In section C, the definitions of groups of chemical elements are as follows:
Alkali metals: Li, Na, K, Rb, Cs, Fr
Alkaline earth metals: Ca, Sr, Ba, Ra
Lanthanides: elements with atomic numbers 57 to 71 inclusive
Rare earths: Sc, Y, Lanthanides
Actinides: elements with atomic numbers 89 to 103 inclusive
Refractory metals: Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, W
Halogens: F, Cl, Br, I, At
Noble gases: He, Ne, Ar, Kr, Xe, Rn
Platinum group: Os, Ir, Pt, Ru, Rh, Pd
Noble metals: Ag, Au, Platinum group
Light metals: alkali metals, alkaline earth metals, Be, Al, Mg
Heavy metals: metals other than light metals
Iron group: Fe, Co, Ni
Non-metals: H, B, C, Si, N, P, O, S, Se, Te, noble gases, halogens
Metals: elements other than non-metals
Transition elements: elements with atomic numbers 21 to 30 inclusive, 39 to 48 inclusive, 57 to 80 inclusive, 89 upwards
The following notes are meant to assist in the use of this part of the classification scheme. They must not be read as modifying in any way the elaborations.
Section C covers:
pure chemistry, which covers inorganic compounds, organic compounds, macromolecular compounds, and their methods of preparation;
applied chemistry, which covers compositions containing the above compounds, such as: glass, ceramics, fertilisers, plastics compositions, paints, products of the petroleum industry. It also covers certain compositions on account of their having particular properties rendering them suitable for certain purposes, as in the case of explosives, dyestuffs, adhesives, lubricants, and detergents;
certain marginal industries, such as the manufacture of coke and of solid or gaseous fuels, the production and refining of oils, fats and waxes, the fermentation industry (e.g., brewing and wine-making), the sugar industry;
certain operations or treatments, which are either purely mechanical, e.g., the mechanical treatment of leather and skins, or partly mechanical, e.g., the treatment of water or the prevention of corrosion in general;
metallurgy, ferrous or non-ferrous alloys.
-
In the case of operations, treatments, products or articles having both a chemical and a non-chemical part or aspect, the general rule is that the chemical part or aspect is covered by section C.
In some of these cases, the chemical part or aspect brings with it a non-chemical one, even though purely mechanical, because this latter aspect either is essential to the operation or treatment or constitutes an important element thereof. It has seemed, in fact, more logical not to dissociate the different parts or aspects of a coherent whole. This is the case for applied chemistry and for the industries, operations and treatments mentioned in Notes (1)(c), (d) and (e). For example, furnaces peculiar to the manufacture of glass are covered by class Fulltext... Hierarchy... Expanded...C03 and not by class Fulltext... Hierarchy... Expanded...F27.
There are, however, some exceptions in which the mechanical (or non-chemical) aspect carries with it the chemical aspect, for example:
Photographic materials and processes, in class Fulltext... Hierarchy... Expanded...G03, and, generally, the chemical treatment of textiles and the production of cellulose or paper, in section D.
In still other cases, the pure chemical aspect is covered by section C and the applied chemical aspect by another section, such as A, B or F, e.g., the use of a substance or composition for:
When the chemical and mechanical aspects are so closely interlocked that a neat and simple division is not possible, or when certain mechanical processes follow as a natural or logical continuation of a chemical treatment, section C may cover, in addition to the chemical aspect, a part only of the mechanical aspect, e.g., after-treatment of artificial stone, covered by class Fulltext... Hierarchy... Expanded...C04. In this latter case, a note or a reference is usually given to make the position clear, even if sometimes the division is rather arbitrary.
In this class, the following term is used with the meaning indicated:
"preparation" covers purification, separation, stabilisation or use of additives, unless a separate place is provided therefor. [4]
In this class, in the absence of an indication to the contrary, and with the exception referred to below, a compound is classified in the last appropriate place, e.g. a compound containing an acyclic chain and a heterocyclic ring is classified only as a heterocyclic compound, and a steroid is classified only as a cyclopentanophenanthrene compound. In general, and in the absence of an indication to the contrary (such as groups Fulltext... Hierarchy... Expanded...C07C 59/58, Fulltext... Hierarchy... Expanded...C07C 59/70), the terms "acyclic" and "aliphatic" are used to describe compounds in which there is no ring; and, if a ring were present, the compound would be taken by the "last place" rule to a later group for cycloaliphatic or aromatic compounds, if such a group exists. Where a compound or an entire group of compounds exists in tautomeric forms, it is classified as though existing in the form which is classified last in the system, unless the other form is specifically mentioned earlier in the system.
Chemical compounds and their preparation are classified in the groups for the type of compound prepared. The processes of preparation are also classified in the groups for the types of reaction employed, if of interest. General processes for the preparation of a class of compounds falling into more than one main group are classified in the groups for the processes employed, when such groups exist. The compounds prepared are also classified in the groups for the types of compound prepared, if of interest.
