Maltose monohydrate, structure

Figure 3. Schematic diagram of the hydrogen-bond structure of p-maltose monohydrate (MALTOS11). The anrows indicate infinite chains. Distances and angles are from the neutron diffraction analysis.

Fig. 2.6 a, b. Hydrogen-bond connectivity diagram for maltose monohydrate, a Projection of a section of the crystal structure b schematic connectivity diagram... 

The cooperative, infinite chains and cycles formed by O-H 0 hydrogen bonds in the a-cyclodextrin hydrates are a characteristic structural motif [109]. As with the simpler carbohydrate crystal structures described in Part II, Chapter 13, the hydrogen bonds can be traced from donor to acceptor in the cyclodextrin hydrate crystal structures. Networks of O-H 0-H 0-H interactions are observed in which the distribution of hydrogen bonds follows patterns with two characteristic motifs. One are the "infinite chains which run through the whole crystal lattice, and the others are the loops or cyclically closed patterns (a special case of the "infinite chains). As in the small molecule hydrates, such as a-maltose monohydrate, the chains and cycles are interconnected at the water molecules to form the complex three-dimensional networks illustrated schematically in Fig. 18.5, with some sections shown in more detail in Fig. 18.7 a, b, c. 

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