Compounds that could be Defined as Hybrid Salt-Co-crystals

2 Compounds that could be Defined as Hybrid Salt-Co-crystals 

Compounds that have been classified as abnormal salts could be labelled now as hybrid salt-co-crystals (HSCCs). These compounds have compositions 

In other words, deliquescence means that the system is missing a solvate. 

Although it is difficult to predict the possibility of isolating a HSCC, it is probably more a rule than an exception that these species, which are not obvious candidates and which have exotic stoichiometries with respect to conventional titrations ratios in solution, should be crystallized. One has to keep in mind that the solid state has constraints which do not need to match those prevailing in solution. The existence of these chimeras clearly shows that there are borderline cases which resist any clear cut classification. So far, few researchers have extended their studies sufficiently to be able to put themselves in a situation to detect these HSCCs. 

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