5. Two frequently encountered alkenyl groups are the vinyl group and the allyl group H2c C=g—c H3C—Hc=c The vinyl group团乙烯基) The ally group(烯丙基) The Propylene group两丙烯基) CH2Cl -CH2Br IUPAC: Bromoethene IUPAC: 3-Chloropropene IUPAC: 3-Bromopropene Common; vinyl bromide Common; allyl chloride Common; allyl bromide (乙烯基溴) (烯丙基氯) (烯丙基溴)
5. Two frequently encountered alkenyl groups are the vinyl group and the allyl group. The vinyl group (乙 烯 基 ） The ally group (烯 丙 基 ） H2C C H H2C C H CH2 HC C H2 H3C The Propylene group (丙 烯 基 ） Br CH2Cl IUPAC: Bromoethene Common; vinyl bromide (乙烯 基 溴 ） IUPAC: 3-Chloropropene Common; allyl chloride (烯 丙 基 氯 ） CH2 Br IUPAC: 3-Bromopropene Common; allyl bromide (烯 丙 基 溴 ）
6. Designate the geometry of a double bond of a disubstituted alkene with the prefixes cis and trans Cl H Cl is-1. 2-Dichloroethene trans-1. 2-Dichloroethene How to do? F
6. Designate the geometry of a double bond of a disubstituted alkene with the prefixes cisand transCl H Cl H Cl H H Cl cis-1,2-Dichloroethene trans-1,2-Dichloroethene Br H Cl F How to do?
8.2A The(E)-(Z)System for designation alkene diastereomers Higher priority Br Higher priority H Higher priority (Z)-2-Bromo-1-chloro-1-floroethene (E)-2-Bromo-l-chloro-l-floroethene Higher priority H3C CH3 Higher priority、HaC CH3 >H CH3 Higher priority Z-2-Butene E)-2-Butene (cis)-2-Butene (trans)-2-Butene
8.2A The ( E )-( Z ) System for designation alkene diastereomers Br H Cl F (Z)-2-Bromo-1-chloro-1-floroethene H Higher priority igher priority Br H F Cl (E)-2-Bromo-1-chloro-1-floroethene Higher priority H3C H CH3 H (Z)-2-Butene (cis)-2-Butene Higher priority Higher priority H3C H H CH3 (E)-2-Butene (trans)-2-Butene Higher priority CH3 H
Higher priority Cl Cl B (E)-1-Bromo-1s2-dichloroethene (Z)-1-Bromo-1, 2-dichloroethene (cis)-2-Bromo-1, 2-dichloroethene (trans )-2-Bromo-1, 2-dichloroethene (HHH) Higher priority H3C、 CH3 H3C CH2CH3 CH H CH2CH 3 CH3 CH3CH2> CH3 (CHH) E)-3-Methyl-2-pentene (2-3-Methyl-2-pentene (cis)-3-Methyl-2-pentene (trans )-3-Methyl-2-pentene
Cl H Cl Br (E)-1-Bromo-1,2-dichloroethene (cis)-2-Bromo-1,2-dichloroethene Higher priority Cl H Br Cl Cl H Br Cl (Z)-1-Bromo-1,2-dichloroethene (trans)-2-Bromo-1,2-dichloroethene H3C H CH3 CH2CH3 (E)-3-Methyl-2-pentene (cis)-3-Methyl-2-pentene Higher priority H3C H CH2CH3 CH3 CH3 H (HHH) (CHH) (Z)-3-Methyl-2-pentene (trans)-3-Methyl-2-pentene CH3CH2 CH3
8. 3 Nomenclature of alkynes 8.3A IUPAC Nomenclature Unbranched alkynes, for example, are named by replacing the -ane of the name of the corresponding alkane with the ending -yne. The chain is numbered in order to give the carbon atoms of the triple bond the lower possible numbers
8.3 Nomenclature of alkynes 8.3A IUPAC Nomenclature Unbranched alkynes, for example, are named by replacing the –ane of the name of the corresponding alkane with the ending –yne. The chain is numbered in order to give the carbon atoms of the triple bond the lower possible numbers