, it's all spelled out. Naturally, you never use any of these with alkenes that lack geometrical isomers, like ethene, propene, or 1-butene.
2007-09-30 13:58:23 · answer #1 · answered by steve_geo1 7 · 1⤊ 0⤋
Oh my.. you just confused me even more with this question. Sorry don't know anything about this stuff but i do read all the other answers and am trying to learn new things from you. Good Luck
2007-09-30 21:12:48 · answer #2 · answered by robin r 6 · 1⤊ 0⤋