CHEM301 F08 CA11 key

CHEM301 F08 CA11 key - CHEM301, Fall 2008 Dr. Ruder 1 Class...

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CHEM301, Fall 2008 Dr. Ruder 1 Class Activity 11 key Electrophilic Addition Two molecules combine to form one product. Model 1: Electrophilic Addition 2 + 2 = 4 (eq 1) + Cl Cl Cl Cl eq 2 (C 6 H 12 ) (C 6 H 12 Cl 2 ) + H Cl Cl H eq 3 (C 6 H 12 ) (C 6 H 13 Cl) Questions 1. What term is used to describe the mathematical operation shown in eq. 1? Addition 2. Describe any changes that occur in the reaction shown in eq. 2. Compound A has a double bond while compound B has only single bonds. The molecular formula of A is C6H12, while the formula of B is C6H12Cl2 – thus an addition of two atoms of Cl occurred in the reaction from A to B. 3. What term might be used to describe the net reaction illustrated in eq. 2? (compare to eq. 1) Addition of two molecules has occurred to make one product. 4. Describe any changes that occur in the reaction shown in eq. 3. Compound C has a double bond while compound D has only single bonds. The molecular formula of C is C6H12, while the formula of D is C6H13Cl – thus an addition of two atoms (one H and one Cl) occurred in the reaction from C to D. 5. What term might be used to describe the net reaction illustrated in eq. 3? (compare to eq. 1). Addition of two molecules has occurred to make one product. 6. As a group come to an agreement on what is similar between the reactions shown in eq. 1, 2, & 3. Two things have been added together to make one product. Model 2: Mechanism of Addition Reactions Two mechanisms are proposed for the addition of reagents to an alkene. The mechanism shown in eq. 4 is called stepwise, while the mechanism shown in eq. 5 is called concerted.
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CHEM301, Fall 2008 Dr. Ruder 2 + H Cl Cl H eq 4 H + H Cl Cl H eq 5 H Cl Cl H Cl H transition state Concerted Intermediate trans. state 1 trans. state 2 Stepwise Questions 7. (a). In the first step of eq. 4, label the Nu and E Ө .
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This note was uploaded on 02/17/2011 for the course CHEM 301 taught by Professor Sahli during the Fall '07 term at VCU.

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CHEM301 F08 CA11 key - CHEM301, Fall 2008 Dr. Ruder 1 Class...

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