please answer and explain all! MBLING mendation CEM 251 Summer 2016 Practice Exa

Question

please answer and explain all!

MBLING mendation CEM 251 Summer 2016 Practice Exam 1. .(page 6) apts each, 18 total points) 14. For the above four sttuctures (A, B, C&D;) a) Which one is (IS, 2R)-1 chloro-2-methylcyclohexane? pts by which twa may be present in a bottle labeled cin-1 chloro 2 methylcyclobexane? c) Which one is identical to X? 2 pts. dj Which one would be mixed with B form a racemic mixture? Answer e) Which one has the same melting point as A? Answer n Which two are diastereomers of D? g) If Chas a specific rotation of ()10, which one 2 pta must have a specific rotation of (-)10n

Explanation / Answer

For the given four structures,

First assign the configuration to each chirl center in the molecule folowing the priority rule. A higher atomic weight gets higher priority. H gets the lowest priority in both.

a) The one with (1S,2R)-1-1chloro-2-methylcyclohexane = C

b) With cis-1-chloro-2-methylcyclohexane = C and D [assigned based on the chair conformation of ring]

c) Identical compound to X = A [both have same configuration (1R,2R)]

d) One which form racemix mixture with B = A [B has 1S,2S configuration and A has 1R,2R configuration]

e) Same melting point to A = B [enentiomers have same properties]

f) Diastereomers are = A and B [D has 1R,2S configuration is diastereomeric with A and B]

g) C with specific rotation +10 degree, then one with -10 degree specific rotation = D [both an enantiomers of each other]

Related Questions

Navigate

• Browse (All)
• Browse P
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.