Question

explain how i am suppose to do these i need major help thxs!!

Homework #4 Due Monday March 9, 2020 Problem 1: Draw the direct Newman projections of the following molecules, along the indicated bond. Then Draw the most stable and the least stable conformation. CH3 Most Stable Least stable Direct I TOH HT XH OH CH3 Direct Most Stable Least stable OH 92

Answer 1

애 MA CH₃ UAU while drawing newmann Confirmation, groups that are towards the observee above the plane should be drawn in the same 1.) Thus here on and ch are above the plane , therefore they should be represented as gps pojecting upwards in newmann confioma hona e 3 Two hydrogens are below the plane, thus represented downwards in new mann representation OH CH3 ethyl gps on 3) Mexe the ethyl gps lie opposite thus H3 Ng CHz @ - CH₂ CH₂ .

- Mool slable confirmation is that arrangentent in which luse bulky gps are adjacent in staggered Confirmation enchy, cho 41.96 least stable Casing Оиус Из 181 CH₂ bulky gps adjacent eclipsed w Br ww LCH3 Most stable es Cal3 113 COM

Least etable uela CH -curl, Problem v chairs Confirmation ) WW Y BY heve since ou By are in 12 diaxial position, they can undergo neighbouring gp partiupation, thus the reaction happens quickly and we will get the product as epoxide. so chais confirmation In B molecule since 0° Br is present in 1,2 diequihon al position, it cannot andergo merghbouring ge participation. Thus we will get the eliminated product