Problems of Structural Chemistry Presented in This Book

Looking at a list of smaller twin numbers, we noticed that prime number 5 appears to be the only prime number that appears in two twin prime pairs (3,5) and (5,7). Is this the only prime number that is a member of two twin groups or, in other words, is the triplet (3, 5, 7) the only twin prime number triplet  

The question is whether there are some molecular fragments or sets of atoms and atomic groups, at least in the case of some physical properties of ensembles of molecules, which are critical structural factors for the considered molecular property and which could define such fragments as physicophore.  

Explore if the complexity algorithm mentioned above holds, that is, gives plausible results, for selected classes of molecules, such as (i) acyclic alkane graphs, (ii) cata-condensed benzenoid graphs, (iii) smaller polycylic graphs. 

Under what conditions will a pair of isospectral graphs g, h upon enlargement produce isospectral pairs G and H7 

Is there isospectral folding That is, are there two different protein foldings that will produce the same eigenvalues of the binary folding matrix  

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Appendix 18 List of Problems of Structural Chemistry Presented in This Book... 

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