Formula index table

The pyrrolopyridines contain one nitrogen heteroatom in the five-membered pyrrole ring and one nitrogen atom in the six-membered pyridine ring. A more common name is azaindoles, with 7-azaindole (l//-pyrrolo[2,3-6]pyridine (1)) being the most widely studied isomer of the series. Twelve isomers of pyrrolopyridines are listed in the Chemical Abstracts Ring Formula Index. Table 1 lists the pyrrolopyridines with their Chemical Abstracts Registry Numbers. The 1//-pyrrolopyridines (l)-(6) are the most frequently prepared, but some work has also been carried out on the isomers (7), (8), and (10). Isomers (8), (9), (11), and (12) are tautomeric structures which are considered later (see Section 7.06.4.4). 

C6H4-) and is plaeed in eategory 4 (carbon atoms not otherwise eounted) as 6 earbon atoms and in category 5 (protons) as 3 protons. In the last example, there are five methylene groups, one carbonyl, no other carbons, one proton (from -NH-), no uncounted oxygens, and one nitrogen. The approximately 2700 entries in the Formula Index Table were generated in a similar fashion. 

The Chemical Abstracts System (CAS) produces a set of various databases ranging from bibliographic to chemical structure and reaction databases. All the databases originate from the printed media of Chemical Abstracts, which was first published in 1907 and is divided into different topics. Author index, general index, chemical structure index, formula index, and index guide arc entries to the corresponding database (Table 5-3). 

Table 1.14 Empirical Formula Index of Organic Compounds 1.58...

This Formula Index consists of over 28 000 compounds that occur in the 6562 text pages of Volumes 1-6. Indexed compounds may appear in the text, equations, Schemes, Figures or Tables. Only specific compounds and not general classes of compound have been indexed the counter ion has been excluded. Limitations of space do not permit every coordination compound to be indexed each time it is mentioned, therefore compounds are only indexed when considered to be important in the context of the topic under discussion. 

The chief aim of this Formula Index, like that of other formula indexes, is to help in locating specific compounds, or even groups of compounds, that might not be easily found in the Subject Index, or in the case of compounds in tables or of many complex coordination compounds, not to be found at all in the Subject Index. All specific compounds, or in some cases ions, with definite formulas (or even a few less definite) are entered in this index, whether entered specifically in the Subject Index or not. As in the latter index, boldface type is used for formulas of compounds or ions whose preparations are described in detail, in at least one of the references cited. 

The entries in Tables XIV-XXII have been arranged in order of formula, first the carbonyl compound then the olefin, as they would be found in Chemical Abstracts Formula Index. 

To convert dhk values to the dimensions of the two-dimensional unit cell by a formula from Table 9.5, the spots in the LEED pattern must be indexed. 

Table 3 Empirical Formula Index and Cone Angles of Phosphorus Compounds...

Tables of azeotropes and nonazeotropes compiled by L. H. Horsley and coworkers at the Dow Chemical Co. Included are a formula index, a bibliography, and three articles, "Vapor-Liquid Equilibrium Diagrams of Alcohol-Ketone Azeotropes as a Function of Pressure, ...

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