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How can I know if the reagent I have will act as a( base) and attack a H or act as a (nucleophile) and attack a C atom?...is there any rules or something?

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closed as too broad by Buttonwood, Todd Minehardt, airhuff, M.A.R. ಠ_ಠ, NotEvans. May 12 '17 at 19:05

Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

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    $\begingroup$ A Reagent can act as a base when there is steric hindrance in the substrate or in the attacking Reagent by considering the thermodynamics of the reaction. We can further look at the possible attacks that can lead to a stable product. We observe these differences specially in substitution and elimination reactions. $\endgroup$ – Suraj S May 12 '17 at 18:14
  • $\begingroup$ related chemistry.stackexchange.com/questions/3959/… $\endgroup$ – Mithoron May 12 '17 at 18:17
  • $\begingroup$ This is much toooo broooad. Thorough answer wouldn't fit in a book. $\endgroup$ – Mithoron May 12 '17 at 18:52
  • $\begingroup$ Ask the question on a particular question, then we can help you out. $\endgroup$ – Pritt Balagopal May 13 '17 at 3:34
  • $\begingroup$ @PrittBalagopal chemistry.stackexchange.com/questions/74502/… $\endgroup$ – Salma May 14 '17 at 11:24