Supramolecular Chemistry

Which of the following molecules is will form inclusion complexes with beta-cyclodextrins?

(1) ferrocene; (2) carborane; (3) (Z)-azobenzene

• (1) only

• All of the above

• (2) and (3) only

• (1) and (2) only

A host molecule for cyclic urea X below has the following general structure: Which of the following possibilities for the heterocycle R is likely to give the strongest host-guest binding in chloroform?

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Which of the following guest molecules will be expected to bind most strongly with receptor M below?

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In designing a molecular receptor for the nucleobase, guanine, to function in polar aprotic solvents, which of the following molecular design features would likely be the most important for engineering selectivity?

• An electron-rich aromatic ring, e.g. naphthalene

• A hydrogen bonding array on the receptor with donor-acceptor-acceptor (DAA) arrangement

• A moiety capable of forming inclusion complexes (e.g. cyclodextrins)

A receptor for a monosaccharide has the following general structure: Which of the following monosaccharides is likely to be the most strongly bound to this receptor in water?

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What is the primary force involved in the formation of micelles?

• Hydrogen bonding

• Van der Waals forces

• Hydrophobic effect

• Electrostatic interactions

Which of the following host molecules is likely to bind Cs⁺ most strongly in acetonitrile?

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The following receptor was designed to bind and sense cations by fluorescence spectroscopy. Which of the following cations is the receptor likely to be selective for?

• Rb+

• Mg2+

• Lu3+

• Hg2+