Hybrid salt co-crystals

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... 

Co-crystals are nothing other than intermediate compounds. Thus, the term might only be justified by the nature of the bonds connecting the partners that constitute the crystal. Nevertheless, the concept suffers from intrinsic uncertainties due to the numerous, difficult to categorize, situations in which they can occur, such as the continuum between solvate and co-crystals, hybrid salt-cocrystals, multi-epitaxy and so on. It is even possible to find the same partners with simultaneously salt-like and co-crystal-like relationships in a given crystal structure. ... 

Crystal structures of [Pt(terpy)(SCH2CH20H)][N03] (264) and its intercalates with deoxymethoxy-pTpA and deoxy-CpG (463,464) have been described. The parent compound shows two types of stacking interactions in the solid, with the planes separated by 3.4 A (264). The intercalate with deoxymethoxy-pTpA contains the novel trinuclear cation [Pt(H2NCH2CH2SPt(terpy))2], which has been prepared independently by Lippard and co-workers (167). A structural investigation of the tetra-fluoroborate salt (Fig. 20) revealed the two Pt(terpy) units to be parallel and stacked. Since the sulfur atoms are sp hybridized, the molecules are chiral. 

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