MANCUDE ring system

Ending resulting from the change of the ine ending in names of cyclic mancude ring systems to ino to form prefixes in fusion nomenclature. (See Section P-25.3 of the Blue Bookb.)... 

A cyclophane is a compound that has a MANCUDE ring system, that is to say, a MAximium number of NonCUmulative DoublE bonds, or assemblies of MANCUDE ring systems. 

For comparison, only a few dozen alkanes are designated as parent hydrides. Over 73 000 rings and ring systems are mancudes and about 10 000 are carbocycles. 

The extended Hantzsch-Widman system is used to name monocycles of saturated and mancude rings with between three and ten members, inclusive. The names are composed of two parts non-detachable prefix(es), indicating the heteroatom and a stem indicating the size of the ring. Names of prefixes (called a prefixes) are listed in Table 4.8 and names of stems in Table 4.9. 

Fused polycyclic systems are very numerous and diverse. They are named using the structures and names of their smaller components and the concept of ortho-fusion, which is purely a formal operation encountered in nomenclature. This concept is essential to the naming of larger systems, and is the formation of one bond by the condensation of two bonds belonging to two different cyclic systems, one of them being a mancude ring. 

The International Union of Pure and Applied Chemistry (IUPAC) produced a set of rules for the definition of highly complex ring systems. Under these guidelines a cyclophane (i) has a mancude ... 

Although the majority of the ring systems considered in this section are fully saturated, a number conform to the mancude (maximum noncumulated double bond) structure, and some of these possess full cyclic conjugation and so merit consideration for the description aromatic. The... 

Heterocyclic compounds with up to ten ring members are generally named by the extended HW System. In order to do this, a hetero symbol (or several of these symbols) from the table of V terms (Table 4) is combined (eliding the final V ) with a stem term of the following Table 5 that indicates both ring size and degree of saturation. (Unsaturation here means maximum number of non-cumulative double bonds - mancude.)... 

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