Based on the direction of twist of the following groups, assign an R or S orientation. H HO .C CHS NH I Br P b. a. [Select] [Select] C. [Select] > CI b. OH L Br CH C. B3
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![Based on the direction of twist of the following groups, assign an R or S orientation.
H
HO
.C
CHS
NH
I
Br
P
b.
a.
[Select]
[Select]
C.
[Select]
>
CI
b.
OH
L
Br
CH
C.
B3](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F563973ca-a429-4147-a10a-25ea083c45b3%2F5d250dea-88dc-4903-b45d-b7f78e24db6f%2F4794g1y_processed.jpeg&w=3840&q=75)
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- ?.? Corb. Acd + Alcohal H2S04> 2. wheh Calberylk Acıd E alcohal makeWhich of the following systems are conjugated?Provide the missing starting material or reagent(s) for each reaction. mCPBA O'Pr 'Et f. a. OH OH racemic b. C. d. 1. mCPBA 2. cat. H₂SO4 H₂O 1. mCPBA 1. mCPBA 2. 2. OEt OH racemic OH OEt racemic g. h. MeO EtLi OH OH racemic MeO HO OH racemic OH racemic racemic
- Question in photoPlease draw the full mechanism using curved arrow formalism. H₂CO cat. AICI3. HCIThe purine heterocycle occurs commonly in the structure of DNA. a. How is each N atom hybridized? b. In what type of orbital does each lone pair on a N atom reside? c. How many a electrons does purine contain? d. Why is purine aromatic? purine