Cryptate nomenclature

Cryptands, 42 122-124, 46 175 nomenclature, 27 2-3 topological requirements, 27 3-4 Cryptate, see also Macrobicyclic cryptate 12.2.2], 27 7-10 applications of, 27 19-22 cylindrical dinuclear, 27 18-19 kinetics of formation in water, 27 14, 15 nomenclature, 27 2-3 spherical, 27 18 stability constants, 27 16, 17 Crystal faces, effect, ionic crystals, in water, 39 416... 

An additional nuance in the nomenclature of these compounds concerns their complexes. The open-chained compounds are often referred to as podands and their complexes as podates. The cyclic ethers may also be called coronands and their complexes are therefore coronates. Complexed cryptands are cryptates. The even more complicated structures known as spherands, cavitands, or carcerands are called spherates, cavitates, or carcerates, respectively, when complexed. The combination of a macrocycle (crown ether or coro-nand) and a sidechain (podand) is typically called a lariat ether. 

Cation complexes of cryptands were called cryptates and those of spherands, spherates. The name coronand was suggested for crown ethers and their complexes would therefore be coronates <1980ICAL45>. The latter nomenclature has proved to be acceptable to the community but it has not been universally adopted. A reasonable and systematic approach, based on principles of polymer nomenclature, has appeared but has not found wide acceptance <1984JCI266>. 

These macroblcycllc ligands (I) discovered by Lehn (13) form extremely stable cation Inclusion complexes, called cryptates. In the nomenclature system used herein. Structure I would be designated [211] when m 2 and n°=p=l. 

Extensive studies on metal (Ni or Fe) promoted oxidative dehydrogenations of this and related systems have been reported, the latter paper containing a note on the nomenclature of these complexes which appears to have become rather confused. Related complexes,a new synthesis of cyclam as its Ni complex, and an investigation of Li salt complexes of cyclam by i.r. measurements have also been reported. Mononuclear cryptates, with a wide variety of metal iodides and chlorides, and dinuclear cryptates, with AgN03 and HCOgTl, involvingthe macrotricyclic ligand (500) are discussed. 8i... 

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