[cms2002]

Greetings!  We began discussing IUPAC nomenclature of alkanes in class today, and my professor put a compound on the board for us to consider.  I am completely stuck trying to figure out it's name.



The closest I can come up with based on what I currently know is 1-methyl-1-pentylcyclopentane, but the cyclopentane isn't the longest chain.  The longest chain seems to be a heptane, but then what sort of attachment is that at the #2 carbon?

If it were this:


Then I would call it 2-cyclopentylheptane, but I have no idea what to do when the ring is attached like in the first picture.  Am I anywhere close?

[azmanam]

you're right the first time

1-methyl-1-pentylcyclopentane

For simple rings like that, the ring is the parent.

(your name for the second is also right).

[Fridushka]

As you can see in the 2^nd picture, as if it is hanged from the heptane chain, but in the first u can't consider the upper one as a whole chain..so can u figure out the difference?!

The closest I can come up with based on what I currently know is 1-methyl-1-pentylcyclopentane, but the cyclopentane isn't the longest chain.  The longest chain seems to be a heptane, but then what sort of attachment is that at the #2 carbon?

So you can't consider it as an heptane...since it is pentane attached to the cyclohaxane..

hope it is clear
Good Luck