As someone in the teaching profession, my experience is that most instructors are happy when a student understands the content at a level high enough to catch mistakes. It could be an honest mistake in the wording of the question. It would be worth contacting your instructor and asking for clarification, noting that these are not examples of any kind of stereoisomerism. Electron donating groups are generally ortho/para directors for electrophilic aromatic substitutions, while electron withdrawing groups are generally meta directors with the exception of the halogens which are also ortho / para directors as they have lone pairs of electrons that are shared with the aromatic ring. The two main types of stereoisomerism are enatiomerism and diastereomerism. ortho-diphenols, flavonoids, tannins, and antioxidant properties. Constitutional isomerism is not a type of stereoisomerism. Characterization of the Biofilms Formed by Histamine-Producing. So, what then are the relationships between these three compounds? Let's look at a decision flowchart for relationship between structures: The positions of substituents are indicated by numbers except that o- (ortho), m- (meta), and p- (para) may be used in place of 1,2-, 1,3-, and 1,4. All isomers require bond-breaking to interconvert. Not that the qualifying text about having to break bonds to interconvert is unhelpful and irrelevant. The (1,2), (1,3), and (1,4) in the names of these compounds indicate that this is not the case. Stereoisomers have the same connectivity of atoms (constitution) with different arrangement in space. These compounds do not have a stereochemical relationship.
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