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- 12. Nirogenase is an enzyme that converts the remarkably stable triple bond in N2 into a usable form. It uses an iron sulfur cluster comprised of iron and the sulfur atoms of several active site cysteine residues. Based on your knowledge of Biochemistry what is the enzyme doing to effectively carry out this reaction? a) stabilizing the transition state for the reaction by hydrophobic effects b) stabilizing the ground state for the reaction by hydrophobic effects c) stabilizing the transition state for the reaction by metal ion catalysis d) stabilizing the ground state for the reaction by metal ion catalysis e) all of the above5. Abstraction of a hydrogen atom from 3-ethylpentane can yield three different radicals, depending on which hydrogen atom is abstracted. Draw all three radicals and rank them in order of increasing stability.Which of these products is the result of a hydride shift occuring during the substitution reaction of aqueous 2-chloro-3-methylpentane? CH3CH2CCH2CH3 || CH2 CH3CH(OH)CH(CH3)CH2CH3 CH2=CHC(CH3)=CHCH3 CH3CH=C(CH3)CH2CH3 CH3CH2C(CH3)CH2CH3 | OH
- H₂N CO₂H H₂N. CO₂H GABA 2 CO₂Et Modify the structures given below to draw all eight possible allylic bromides that can be formed when compound 2 undergoes allylic bromination, considering all possible regiochemical and stereochemical outcomes. You can use the single bond tool to add/remove pi bonds. o o o oर Edit Drawing5. Consider the reaction below: ÇI CH3 CH CHCH3 CH, CHCHCH, + ci CH3 (a) State the type of bond cleavage involved. (b) Compare the stability of the product to (CH3)2CHCH;CH2 and explain.4. The following molecule was subjected to two different conditions. Provide the product in each case. 1. Mel, K₂CO3 2. Ag₂O, A mCPBA, Δ
- 17. Identify the major product of the following reaction. Br IN соз Br Br2, FeBr3 Br ? Jos jos Br || IVAdd Ink to Ink to Drawing Canvas Pen Shape Math Comvert Insert CHICHOBENICOCE 2 3C S 13 15 16 (Complete the mind map given Observation: veddish brown of Brs deolounzed -Br Br CH,CI, Br2, H20 Cl2, CIA HBr H;C H,O, H,o H2, Pt conc. H,SO, H2C CH CHS он dilute KMno . OH- heat 4+ CH2 CH2 HCI + mn Oz HCI, H,O Her, CH,0OCH, observation: purple cSlour Br, CI, Cl,, H,O dikúte H, So, 5 yvees ENG USThe cis and trans 2-butene stereoisomers have the following rate constant values associated with the electrophilic addition of water in an acid medium at the same temperature. what is the difference between the two values through the energy profile of each reaction. CH3 H,O productos H+ H3C k = 3.51 x 10- M's1 H3C CH3 H,0 > productos H+ k = 8.32 x 10®M's1
- Compounds P and Q can undergo a Diels-Alder reaction to form two regioisomeric products R and S as shown in Figure 5. OMe O C8H12O2 R C8H12O2 S Figure 5 Draw the chemical structures of regioisomeric compounds R and S. Using possible resonance contributors of P and Q predict which of the two regioisomers will be favoured in the reaction. Using curly arrows, draw the mechanism for the reaction of P and Q to form the dominant regioisomer you have predicted in your answer to part (ii) above.2. Carbenes undergo cyclopropanation reactions with alkenes. It is known that the carbene approaches the alkene in a non-linear rather than a linear fashion. Provide a depiction of the relevant HOMO and LUMO orbital interactions that explain this preference for the non-linear trajectory. Linear H H H H VS. H-C. Non-Linear (Favored) H₂ H H HPractice Problem 03.46d N' 3.46d1 For the reaction given below, draw a mechanism (curved arrows) and then predict which side of the reaction is favored under equilibrium conditions. H. CH3 H. CH3 Edit H,C H,C H3C H,C
