Coordination-type nomenclature

Fig. 2. Classification/nomenclature of host—guest type inclusion compounds, definitions and relations (/) coordinative interaction, (2) lattice barrier interaction, (J) monomolecular shielding interaction (I) coordination-type inclusion compound (inclusion complex), (II) lattice-type inclusion compound (multimolecular/extramolecular inclusion compound, clathrate), (III) cavitate-type inclusion compound (monomolecular/intramolecular inclusion...

VI (d2), and the examples in Table 1 illustrate the kinds of complexes formed and their stereochemistries. Several of these oxidation states are not well characterized the — I and V states are rare, while I is not common. The most frequently encountered oxidation states in complexes of a conventional coordination type (particularly in aqueous media) are II (ds) and III (ds) the ferrous and ferric states respectively. The preferred nomenclature, and that used here, indicates these oxidation states as iron(II) and iron(III). 

The compound commonly named diphosphoric acid, H4P2O7 = [(H0)2P(0)0P(0)(0H)2], is named according to the coordination-type additive nomenclature as ... 

Substantial attention and progress has been made in the development of procedures to effect conversion between chemical substance representations. Zamora and Davis [26] describe an algorithm to convert a coordinate representation of a chemical substance (derived from input by a chemical typewriter) to a connection table. An approach for interactive input of a structure diagram and conversion of this representation to a connection table suitable for substructure searching is discussed by Feldmann [27]. The conversion of systematic nomenclature to connection tables offers a powerful editing tool as well as a potential mechanism for conversion of name files to connection tables this type of conversion is described by Vander Stouw [28]. 

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