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Unformatted text preview: 28+x kJ/mol 3.8+3.8+3.8+(3.8+y)= 15.2+y kJ/mol 28 16 28+z kJ/mol 28+z kJ/mol 28+x kJ/mol 15.2+y kJ/mol 15.2+2y kJ/mol Energy kJ/mol x = Eclipsed interaction between H <-> Et y = Gauche interaction between CH 3 <-> Et z = Eclipsed interaction between Et <-> Me 3. Name the following compounds using IUPAC rules. 5-ethyl-2,2-dimethylheptane 5-cyclobutyl-1-cyclopropyl-3-ethyl-2-methylcyclohexane 8-sec-butyl-9-tert-butyl-7-isopentyl-6-isopropyl-12-neopentyloctadecane 3-ethyl-2,2,4,5,5-pentamethylhexane 1-sec-butyl-4-(2-methylbutyl)cycloheptane Note: You dont need to memorize octadecane...
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