2 Structural Isomers Pentane and 2-methylbutane are both C5H12. 1-butene 2-methylpropenecyclobutanemethylcyclopropaneC4H10 has 2 isomers (2-methylpropane, butane). C4H8 has more isomers because the position of the double affects the name and because ring structures can be drawn.
3 Geometric Isomers cis = same side, trans = opposite sides 1,2-dichloroethene requires cis or trans.1,2-dichloroethane does not require cis or trans because they would both represent the same molecule (to move chlorine from the same side to opposite sides only requires that the C – C single bond be rotated).cis-1,2-dimethylcyclopentanetrans-1,2-dimethylcyclopentane
4 1,1-dimethylcyclopentane A molecule is relatively inflexible when a multiple (double or triple) bond is present or if a ring structure (including benzene) exists.a) not isomers (they don’t have the same chemical formula: C5H12 vs. C5H10)b) structural isomers (same as question #1)c) geometric isomersd) not isomers (both diagrams represent the exact same molecule)
5 PolymersMonomer: the smallest repeating unit of a polymer (propene in polypropylene).Polymer: a long chain molecule made up of many small identical units (monomers).Addition polymerization: a reaction in which unsaturated monomers combine with each other to form a polymer.Teflon, polypropylene, polyester, polyethylene (pop bottles, grocery bags), polystyrene (packing material), Plexiglas, polyvinyl chloride (vinyl), natural rubber, etc.