Section Numbers and Descriptions
21 General Organic Chemistry
This section includes general synthetic processes (e.g., hydrogenation, high-pressure synthesis), work-up procedures (preparative-scale chromatography), reactions, nomenclature, and computer applications as these apply to a wide variety of organic compound classes. Reviews, discussions, books, technical reports, and conference proceedings of general interest to organic chemists are included here, as are studies of organic compounds of unknown structure. Physical organic studies of a general nature are placed in Section 22. Industrial manufacturing and processing of compounds normally found in this section are included in Section 45.
22 Physical Organic Chemistry
This section includes studies on the mechanism and kinetics of reactions of aliphatic, cycloaliphatic, aromatic, and heterocyclic compounds, as well as spectral, stereochemical, and thermodynamic studies, correlation analysis, and quantum mechanics where emphasis is on the reaction. Physical organic studies of organometallic compounds and organic natural products are found in Section 26 and 29-34. Where explicit biological significance is stated, the study is included in the appropriate biochemistry section. Fundamental principles of quantum mechanics, thermodynamics, and spectra with no explicit reference to organic structures or reactions are included in Sections 65, 69, and 73, respectively.
23 Aliphatic Compounds
This section includes the synthesis, purification, stabilization, reactions, and determination of molecular structure of acyclic carbon compounds. Physical organic studies are included in Section 22. Cyclic derivatives of aliphatic acids, such as lactams and lactones, are included in Section 27 or 28. The manufacture, processing, and properties of common monomers are included in Sections 35, 36, 37, and 39. The manufacture of aliphatic compounds specifically for use as fuels or in fuel products is included in Section 51. Industrial manufacturing and processing of compounds normally found in this section are included in Section 45.
24 Alicyclic Compounds
This section includes the synthesis, purification, stabilization, reactions, and determination of molecular structure of alicyclic carbon compounds, including fully hydrogenated derivatives of polynuclear condensed benzene compounds and such aromatic compounds as azulenes, fulvenes, and tropones. Physical organic studies are included in Section 22. Cyclic derivatives of alicyclic acids, such as lactams and lactones, are included in Section 27 or 28. Prostaglandins and other alicyclic natural products or their synthetic analogs are included in Section 26. Industrial manufacturing and processing of compounds normally found in this section are included in Section 45.
25 Benzene, Its Derivatives, and Condensed Benzenoid Compounds
This section includes the synthesis, purification, stabilization, and reactions of benzene and its derivatives, and of condensed carbocyclic compounds containing at least one fused benzene ring. Physical organic studies are included in Section 22. Cyclic derivatives of acids, such as anhydrides and lactones, are included in Section 27 or 28. The manufacture of benzene and its derivatives specifically for use as or in fuel products is included in Section 51. The manufacture, processing, and properties of common monomers are included in Sections 35, 36, 37, and 39. Industrial manufacturing and processing of compounds normally found in this section are included in Section 45.
26 Biomolecules and Their Synthetic Analogs
This section includes synthesis, reactions, physical organic studies, and determination of molecular structures of naturally occurring &bgr;-lactams and other antibiotics, prostaglandins, flavonoids, porphyrins, pheromones, and vitamins, including analogs and intermediates in their synthesis, but excludes natural products placed in more specific sections. Simple biomolecules, when used for other than biological purposes, e.g., nonbiological uses of ethanol, citric acid, coumarin, and furfural, are included in the appropriate biochemical, organic chemistry, or other section. Isolation studies and studies in which both isolation and characterization or structure elucidation are reported are included in Section 11 or other biochemistry sections. Chemical syntheses in which a fermentative step is the point of the study are included in Section 16.
27 Heterocyclic Compounds (One Hetero Atom)
This section includes the synthesis, purification, stabilization, reactions, and determination of molecular structure of cyclic compounds that contain two or more carbon atoms in a single ring and no more than one hetero atom (nitrogen, oxygen, sulfur, and the halogens), as well as spiro compounds with one hetero atom in each ring. Physical organic studies are included in Section 22. Studies on the preparation, processing, and properties of caprolactam, ethylene oxide, propylene oxide, and similar common monomers, unless a nonpolymer application is explicitly stated, are included in Section 35 or 36. Industrial manufacturing and processing of compounds normally found in this section are included in Section 45.
