making aromatic chair conformation

For 4th - There are 6 pi electrons in the resonance contributor making it aromatic.. No idea..has to do with chair conformation perhaps??

... are two criteria that a cyclic molecule must meet in order to be aromatic. as a hexagon, but whose most stable arrangement is actually the chair conformation.

Lectures 2 and 3: Structure and Conformation

anti-aromatic: A highly unstable planar ring system. Typically, the most stable cyclohexane conformation. Looks like a chair.
Many others, though, are non-aromatic, and it is these cyclic structures that. As a general rule, the most stable chair conformation of a six-membered ring will be that.
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Lectures 2 and 3: Structure and Conformation. Principal topics. Non-aromatic discussed here: Heteroaromatic (see Dr Hart's. twist (V&S misleadingly call the latter "half-chair").
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make an aromatic ring more susceptible to electrophilic substitution make an. transition-state conformation of cyclohexane. less stable than chair conformation because.

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Conformation Search - Richards Center at Yale University Promiscuity in ligand-binding: The three-dimensional structure of. Promiscuity in ligand-binding: The three-dimensional structure of. Media Portfolio CHE321 Exam 1 9/26/2006 Cyclo­hexa­none 2-nitro­phenyl­hydrazone .