7. Consider the C=O stretching data for the following cyclic ketones: cyclopropane 1813 cm¹; cyclobutanone 1791 cm³¹; cyclopentanone 1740 cm³¹. (a) which ketone has the strongest bond? (b) where in the trend would you expect the C-O stretch of cyclopropenone? (Use the hybridization information in the same way we used hybridization for C-H stretching.)

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Write the systematic name of each organic molecule: (10 HO—C—CH–CH2–CH–CH2–CH2−C CH3 I CH3 structure || HO—C—CH—CH,—OH CH3 CH3 CI-CH₂-CH-CH₂-C-OH name 0

1) Consider the following 5 compounds: NH2 H3C- NHh = white Cos H=red NH2 NH2 NH2 COOH H- -COOH COOH H3C čOOH NH2 čOOH H3C H- -NH2 ČOOH II II H3C H NH2 COOH H, COOH H3C. COOH NH2 NH2 COOH NH2 IV Indicate which of the following TWO structures are described by the following (use all ten a. possible combinations, +&4, I & II, &-V, 1& V, I & I,tt&V, H&V, II & IV, II & V, V-& Identical:+V, Enantiomers: | V,1-11 Diastereomers: lIV IV, N V b. Indicate which of the above compounds WILL rotate plane polarized light when dissolved in solution by writing their Roman numeral(s) here.