Question

vitamin D3 question. i do not understand the di and tri substituted

IV. ш D) IV A) I C) III В) II 14) Classify each alkene in vitamin D3 below (labeled I, II, III in the drawing). нопн.. п ш I )o4 A) I Disubstituted; II = trisubstituted; III= tetrasubstituted. B) I = Disubstituted; II = disubstituted; III= trisubstituted. CI = Monosubstituted; II disubstituted; III = disubstituted. D)D= Disubstituted; II = trisubstituted; III= trisubstituted 15) Which of the following statements is true about leaving groups? A) They form strong bases after reaction. B) All of the halogens are good leaving groups. C) becomes a stable anion or neutral species in solution after reaction. DJ Down a column of the periodic table, leaving group ability decreases. 5

Answer 1

14) Classify each alkene in vitamin D below (labeled I, II, III in the drawing). Correct option D A monosubstituted alkene is an alkene in which two carbon atom which are doubly bonded are bonded to three H atoms Similarly, a disubstituted alkene is an alkene in which two carbon atom which are doubly bonded are bonded to two H atoms HO . Again, a trisubstituted alkene is an alkene in which two carbon atom which are doubly bonded are bonded to one H atom other. For example H Н A) I = Disubstituted; II = trisubstituted; III - tetrasubstituted. B) I - Disubstituted; II = disubstituted; III = trisubstituted. Q1 Monosubstituted; II - disubstituted; III - disubstituted. D) - Disubstituted; II = trisubstituted; III - trisubstituted. R H monosubstituted alkene disubstituted alkene Where, R = any substitutent which is other than H disubstituted alkene trisubstituted alkene Trisubstituted with only one H atom HO Disubstituted with two H atoms Trisubstituted with only one H atom