Imines nomenclature

The nomenclature for the N-imines is varied for example, C5H5N+ — N COPh is named variously as pyridine iV-(or l-)benzoylimine, pyridine JV-(or l-)benzoylimide, N-(or l-)benzoyliminopyridinium ylide (or betaine), 1-benzoylaminopyridinium hydroxide, inner salt (Chemical Abstracts), or iV-pyridiniobenzamidate (IUPAC rule). The iV-imine nomenclature will be used in this review. 

Though these alkaloids are not truly composed of two identical monomeric units, they are popularly named dimers or dimeric alkaloids. We prefer to avoid this incorrect nomenclature and would like to encourage the use of the more adequate binary terminology. In another consideration of nomenclature, we describe quaternary salts derived from an imine functionality as imonium salts, in accord with the descriptor for other onium salts (ammonium, oxonium, etc.), rather than by the frequently used iminium terminology. This nomenclature was suggested earlier (/). 

The nomenclature describing the imines discussed in this chapter is presented in Table I. 

Nomenclature Used To Describe the Various Imines Discussed in This Chapter RR C=NR"... 

N,N -Di(2-ethylol)-ethylene diimine Di-nitrate -(EthylenediiminoJ-diethanol Dinitrate (CA nomenclature) or N,N Bis (2-nitroxyethyl)-ethylenedi imine. [called N.N -Bis-(2-nitryloxyathyl)-athylendiamin or Eisalpetersaureester des 1. 2-Bis-(2-hydroxy-athylamino)-athans in Ger],... 

Heterocycle (85) may be systematically described as 3-substituted anhydro-5-hydroxy-1,2,3,4-oxatriazolium hydroxide. However, this nomenclature is somewhat cumbersome and the terminology mesoionic has been used throughout this review. Thus compounds (85)-(87) and (91) are named mesoionic l,2,3,4-oxatriazol-5-ones (85), -5-thiones (86), -5-imines (87) and mesoionic l,2,3,4-thiatriazole-5-alkenes (91), respectively. Using IUPAC Rule. C-87 (85) is named 3-substituted l,2,3,4-oxatriazol-5-ylio oxide or 3-substituted l,2,3,4-oxathiazolylium-5-olate and (87 R = R1 = Ph) is named iV-[3-phenyl-5-(l,2,3,4-oxatriazolio)]anilide. 

No agreement on the nomenclature for these neutral, univalent nitrogen intermediates was achieved for a long time. The names used include imene 14>, imine radical 15 16), azene 17>, azacarbene 18J, imin 19> and nitrene 20>. The nitrene nomenclature, which parallels that for carbenes, is commonly used today and will be employed in this article. In this nomenclature H—N is nitrene, CeHg—N is phenylnitrene, CH3—0—C—N is methoxycarbonylnitrene etc. 

Imines can exist as stereoisomers. The isomers are named by the E, Z system of nomenclature. (The lone pair has the lowest priority.)... 

Osmium, quinuclidinetetraoxime-stereochemistry, 44 Osmium, tetrachloronitrido-tetraphenylarsenate stereochemistry, 44 Osmium, tris( 1,10-phenanthroline) -structure, 64 Osmium(II) complexes polymerization electrochemistry, 488 Osmium(III) complexes magnetic behavior, 273 Osmium(lV) complexes magnetic behavior, 272 Osmium(V) complexes magnetic behavior, 272 Osmium(VI) complexes magnetic behavior, 272 Oxaloacetic acid decarboxylation metal complexes, 427 Oxamidoxime in gravimetry, 533 Oxidation-reduction potentials non-aqueous solvents, 27 Oxidation state nomenclature, 120 Oxidative addition reactions, 282 Oxidative dehydrogenation coordinated imines, 455 Oximes... 

The nomenclature that will be used for the pyridine bis(imine) (FBI) complexes, 4, is related to that used... 

The older chemical nomenclature also calls secondary amines, R—NH—R, imines. In some instances such naming has survived stubbornly. We will avoid it whenever possible and call them secondary amines. ... 

This investigation set out to disentangle a three-way tautomeric process in which only one of its three equilibria is capable of investigation by the basicity method see Section 12.6. As such, it is not only unique as an LSER study but also uniquely important. As any two equilibrium constants can be used to predict the third, this fact provides an internal check on the accuracy of the results not open to any other type of equilibrium. It also provides a challenge to established tautomeric nomenclature while Kj and Kg are commonly used to indicate ketonization and enolization processes, respectively, we require a third and here employ K [17] to denote the switch from imine to enamine that parallels Kg (Figure 11.9). 

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