The geometrical categorization of intermolecular bonding

Correlation studies on intramolecular bonding parameters were a great success in structural chemistry [6]. In a natural extension, statistical studies of the geometrical parameters of intermolecular bonding began to appear in an attempt to rationalize the complex phenomena of molecular recognition and condensation. Not unexpectedly, success in this latter task was much less immediate. 

The above ideas have spurred a eontinuing flow of statistieal studies on all kinds of intermolecular contacts, with a vast literature [13]. The quest for statistieal eorrelations between stmctural and energetie properties of moleeules and their crystals has been 

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