Question

For each of the species below, identify any cyclic conjugated system, then: A. Determine the number of electrons in a system of cyclic conjugation (zero if no cyclic conjugation) B. Specify whether the species is "a"-aromatic, "aa"-anti-aromatic, or "na"-non-aromatic (neither aromatic nor anti-aromatic). (Presume rings to be planar unless structure obviously prevents planarity. If there is more than one conjugated ring, count electrons in the largest.) 1. A.Electrons in a cyclic conjugated system B.The compound is (a, aa, or na) A.Electrons in a cyclic conjugated system. B.The compound is (a, aa, or na)

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Answer 1

1. [6]. Annulene Total number of electrons in cyclic conjugated systen 216, it is anti aromatic since it is a tn systems. sotal number of conjugating eletrons 74. this is an anti aromatic 4n hence system NH2 Methylbenzene COCH3 4-Amino acetophenone {-oh Benzene Carboxylic acid OCH3 OH A hydrosy -3-methoxybenzaldehyle.

hone numbering should be noted, os most prefenced group is formal CHCo) put a for that and then clockwise and name accoroliy to alphabetic order-