[helper]

hello,

Is it right to name trans-1-phenylpropene?
 why do we use this name and not choosing the phenyk to bethe main chain and the propene group as a subsituent?

*I had a question of sinthazing a molecule and that was the nam that was given. and as we learned we should not name the molecule that way. may the reason be becase they want to emphsize the trans ?

[Hunter2]

Here the names can be used

http://webbook.nist.gov/cgi/cbook.cgi?ID=C873665&Mask=8

[helper]

thanks:)

[Archer]

IUPAC name is (1E)-prop-1-en-1-ylbenzene

See chemspider for more trivial names.

http://www.chemspider.com/Chemical-Structure.221082.html


1-phenylpropene does not describe the position of the double bond so you could be describing prop-2-en-1-ylbenzene (allyl benzene).

If you have cis or trans prefix then you can assume that the double bond isn't terminal. However if you are unsure of the exact isomer or you have a mixture of isomers then you can't use 1-phenylpropene as it is too ambiguous.