Wheel-and-axle diols

The preferential mechanism of escape of guests from the crystal bulk of inorganic wheel-and-axle diols is studied by using the knowledge base Isostar for intermolec-ular interactions. Two preferential directions of coordination to guest molecules... 

A GEOMETRIC MODEL OF GUEST INCLUSION BY WHEEL-AND-AXLE DIOLS... 

Network Metrics for Inorganic Wheel-and-Axle Diols... 

The wheel-and-axle design as source for host-guest compounds was originally proposed by Toda and Hart in 1981 for hosts containing hydroxyl functions 481 (see Ch. 3, Sect. 2.1 of Vol. 140). The l,l,6,6-tetraphenylhexa-2,4-diyne-l,6-diol (24) provides a representative compound. It forms 1 2 crystalline inclusion complexes with a large number of small guest molecules, including a variety of ketones, amines, amides and a sulfoxide 48). 

Wheel-and-axle organic diols are host systems well known in the solid state. The introduction of a metal into the wheel-and-axle molecular frame opens the way for the design of materials with multiple functions, joining chemical and structural properties of the metal centre with the steric and supramolecular attitudes of the organic matrix. This chapter treats the rationalization of host-guest properties of wheel-and-axle inorganic diols. 

---