Question

2. Which of the choices below correctly ranks the groups in terms of priority in the RS system? -CH2CH=CH2 -CH=CH2 -CH2C-OH -CH2OH Ans. - @@@@@@@ NWAW MNNNM APAwwNN NW 3. (20 pts.) Identify the relationship between the molecules in each of the following pairs by writing the CAPITAL LETTER of the best answer. You may use letters more than once and/or not at all. (A) identical compounds (B) enantiomers (c) diastereomers (D) none of these Ans. COOH Htc НЕСІ Ans. нон HO HOOC Fisher projection но н HOH HOH HOH OH --OH Ans. Ans. нон HOH HO H нон
can someone help with orgo homework 2 and 3 please. currently I think 2 is A.

for three I have

A D

B C

thanks!!!!

Answer 1

►j cohn, angoid and prelog developed a method com can be used to designate the configuration of chidal centde , 2 The Fous different atoms og groups of atoms attached to chizal carbon atom are assigned a sequence of priority acc. to the following Set OF Sequence Jules V ! 2F the four atoms, directly attached to asymm. retaic carbon atom, are all diffesent the paiosity depends on the io atomic numbeo The atom of higher atomic numbeo gets higher priority If Rule li) fails to decide the aclative paioaity of two groups it is determined by similara comparison Of next atoms in the group.and so on. rij A doubly og Loiply bonded atom is considered equivalent to two or thaee such atoms, but two od three atoms, if attached actually, get paiodity oved doubly og taiply bonded atom. 1 ij af paiosity Sequence 1+2+3=>4 is in clockwise direction, then assigned 'R' configuration V If priority. Sequence 1+2+3+4 is an anticlock. acerse direction then assigned 'S' configuration

2.2; Llhich of the choices below corectly onks the coups in tears of priority in the RS Systeme -OH -CH-CH=CHY -CH=CH -CH-OH ano.cc JL Chle can': (6) Waite > - 14) - H o , .-.-* : -o-P _4 -C-C-W this Head Hu) #c monnes) Ho-c -0- -c 3-4 0 ciocctly e ekly detached LO aleached H and carbon and H . c directlyo katched to oxygen cdirectly attached to Carbon which in tuono → Therefore option A is correct. 0.3 identify the Jelutionship between the molecules in each of the following park u fiast ce determine Rand S configuration of ecich molecules ; if the configuration is same CRR) 07 (S, S) Then the two poias de identical If configuration is opposite then itg enantiomer

COOH 2nd exchange HOP.H@ Hot Clee Istexchange OH - > o che Hinnychy --> COOH COOH K SH (4th group in plane Jequire Ecoso TE 1-23 !' clockwise) > R-configuration -COOH exchange) et's ® >> 1+2+3 clockwise CR-configuration) 5 Both have(RAR) configuration, Therefore they are identical (A) Hel This Ecoo que Superimposable minzor images of each other V Theocreac Lhe- Il convents to Fischer Rotation CHE Robot CH CHS 90s. CAH identi ath 11 он, сна ☺ Hrow 0 0 OHC Roma Sou R 4th gopon Wedge 5 molecules have opposite configuration at Chical centoes. Therefore they are enantiomcas (B! Core® ob Ecevo molecules are diastereomers C), one 9R c hisal centachave some configuration and othea 4th paicity gopon Wedge) have diff.confi.