Systematization number

FIGURE 6.4 Mean concentration of CB153 in pg/g pentane-extractable liquid (PEL) in whole fish from the Dutch Wadden Sea and the cellular fraction of the blood of harbor seals. Numbers of CBs are given in order of elution from the GC column by their systematic numbers according to lUPAC rules as proposed by Ballschmitter and Zell (1980). All concentrations are proportional to the height of the bar. (Reproduced from Boon et al. 1992. With permission.)... 

Asterisk after a compound denotes exception to systematic numbering. 

Halcinonide has also been called Halog and Squibb SQ 18,566. The Chemical Abstracts systematic number is CAS-3093-35-4. 

Figure 5.10. The generalized phase diagram, at atmospheric pressure, for trivalent (not Eu and Yb) intra-lanthanide alloys. The so-called systematization number is shown according to Gschneidner and Calderwood (1986). Notice that, in principle, the same behaviour should be expected for every mixture of any two trivalent lanthanides as long as the same (averaged) systematization number is calculated (see the text).

Table 5.17. Systematization numbers of a few characteristic points in the generalized rare earth phase diagram (according to Gschneidner and Calderwood 1986) (see Fig. 5.10).

This system allows also for the indication of the absolute configuration of inherently chiral fullerenes by introducing the stereodescriptors f C) and f A) ( P = fullerene s = systematic numbering C = clockwise A = anti-clockwise). 

The carbonyl group in an aldehyde is by definition at the terminal position in the carbon chain (R CH2 CH2 CHO). Branching in the carbon chain, or the presence of a functional substituent group, is located by systematic numbering letters of the Greek alphabet may be used to specify in general terms substituents relative to the carbonyl carbon. Illustrative representations are shown below for ... 

Numbers within the Rings Indicate the Systematic Numbering Based on Chemical Abstracts Order of Prefixes Numbers outside the Rings Indicate the Usual Terpene Numbering. These Numberings Are Those in Current Usage and Are Not Necessarily the Recommended Numberings. 

The various numberings proposed for the bicyclics to harmonize their numbering with that of the monocyclics violate, in general, the recognized bicyclo plan. All of these proposals contain limiting phrases such as "in so far as possible" and "with mild concessions to systematic numbering," indicating foreseen discrepancies in over-all applicability. 

Numbers outside Rings in Formulas Indicate the Recommended Numberings for the Norpinane and Pinane Types of Carbon Skeletons Numbers inside Indicate the Systematic Numbering for Bicyclo Names Arrows on Circles Enclosing Numbers Indicate whether Numbering Runs Clockwise or Counterclockwise on die Orientations Shown. The Names Recommended Conform to the Principle of Like Treatment of Like Things (as Interpreted by Chemical Abstracts and the London Chemical Society) and the 1953 Chemical Abstracts Form for Names of Unsaturated Structures. 

There are non-systematic number roots for hydrocarbon derivatives containing acyl groups or derived from acyl groups. These are the ketones, carboxylic acids, esters, nitriles, and amides ... 

Polyspiro compounds are indicated by prefixes dispiro, trispiro, etc. which correspond to the number of spirocenters. The systematic numbering of atoms which are separated by spirocenters starts from the smallest terminal ring and proceeds by the shortest path to the second spirocenter, etc. When the last spirocenter is reached, one counts backward to the starting point. The numbers for the atoms are assigned according to the same principle. For example, the name of compound 2 is pentaspiro[2.0.1.0.2.O.2.0.1. l]tetradecane. 

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