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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- The 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? purineis this z or E？？ If it is E. please in details explain why cycloproyl is greater than OH group？？？Please draw the full mechanism using curved arrow formalism. H₂CO cat. AICI3. HCI
- draw HNMR label Ha,Hb, etc on molecule also CI5. Draw the structures of A and B, and use the curved arrow formalism to show the Trensproduct is med bond making and bond breaking that occurs in the formation of A and B through the following series of reactions. Note: Sodium hydride (NaH) is a strong base. NaH A diethylether Use the curved arrow formalism to show the bond meli( plz give detail step by step mechanism ) dont copy plz