
Strong and Weak Molecular InteractionsStrong and Weak Molecular Interactions 141
The coupling of complementary pairs takes place and some radicals
remain free.
This interaction is associated with a computing task.
Figure 7.10 shows another example of binary trees tiling.
Figure 7.10 illustrates another principle of tiling for compounds. It is the
fi rst example of a YY game (Loday 2011). In this graph, we label each edge
either by “0”, “1”, or “2”, so that at each vertex, the three labels appear.
An interesting example of tiling is shown in Fig. 7.11.
Figure 7.11 shows a Cartesian product.
In this case two molecular compounds, one with four radicals, ...