Organic functional groups structure

When the crystallography of compounds related by polymorphism is such that nuclei in the two structures are magnetically nonequivalent, it will follow that the resonances of these nuclei will not be equivalent. Since it is normally not difficult to assign organic functional groups to observed resonances, solid state NMR spectra can be used to deduce the nature of polymorphic variations, especially when the polymorphism is conformational in nature. Such information is extremely valuable at the early states of drug development when solved single crystal structures for each polymorph or solvate species may not yet be available. 

When an examination is restricted to the identification of one or more constituents of a sample, it is known as qualitative analysis, while an examination to determine how much of a particular species is present constitutes a quantitative analysis. Sometimes information concerning the spatial arrangement of atoms in a molecule or crystalline compound is required or confirmation of the presence or position of certain organic functional groups is sought. Such examinations are described as structural analysis and they may be considered as more detailed forms of analysis. Any species that are the subjects of either qualitative or quantitative analysis are known as analytes. 

Introduction to organic chemistry hydrocarbons and functional groups (structure, nomenclature, chemical properties). Physical and chemical properties of simple organic compounds should also be included as exemplary material for the study of other areas such as bonding, equilibria involving weak acids, kinetics, colligative properties, and stoichiometric determinations of empirical and molecular formulas. 

Table 11.3. Some common organic functional groups, showing the family name, the prefix or suffix usedfor naming the group, the drawn structure, and the written formula. 

Introduction to organic chemistry hydrocarbons and functional groups (structure, nomenclature, chemical properties)... 

Organic functional groups definition and structural features... 

The techniques for the determination of the spectroscopic features of organic compounds, and of their relationship to the presence of skeletal and functional group structures are considered in Chapter 3. Chapters 5 and 6 provide spectroscopic summaries of classes of compounds, and more detailed spectroscopic information on specific known compounds as examples in which the interpretation of spectra may be further explored. 

Moreover, very little is known about their structure in terms of the distribution of organic functional groups in the pores, molecular arrangements at the inorganic/organic interface in both the porous products and their surfactant containing precursors. 

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