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What Are Websites That Rely on User Participation and User-Contributed

question 266

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What are websites that rely on user participation and user-contributed content, such as Facebook, LinkedIn, and YouTube?


Definitions:

Pyrene

A polycyclic aromatic hydrocarbon (PAH) consisting of four fused benzene rings, resulting in a flat aromatic system.

Huckel Rule

A rule that helps predict the aromaticity of planar rings based on the count of pi electrons, stating that aromatic compounds must have 4n+2 pi electrons.

Aromatic

Refers to molecules that contain one or more planar rings of atoms with delocalized pi electron systems, typically associated with increased stability.

Antiaromatic

Compounds that have a cyclic, planar arrangement of atoms with 4n electrons that destabilize the molecule.

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