What is the order of reactivity of the following substituted benzenes toward nitration? Mad CH3 prise O₂N Strong Sea Mod activ LOCH3 Strong deact CBг3 II CF3 Strong III deact (A) I>II > III (B) II > I > III (C) III > II > I (D) III > I > II

2. Compound A, C;H100 , is one of the basic building blocks of nature. All steroids and many other naturally occuring compounds are built from compound A. Spectroscopic analysis of A yields the following information: IR: 3400 cm-'; 1640 cım- IH NMR: 1.63 & (3 H, singlet); 1.70 ô (3 H, singlet); 3.83 6 (1 H, broad singlet); 4.15 8 (2 H, doublet, j = 7 Hz); 5.70 ô (1 H, triplet, ) = 7 Hz) (a) How many double bonds and/or rings does A have? (b) From the IR spectrum, what is the identity of the oxygen-containing functional group? (c) What kinds of protons are responsible for the NMR absorptions listed ? (d) Propose a structure for A.

In the presence of hydrogen peroxide forms the highly toxic Water; Superoxide dismutase Hydroxide; Amyloid plaques Ferrous iron; hydroxyl radical Superoxide dismzutase; superoxide radical

4G 4G ill iill 1:54 PM 43 ... H2NCH;CH,CHNH2 CH3 3. Draw structures corresponding to the following IUPAC names: (a) Triethylamine (b) N-Methylaniline (c) Tetraethylammonium bromide (e) N-Ethyl-N-methylcyclopentylamin (d) p-Bromoaniline