Question

Arrange the following weak bases in order of expected increasing stability. Η Ο HH H-C-0- H-0-0- H-0- H I Η Η II III a. (least stable base) II < I < III (most stable base) b. (least stable base) I < III < II (most stable base) c. (least stable base) I < II < III (most stable base) d. (least stable base) II IIII (most stable base) e. (least stable base) III <I < II (most stable base) f. (least stable base) III < II < I (most stable base)

Answer 1

TNP Arrange the following weak bases in order of Expected increasing stability: o и 10: H H o O H- c- c- H-c-c-1 H-0-5-0 4 H ;0: И (1) (5) Ethoxideion clul a letate ion Hydrogen sulphate Note. As the no of resonance structure in the base into molecule (base) increases the stability of the ions intreasy. *1) cte Resonance structure of alefete ion chę -2-8 رعه - The acesafe ion will shows the two resonance structure, 0:0 :01 C. HC-CO 3 HC - Có 3 RIS-. Ris-I * 2] Resonance structure of Ethoxide ion (He-cu-o: HC-04-039) 3 - the ethoxide ion will not show any resonance structure H C <-- I 1 и No Resonance structure

INP 2 3] Resonanie structure of Hydrogen sulphate! -(hsoo): the Hydrogen sulphate will shows the three resonance 4) Com :0-=0 <> H-=-== 0 structures :0; = ༡ R. S- R.S-11 Risti stability sl.co No of Resonance structure Anion o © H stable 1) of Hd C и 4 H © No (zero) least stable T 4-C - И и 10: 11 3 most stable M H-O-Ś - 0 0: stabilility order is { I < 0 option. A и и 4 10: 11 © W-C-f-: 1 H 4 < H-c-c-o: < H-ös ösuco :ö: 4 (1) ( ) ſ < I < option-A is correct answer