What are the structures of.....?

#a.# #"propylene;"#
#b.# #"2,3,4-trifluoropropane;"#
#c.# #"2,2-Dimethyl-4-ethylheptane;"#
#d.# #"1-Bromo-2-iodoethyne;"#
#e.# #"cyclopropane;"#
#f.# #"1,3-dibromobenzene;"#
#g.# #"4-ethylheptan-2-ol?"#

2 Answers
Apr 19, 2017

#a.# #"Propene or propylene"# #-=# #H_3C-CH=CH_2#

Explanation:

#b.# #"2,3,4-trifluoropentane"# #-=# #"H"_3"CC(H)(F)C(H)(F)C(H)(F)CH"_3#

#c.# #"2,2-dimethyl-4-ethylheptane"# #-=#

#"H"_3"CC(CH"_3")"_2"CH"_2"C(C"_2"H"_5)"HCH"_2"CH"_2"CH"_3#

#d.# #"1-bromo-2-iodoethyne"# #Br-C-=C-I#. Is this correctly named?

#e.# #"cyclopropane"#

en.wikipedia.org

#f.# #"1,3-dibromobenzene"#

sigmaaldrich.com

#g.# #"4-ethyl-2-heptanol"#

#"H"_3"CCH(OH)CH"_2"CH(C"_2"H"_5")CH"_2"CH"_2"CH"_3#

So how did I know how to do this? With the linear alkanes, I drew the parent chain FIRST: i.e. for a heptane derivative, I drew a seven carbon chain. I then numbered the chain, and put in the susbtituents at the named positions.

Apr 19, 2017

Here's what I get.

Explanation:

a) Propene

Propene

b) 2,3,4-Trifluoropentane

234F3

c) 2,2-Dimethyl-4-ethylheptane

22Me2

d) 1-Bromo-2-iodoethyne

1Br

e) Cyclopropane

Cyclo3

f) 1,3-Dibromobenzene

13Br2

g) 4-Ethylheptan-2-ol

4Et