28 Heterocyclic Compounds (More Than One Hetero Atom)
This section includes the synthesis, purification, stabilization, reactions, and determination of molecular structure of cyclic compounds that contain one or more carbon atoms in a single ring and a total of two or more hetero atoms (nitrogen, oxygen, sulfur, and the halogens). Physical organic studies are included in Section 22. Cephalosporins, penicillins, their analogs, and intermediates in their preparation are included in Section 26. Nucleosides and nucleotides are included in Section 33. Industrial manufacturing and processing of compounds normally found in this section are included in Section 45.
29 Organometallic and Organometalloidal Compounds
This section includes the synthesis, stabilization, purification, physical organic studies, reactions, and determination of molecular structure of compounds that contain one or more carbon-metal or carbon-metalloid covalent (sigma and pi) bonds. Metal heterocyclics containing no carbon-metal bond in the ring, e.g., borazine, phosphazene, and cyclotrisiloxane, or homocycles, e.g., cyclopentagermane, are also included here. Simple metal carbonyls, cyanides, carbides, and cyanates are included in Sections 49 or 78.
30 Terpenes and Terpenoids
This section includes the synthesis, reactions, physical organic studies, characterization, and structure studies of terpenes and terpenoids, compounds possessing carbon skeletons that for the most part can be regarded as built by fusion of two or more isoprene units. Steroidal terpenoids as well as rosins, tall oil, resin acids, and turpentine, if specific terpenoid components are emphasized or characterized, are included here. Terpenoid alkaloids are included in Section 31. Isolation studies and studies in which both isolation and characterization or structure elucidation are reported are included in Section 11 or other biochemistry section.
31 Alkaloids
This section includes the synthesis, reactions, physical organic studies, characterization, and structure studies of alkaloids (nitrogenous bases of plant, animal, or microbial origin, with typically characteristic physiological activity), including their analogs and intermediates in their synthesis. Terpenoid and peptide alkaloids are included here. Steroidal alkaloids are included in Section 32. Isolation studies and studies in which both isolation and characterization or structure elucidation are reported are included in Section 11 or other biochemistry section. Biological amines (such as phenethylamine and tyramine) and purine derivatives (such as caffeine, theobromine, and theophylline) are included in Section 26.
32 Steroids
This section includes the synthesis, characterization, physical organic studies, and structure studies of steroids, substances containing the cyclopenta(a)phenanthrene structure, which may be of plant, animal, or microbial origin, and closely related compounds. Steroidal alkaloids are included here. Terpenoid steroids are included in Section 30 and steroidal saponins in Section 33. Isolation studies and studies in which both isolation and characterization or structure elucidation are reported are included in Section 11 or other biochemistry section. Chemical syntheses in which a fermentative step is the point of the study are included in Section 16.
33 Carbohydrates
This section includes the nonindustrial synthesis, reactions, physical organic studies, and structure studies of three-membered and higher carbohydrates and their derivatives and polymers. Nucleosides, nucleotides, steroidal saponins, and the chemical synthesis and semisynthesis of nucleic acids are also included here. Isolation studies and studies in which both isolation and characterization or structure elucidation are reported are included in Section 11 or other biochemistry section. Chemical syntheses in which a fermentative step is the point of the study, are included in Section 16. Glycopeptides and glycoproteins are included in Section 34 or a biochemistry section. Carbohydrates of commercial and industrial significance, such as cane and beet sugars, molasses, starches, gums, mucilages, and pectins, are included in Section 44 or a biochemistry section.
34 Amino Acids, Peptides, and Proteins
This section includes the synthesis, reactions, characterization, physical organic studies, and structure studies of amino acids and peptides of plants, animal, or microbial origin and their derivatives, including poly(amino acids) and sequential polypeptides derived from naturally occurring amino acids. Glycopeptides and chemical synthesis and semisynthesis of proteins and glycoproteins are included here. Other studies of proteins and glycoproteins including amino acid composition and sequence as well as functional groups and cross-links are included in Section 6. Synthesis and properties of poly(amino acids) or their derivatives which are primarily of use or potential use as plastics or fibers or which are prepared and studied for their macromolecular properties are included in Section 35, 36, or 40.