Weak hydrogen bonds in crystal engineering
Weak hydrogen bonds in crystal engineering
Weak hydrogen bonds in crystal engineering
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The problem<br />
• Intermolecular <strong>in</strong>teractions <strong>in</strong> organic molecular solids are weak<br />
• A functional group forms <strong>in</strong>teractions with other groups but its<br />
exact behaviour dur<strong>in</strong>g <strong>crystal</strong>lisation depends on the nature<br />
and position<strong>in</strong>g of all the other functional groups <strong>in</strong> the molecule<br />
– In supramolecular chemistry, hydrocarbon residues also<br />
count as functional groups.<br />
• Therefore <strong>crystal</strong> structures are not related to molecular<br />
structures <strong>in</strong> simple ways<br />
• The goal is to f<strong>in</strong>d families of <strong>crystal</strong> structures that are related<br />
to the molecular structures <strong>in</strong> simple, easily understandable<br />
ways, based on well known chemical pr<strong>in</strong>ciples
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