Question

Model 3: Representations of methylcyclobutane H Skeletal Ball-and-stick Wedee and Wedge and dash Perspective ("stick") Cash with explicit hydrogens Model 4: 1.2-dimethylcyclobutane, shown with ring carbons numbered 1-4 (b) LACH 2CH SCH Name (9) Are the molecules in boxes (a) and (b) of Model 4 constitutional womers of each other? Explain 10. Pher than bonds to cartons within the ring, what we aroups are bonded to the following carbons? a. carbon 1 in box (a)? b. carbon 1 in box (b)? C. carbon 2 in box (a)? carbon 2 in box (b)? 11. you have access to a muus IL LOREHE VIURE U LURES PUU - black; H = white; use the short bonds for single bonds). Is it possible to rotate single bonds in the models such that the molecule in box (a) is the same as the one bax (b)? Information: Since each carben in the molecule in box (a) in Model 4 is bonded to the same four groups as the corresponding carbon in the molecule in box (b), the molecules are said to have the same connectivity You confirmed in CTQ 11 that the two structures of 1,2-dimethylcyclobutane shown above are not simply conformers of each other. Imagine that the four carbons of the cyclobutane ring define a plane. In one structure, the two methyl groups are on the same side of this plane, and in the other they are on Opposite sides of the plane. The single bonds in the ring cannot rotate without breaking the ring. TWO groups on the same side of the plane are considered to be cls to one another. Groups on opposite sides are called trans. Geometric isomers (cis-trans isomers) are molecules that have the same connectivity and differ only in the geometric arrangement of groups. CA30 -122

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Answer 1

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