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- 1. Determine which of the following compounds show cis-trans isomerism.2. Draw and name the cis and trans (or Z and E) isomers of those that do.(a) hex-3-ene (b) buta-1,3-diene (c) hexa-2,4-diene11.28 Write the IUPAC names for these alkanes and cycloalkanes. (a) CH;CHCH,CH,CH3 CH3 (b) CH;CHCH,CH,CHCH, CH3 CH3 (c) CH;(CH,),CHCH,CH, CH,CH3 (d) (e) (f)A.) On any clean sheet of paper, draw both the condensed and line-bond structure of the following compounds: 7) 4-ethylcycloheptene 8) 4,4-dimethylpent-2-ene 9) 3-chloro-2,7-dimethylnon-4-yne (Cl- Chloro branch) 10) 1-cyclohexylbut-2-yne
- Draw the structure of (Z) 2,4-dimethyl-3-octeneWhen two six-membered rings share a C—C bond, this bicyclic system is called a decalin. There are two possible arrangements: trans-decalin having two hydrogen atoms at the ring fusion on opposite sides of the rings, and cis-decalin having the two hydrogens at the ring fusion on the same side. a.) Draw trans- and cis-decalin using the chair form for the cyclohexane rings.b.) The trans isomer is more stable. Explain why.2. a) Draw the structures of Perylene dianhydride, Naphthalene and Salicylic acid b) Arrange the compounds in order of increasing polarity considering the structures and Rf values
- 12a. On the small chair draw the most stable skeletal conformation of rans-1-ethyl-3-isopropylcyclohe. ane, make sure to draw the Hydrogens directly connected to the ring. ( 12b. On the big chair only draw the alkyl groups skeletal and omit the Hydrogens connected to the ring. ( 12a. 12b. draw the correct skeletal structure here draw the cor.ect skeletal structure here5.) cyclopentane Why slightly soluble in water? Why insoluble in HCl? Why completely soluble in NaOH? Why insoluble in NaHCO?) Draw the six stereoisomers of octa-2,4,6-triene. Explain why there are only six stereoisomers, rather than the eight we might expect for a compound with three stereogenic doublebonds.
- 1. Draw structures for a) (2E,4Z) - hepta-2,4-diene b) (S) - 2-bromobutaneFor each alkene, indicate the direction of the dipole moment. For each pair, determine which compound has the largerdipole moment.(a) cis-1,2-difluoroethene or trans-1,2-difluoroethene(b) cis-1,2-dibromoethene or trans-2,3-dibromobut-2-eneWhat is a molecule that fits these three criteria: It should have a molar mass between 180 and 280 g/mol, contain a substituted cyclohexane like e. g. 5,6-dihydroxy-bicyclo[2.2.2]octane-2-carboxylic acid methyl ester, and be optically active.