Held together by 60 hydrogen

A Spherical Molecular Assembly Held Together by 60 Hydrogen Bonds... 

Using information obtained from X-ray crystallography, we have described the structure of a chiral, spherical molecular assembly held together by 60 hydrogen bonds. [10] The host, which conforms to the structure of a snub cube, self-assembles in apolar media and encapsulates guest species within a cavity that possesses an internal volume of approximately 1.4 nm3. 

MacGillivray, L. R., Atwood, J. L., A chiral spherical molecular assembly held together by 60 hydrogen bonds. Nature 1997,389,469-472. 

A Spherical Molecular Container Held Together by 60 Hydrogen Bonds. .. 164 General Principles for the Design of Spherical Containers.165... 

A SPHERICAL MOLECULAR CONTAINER HELD TOGETHER BY 60 HYDROGEN BONDS... 

We have recently demonstrated the ability of six resorcin[4]arenes and eight water molecules to assemble in apolar media to form a spherical molecular assembly which conforms to a snub cube (Fig. 9.3). [10] The shell consists of 24 asymmetric units - each resorcin[4]arene lies on a four-fold rotation axis and each H2O molecule on a three-fold axis - in which the vertices of the square faces of the polyhedron correspond to the corners of the resorcin[4]arenes and the centroids of the eight triangles that adjoin three squares correspond to the water molecules. The assembly, which exhibits an external diameter of 2.4 nm, possesses an internal volume of about 1.4 A3 and is held together by 60 O-H O hydrogen bonds. 

In other cases, such as in [Au(C6F5)(pzCFI2Fc)] [60], different types of van der Waals contacts contribute to the supramolecular three-dimensional structure. In the lattice, the molecules are associated into pairs via an intermolecular Au- Au interaction, and the pairs form chains held together by —H- Au and —H- F hydrogen bonds. The chains are further linked to form a three-dimensional structure through additional H F interactions, as shown in Figure 5.32. 

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