| 41. | CitB oxidizes the C-atom of a methyl group bound to the aromatic ring and produces an alcohol.
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| 42. | The aromatic ring of the bisphenol can be substituted with an allylic group for improved toughness of the material.
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| 43. | The naphthalene analogs allow for further numeric substitutions, including eight position " differing aromatic rings are possible.
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| 44. | Saturated cyclic compounds contain single bonds only, whereas aromatic rings have an alternating ( or conjugated ) double bond.
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| 45. | Phenols can have two or more hydroxy groups bonded to the aromatic ring ( s ) in the same molecule.
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| 46. | Both molecular weight and aromatic rings add to polymers'thermal stability, increasing the creep resistance of a polymer.
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| 47. | Typical pharmacophore features include hydrophobic centroids, aromatic rings, hydrogen bond acceptors or donors, cations, and anions.
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| 48. | They have two aromatic rings separated by 1-3 atoms ( often a stilbene-type of arrangement ).
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| 49. | This forms a bicyclic intermediate which normally then extrudes a molecule of nitrogen gas to form an aromatic ring again.
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| 50. | The negative charge is delocalised into the aromatic ring, making it far more nucleophilic and increases its ortho selectivity.
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