absolute configurations of the two stereogenic centres (i) and (ii) in the structure below respectively, are: OR and R S and R OR and S OS and S Onone of the above
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- Identify the relationship between the following pairs of structures, then state whether they are enantiomers, diastereomers or identical. Help me answer iv., v., iv., vii. (last 4 sub part)Give the major organic product(s) of the following. Include stereochemistry when applicable. 1) Nal Br a) 2) NACN, acetone I) NAOC(CH,),, heat b) Br 2) BH; THF; 3) H,O,. NaOH(aq) 1) HCI 2) KOCICH,), heat 1) NAOH, heat Br 2) МСРВА 1) KOC(CH,), heat Br e) 2) H,0"Urgent explain in details In all 12 structures, highlight the main steric interactions that could be contributing to the energy difference between conformers
- Question 5 of 50 -/1 > View Policies Current Attempt in Progress When (S)-2-bromopropanoic acid [(S)-CH3CHBPCO,H] reacts with concentrated sodium hydroxide, the product formed (after acidification) is (R)-2-hydroxypropanoic acid [(R)-CH3CHOHCO2H, commonly known as (R)-lactic acid). This is, of course, the normal stereochemical result for an SN2 reaction. However, when the same reaction is carried out with a low concentration of hydroxide ion in the presence of Ag,0 (where Ag* acts as a Lewis acid), it takes place with overall retention of configuration to produce (S)-2- hydroxypropanoic acid. The mechanism of this reaction involves a phenomenon called neighboring-group participation. Explain why there is a net retention of configuration when Ag* and a low concentration of hydroxide are used. The reaction is a two step process. The missing product produced by step 1 is: (Use single up and single down wedges to show the stereochemistry at the chiral center.) Step I Ag+ H Br CH,14. a) What isomerism is shown by butenedioic acid and why? b) Differentiate between racemic mixture and meso compound.Compare the physical properties of the three stereoisomers of 1,3 dimethylcyclopentane. Question : Characterize a solution of each of the following as optically active or optically inactive: pure A; pure B; pure C; an equal mixture of A and B; an equal mixture of A and C.?
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- Assign configuration to each stereocenter in the compound below ..give answer all sub parts if you not then don't give..I will give you upvote....give solution in detailedQuestion 2. a) Methoxy ethylene (H2C=CHOCH3) and propanal (CH3CH2CHO) are constitutional isomers. State the wavenumbers and bonds associated to differentiate these isomers as in IR table provided.(a) Are compounds B–D identical to or an isomer of A? (b) Give theIUPAC name for A.