Inorganic compounds formula index

This review is intended to cover most of the aspects of NMR in phosphorus chemistry, especially stressing those aspects directly related to electronic and structural factors. Some subjects will only be briefly reviewed, e.g. resonances in solid compounds, in metal complexes [this subject has been treated in a previous article in this seriesa969,1)] and biological applications. All the compounds reviewed are tabulated in either Formula Index I (inorganics) or Formula Index II (organics), the whole comprising of more than four thousand five hundred entries. These indicesf list all available chemical shifts for phosphorus and fluorine those for other nuclei (except protons) are reported in the text of this review. 

In empirical formulas of inorganic compounds, electropositive elements are listed first [3]. The stoichiometry of the element symbols is indicated at the lower right-hand side by index numbers. If necessary, the charges of ions are placed at the top right-hand side next to the element symbol (e.g., S "). In ions of complexes, the central atom is specified before the ligands are listed in alphabetical order, the complex ion is set in square brackets (e.g., Na2[Sn(OH)+]). 

This index lists all compounds appearing in the azeotropic tables. Included are formula, name, standard boiling point, and numbers of the systems in which the compound appears as a component. The inorganic substances are indexed first. 

The Hill system is used in modified form today by Chemical Abstracts and Referativny Zhurnal, Khimiya (17) and indexes both inorganic and organic compounds. Beilsteins Handbuch (2) formula index to the second supplement uses the Hill system. This index covers the original work and two supplements. 

Compounds are not always formula-indexed under their own formulas. This is a departure from the ideal, but is reasonable. The interest in a salt of a complex organic acid is likely to be mainly in the acid.. It is more valuable to have the record of the salt under the formula of the acid for the use of searchers looking up the acid. In Chemical Abstracts entries under their own formulas are made for all strictly inorganic and strictly organic compounds, both addition compounds and true reaction derivatives (esters, acetals, hydrazones, oximes, picrates, semi-carbazones, etc.) the diethyl ester of malonic acid is found under C7H]204. 

From the dawn of organic chemistry as such to the present time there exists a continuous record in fonnula index form (Table II) of the compounds of this large branch of chemistry. Inorganic chemistry is not so fortunate. [Hoffman (12) indexed organic compounds by formula to 1909.] From this date to 1920, when Chemical Abstracts began indexing by formula, there is no compilation of inorganic compounds by formula. 

The most important consideration in this connection is the fact that while Chemical Abstracts does not make its Formula Index the exclusive index of organic compounds or even the primary index of compounds, it does enter all compounds by formulas and thus gives the inorganic chemist the same consideration as that given the organic chemist without any neglect either of the organic chemist or of the chemist who is not prepared readily to calculate empirical formulas for complex yet familiarly named compounds. 

Compounds are listed by molecular formula following the Hill convention. Substances not containing carbon are listed first, followed by those that contain carbon. To locate an organic compound by name or CAS Registry Number when the molecular formula is not known, use the table Physical Constants of Organic Compounds in Section 3 and its indexes to determine the molecular formula. The indexes to Physical Constants of Inorganic Compounds in Section 4 can be used in a similar way. 

The present volume of Inorganic Syntheses contains sixty-five contributions covering a wide range of compounds and emanating from a large number of laboratories both in this country and abroad. As in previous volumes of this series, each synthesis has been carefully checked in a laboratory other than that from which it was submitted. Also in accordance with established practice, the syntheses in Volume VII are arranged on the basis of the Mendeleev periodic classification, with subdivision into A and B groups. The author, subject, and formula indexes in this volume are cumulative for all seven volumes. 

The formula index (Fig. 4) is now issued semi-annually and includes both organic and inorganic substances. By means of it, it is possible to find information about compounds which may have... 

Structure of all elements and compounds of known structure. Volumes 1-3 deal with the elements and inorganic compounds up to the silicates, vol. 4 with aliphatic compounds, and vol. 5 with aromatic and other cyclic compounds. Each chapter is divided into four sections—text, tables, illustrations, and ample bibliography. There is a formula index and name index of organic compounds. 

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