Chemical Forums

Chemistry Forums for Students => Organic Chemistry Forum => Topic started by: dubz on January 25, 2014, 10:19:05 AM

Title: {drawing organic compound}
Post by: dubz on January 25, 2014, 10:19:05 AM
Hi Guys!  I'm still an O-chem student and i'm having a problem in drawing this compound:

1-(2-methylcyclopropyl)propyne

i can't seem to draw it right..can anyone help me with this?  thanks in advance.

Mod Edit: actual useful title
Title: Re: Can anyone help me with this?
Post by: Borek on January 25, 2014, 10:24:21 AM
Show what you did so far, even if it is wrong.
Title: Re: Can anyone help me with this?
Post by: dubz on January 25, 2014, 10:29:21 AM
(https://www.chemicalforums.com/proxy.php?request=http%3A%2F%2Fi43.tinypic.com%2F34ep1s7.jpg&hash=ace012b90210250349621857e07bf9ab58f1ffc3)

that's what i've done using ChemSketch but it gives a different name..
Title: Re: Can anyone help me with this?
Post by: discodermolide on January 25, 2014, 10:37:54 AM
The name you gave suggests that propyne is the parent chain.
So start there.

CC#C[H]
Title: Re: Can anyone help me with this?
Post by: dubz on January 25, 2014, 10:43:48 AM
well, that's what i did but Chemsketch program named it otherwise.. :(
Title: Re: Can anyone help me with this?
Post by: discodermolide on January 25, 2014, 10:46:34 AM
Starting with propyne see where you can add the cyclopropylmethyl group.
Title: Re: Can anyone help me with this?
Post by: dubz on January 25, 2014, 10:58:21 AM
well i did some more variations but still nothing..take a look

(https://www.chemicalforums.com/proxy.php?request=http%3A%2F%2Fi43.tinypic.com%2F2dri46.jpg&hash=26a84a88b8488120cb7442281fd6c89b03f3b30e)

(https://www.chemicalforums.com/proxy.php?request=http%3A%2F%2Fi39.tinypic.com%2Fi6gsua.jpg&hash=bf06e79879638d07605041b607f3c80c9fab9c63)

i don't know what's my mistake :(
Title: Re: Can anyone help me with this?
Post by: discodermolide on January 25, 2014, 11:00:50 AM
The second structure is correct.
In the first one you attached the cyclopropylmethyl group to the wrong carbon atom.
CC#CC1C(C)C1

1-methyl-2-(prop-1-yn-1-yl)cyclopropane
Title: Re: Can anyone help me with this?
Post by: dubz on January 25, 2014, 11:07:28 AM
but i was looking for 1-(2-methylcyclopropyl)propyne ..Chem Sketch gave me a different one..are they the same?
Title: Re: Can anyone help me with this?
Post by: discodermolide on January 25, 2014, 11:13:06 AM
Yes they are the same. These are from ChemDraw.
Title: Re: Can anyone help me with this?
Post by: dubz on January 25, 2014, 11:15:12 AM
okay, thanks a lot man..still need to study more about this stuff. gonna post some more questions soon :D
Title: Re: Can anyone help me with this?
Post by: discodermolide on January 25, 2014, 11:18:01 AM
No problem