PROBLEM 4 What is wrong with these structures? Suggest better ways to represent these molecules 1 11 H-C-C-NH OH H - - H2C-N-CH, HC CH -NH2 PROBLEM 5 Draw structures for the compounds named systematically here. In each case suggest alternative names that might convey the structure more clearly if you were speaking to someone rather than writing. (a) 1,4-di-(1,1-dimethylethyl)benzene (b) 1-(prop-2-enyloxy)prop-2-ene (c) cyclohexa-1,3,5-triene PROBLEM 6 Translate these very poor structural descriptions into something more realistic. Try to get the angles about right and, whatever you do, don't include any square planar carbon atoms or any other bond angles of 90. (a) C.H,CH(OH)(CH2).COC,H, (b) O(CH2CH2), (c) (CH,O),CH=CHCH(OCH). PROBLEM 7 Identify the oxidation level of all the carbon atoms of the compounds in problem 6