Blog

The reaction shown (reaction 1) below is a so-called semipinacol rearrangement. Silver nitrate is added to the reactant in order to precipitate silver iodide and produce a carbocation. Draw the most stable chair conformation of the starting material on your scratch paper and answer the following questions. After the formation of the initial carbocation, a rearrangement takes place. The migrating group or atom must be anti to the leaving group (the bond containing the migrating electron pair will be drawn parallel to the carbon-iodine bond in your chair conformation). Would you expect a hydride shift or a ring contraction to occur? [rearrangement] Which of the following (A-D) depicts the expected major product of reaction 1? [product1] The outcome of the reaction discussed in this problem is highly dependent on reactant stereochemistry. Consider reaction 2 (shown below) and answer the following questions. In the most stable chair conformation of the reactant (tert-butyl is equatorial), is there a migrating group (hydrogen atom, alkyl group, or C-C ring bond) that is anti to the leaving group? [anti] Which of the following (E-F) might reasonably form as the major product of the reaction? [product2]

Which of the following options represents the rate-determining transition state of the reaction shown below?

What type of assessment is used throughout teaching of a lesson and/or unit to gauge students’ understanding and inform and guide teaching?

Place the progression of the PBA lesson plan format in the correct order based on the gradual release of responsibility from teacher to student. 

What is a common term for instruction that starts with large group lesson or directions then breaks into smaller groups (guided, independent, collaborative/stations) and ends with a large group review or wrap up?

Which definition best defines the term “isotope”.

The Alien and Sedition Acts of 1798 consisted of______________________.

Calculate the heat involved to increase the temperature of a 5.00 g of sample of iron from 22 ⁰C to 76 ⁰C.  The specific heat of iron is 0.449 J/(g x⁰C); q=mcΔT

According to the Individuals with Disabilities Education Improvement Act of 2004, an individualized education program must include a statement of the student’s present levels of educational and functional ______.

The event that doubled the size of the U.S. and ended French presence in the North is commonly referred to as__________________.