This app explores the factors that determining whether a chemical system will undergo an SN1 or SN2 nucleophilic substitition reaction. The added complexity of competition with elimination reactions is also addressed. Organic chemistry students seeking help on the topic of nucleophilic substitution will find the included learning material both conscience and effective. In the explore tab, users can enter the conditions of a reaction and the app will let them know the most probable reaction pathway. The app is rounded out with a set of practice questions for students to test their understanding.

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