What is the rate determining step in the acid -catalyzed addition of
water to 2-methylpropene?

Howdy schem-ga,

This University of Illinois at Chicago web page in Adobe Acrobat
format has the solution to your question.
http://www.chem.uic.edu/web1/232S2001/456MCA.PDF

(CH3)2C=CH2  +  H3O+   --->   (CH3)3C+  +  H2O

Here is an attempt at formatting the answer correctly.

                 +             +
(CH ) C=CH  + H O  ---> (CH ) C  + H O
   3 2    2    3           3 3      2

If you do not have the needed Adobe Acrobat Reader, you can download
it at no cost from Adobe.
http://www.adobe.com/products/acrobat/readstep2.html

Because of formatting issues, I suggest you look at the solution in
the PDF format through the link given above.

Scroll to question 6-36 on the document for the correct format.

If you need any clarification, feel free to ask.


Search Strategy

Google search on: "2-methyl-2-hexene" "2-methyl-3-hexanol" "BH3/THF"
://www.google.com/search?q=%222-methyl-2-hexene%22+%222-methyl-3-hexanol%22+%22BH3%2FTHF%22

Looking Forward, denco-ga - Google Answers Researcher