Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Organic chemistry general characteristics

Nitration is important for two reasons firstly, because it is the most general process for the preparation of aromatic nitro compounds secondly, because of the part which it has played in the development of theoretical organic chemistry. It is of interest because of its own characteristics as an electrophilic substitution. [Pg.1]

The photochemical reactions of organic compounds attracted great interest in the 1960s. As a result, many useful and fascinating reactions were uncovered, and photochemistry is now an important synthetic tool in organic chemistry. A firm basis for mechanistic description of many photochemical reactions has been developed. Some of the more general types of photochemical reactions will be discussed in this chapter. In Section 13.2, the relationship of photochemical reactions to the principles of orbital symmetry will be considered. In later sections, characteristic photochemical reactions of alkenes, dienes, carbonyl compounds, and aromatic rings will be introduced. [Pg.743]

The concept of a group is especially important in organic chemistry. A functional group represents a set of atoms that is closely linked with chemical reactivity and defined classes of substances. For instance, the functional group hydroxyl, -OH, is characteristic of the classes alcohol, phenol and enol. Alcohols are often represented by the general formula R-OH, in which R- represents a hydrocarbon group typical of aliphatic and alicyclic substances. [Pg.15]

The general characteristics of the hydrogenation of compounds possessing C=N bonds were already described in the 1940s and the reaction has been applied in preparative organic chemistry. The results were summarized in monographs315,441 446. In recent years mainly the asymmetric hydrogenation of the C=N bond has been studied. [Pg.890]

A second feature, also noted earlier, is the interest of many living chemists in the history of their science, often manifested in some autobiographical form. A third characteristic of many of the works cited below, also of general occurrence, is the strong emphasis on obviously useful organic chemistry. There is, therefore, much activity in the history of medical chemistry (Chapter 8) and also in the studies of natural products and of synthesis that must precede any usefulness. Polymers come well to the fore. [Pg.57]

Poisons usually enter a body through the mouth or nose, but some substances may be absorbed through the skin. Susceptibility to poisons depends on an organism s individual characteristics, such as age, mass, past history, general health, and body chemistry. Some toxins, such as lead, mercury, and arsenic, can accumulate in the body and may cause problems over a long period of time. [Pg.52]

A present-day definition of organic chemistry would be one that includes the study of carbon compounds, and in particular those compounds that possess covalent carbon/carbon and carbon/hydrogen bonds. This definition is very general, and as such there are many exceptions to it. For example, carbonates and carbides are normally considered under the chemistry of the cation with which they are associated. This is because, even though they contain covalent bonds, they are often ionic solids with high melting points, and these are characteristic properties of inorganic compounds. [Pg.13]


See other pages where Organic chemistry general characteristics is mentioned: [Pg.1]    [Pg.158]    [Pg.136]    [Pg.219]    [Pg.471]    [Pg.27]    [Pg.51]    [Pg.64]    [Pg.96]    [Pg.220]    [Pg.246]    [Pg.99]    [Pg.335]    [Pg.136]    [Pg.355]    [Pg.15]    [Pg.171]    [Pg.235]    [Pg.11]    [Pg.514]    [Pg.91]    [Pg.54]    [Pg.402]    [Pg.105]    [Pg.565]    [Pg.257]    [Pg.291]    [Pg.339]    [Pg.282]    [Pg.219]    [Pg.340]    [Pg.7]    [Pg.92]    [Pg.108]    [Pg.156]    [Pg.656]    [Pg.1019]    [Pg.371]    [Pg.689]    [Pg.100]    [Pg.320]    [Pg.355]   


SEARCH



General characteristics

General chemistry

General organization

© 2024 chempedia.info