[pigwiddeon]

Hello,

I have a question. Lets say we have isopentane and Cl2 in a substitution reaction. How many different Carbon atoms can chlorine atom bond with? All five or can it substitute with a hydrogen that bonded to methyl brach?

It is an easy question maybe but please answer that is really important for me.

Thanks for your consideration.

[spirochete]

Your question is not clear. It is a substitution reaction, so chlorine can replace any hydrogen bonded to carbon with a chlorine.

[zsinger]

I believe your saying one in the same thing.  It depends on where the functionality is in your starting material, but yes, in theory, you could substitute any of them through careful synthetic planning.  Read the Wikipedia article about "synthons", proposed by E.J. Corey, and widely used today in planning a synth which is multistep.  Also, read up about functional groups…..that might take you a lifetime .
     Cheers         
            -Zack