In this class, in the absence of an indication to the contrary, the compounds containing carboxyl or thiocarboxyl groups are classified as the relevant carboxylic or thiocarboxylic acids, unless the "last place rule" (see Note (2), above) dictates otherwise; a carboxyl group being a carbon atom having three bonds, and no more than three, to hetero atoms, other than nitrogen atoms of nitro or nitroso groups, with at least one multiple bond to the same hetero atom and a thiocarboxyl group being a carboxyl group having at least one bond to a sulfur atom, e.g. amides or nitriles of carboxylic acids, are classified with the corresponding acids. [5]
ACYCLIC, CARBOCYCLIC, OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM, OR TELLURIUM (metal-containing porphyrins Fulltext... Hierarchy... Expanded...C07D 487/22)
In this subclass, organic acid salts, alcoholates, phenates, chelates or mercaptides are classified as the parent compounds. [2]
In this subclass, it is desirable to add the indexing codes of subclass Fulltext... Hierarchy... Expanded...C07M. The indexing codes should be unlinked. [6]
C07F 1/00
Compounds containing elements of the 1st Group of the Periodic System
C07F 1/02
·
Lithium compounds
C07F 1/04
·
Sodium compounds
C07F 1/06
·
Potassium compounds
C07F 1/08
·
Copper compounds
C07F 1/10
·
Silver compounds
C07F 1/12
·
Gold compounds
C07F 3/00
Compounds containing elements of the 2nd Group of the Periodic System
C07F 3/02
·
Magnesium compounds
C07F 3/04
·
Calcium compounds
C07F 3/06
·
Zinc compounds
C07F 3/08
·
Cadmium compounds
C07F 3/10
·
Mercury compounds
C07F 3/12
· ·
Aromatic substances containing mercury
C07F 3/14
· ·
Heterocyclic substances containing mercury
C07F 5/00
Compounds containing elements of the 3rd Group of the Periodic System
C07F 5/02
·
Boron compounds
C07F 5/04
· ·
Esters of boric acids
C07F 5/05
· ·
Cyclic compounds having at least one ring containing boron but no carbon in the ring [2]
C07F 5/06
·
Aluminium compounds
C07F 7/00
Compounds containing elements of the 4th Group of the Periodic System
C07F 7/02
·
Silicon compounds
C07F 7/04
· ·
Esters of silicic acids
C07F 7/06
· · ·
with hydroxyaryl compounds
C07F 7/07
· · ·
Cyclic esters [2]
C07F 7/08
· ·
Compounds having one or more C—Si linkages
C07F 7/10
· · ·
containing nitrogen
C07F 7/12
· · ·
Organo silicon halides
C07F 7/14
· · · ·
Preparation thereof from halogenated silanes and hydrocarbons
C07F 7/16
· · · ·
Preparation thereof from silicon and halogenated hydrocarbons
C07F 7/18
· · ·
Compounds having one or more C—Si linkages as well as one or more C—O—Si linkages
C07F 7/20
· · ·
Purification; Separation
C07F 7/21
· ·
Cyclic compounds having at least one ring containing silicon but no carbon in the ring [2]
C07F 7/22
·
Tin compounds
C07F 7/24
·
Lead compounds
C07F 7/26
· ·
Tetra-alkyl lead compounds
C07F 7/28
·
Titanium compounds
C07F 7/30
·
Germanium compounds [2]
C07F 9/00
Compounds containing elements of the 5th Group of the Periodic System
Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom [5]
C07F 9/553
· · ·
having one nitrogen atom as the only ring hetero atom [5]
C07F 9/564
· · · ·
Three-membered rings [5]
C07F 9/568
· · · ·
Four-membered rings [5]
C07F 9/572
· · · ·
Five-membered rings [5]
C07F 9/576
· · · ·
Six-membered rings [5]
C07F 9/58
· · · · ·
Pyridine rings [5]
C07F 9/59
· · · · ·
Hydrogenated pyridine rings [5]
C07F 9/60
· · · · ·
Quinoline or hydrogenated quinoline ring systems [5]
C07F 9/62
· · · · ·
Isoquinoline or hydrogenated isoquinoline ring systems [5]
C07F 9/64
· · · · ·
Acridine or hydrogenated acridine ring systems [5]
C07F 9/645
· · ·
having two nitrogen atoms as the only ring hetero atoms [5]
C07F 9/6503
· · · ·
Five-membered rings [5]
C07F 9/6506
· · · · ·
having the nitrogen atoms in positions 1 and 3 [5]
C07F 9/6509
· · · ·
Six-membered rings [5]
C07F 9/6512
· · · · ·
having the nitrogen atoms in positions 1 and 3 [5]
C07F 9/6515
· · ·
having three nitrogen atoms as the only ring hetero atoms [5]
C07F 9/6518
· · · ·
Five-membered rings [5]
C07F 9/6521
· · · ·
Six-membered rings [5]
C07F 9/6524
· · ·
having four or more nitrogen atoms as the only ring hetero atoms [5]
C07F 9/6527
· · ·
having nitrogen and oxygen atoms as the only ring hetero atoms [5]
C07F 9/653
· · · ·
Five-membered rings [5]
C07F 9/6533
· · · ·
Six-membered rings [5]
C07F 9/6536
· · ·
having nitrogen and sulfur atoms with or without oxygen atoms, as the only ring hetero atoms [5]
C07F 9/6539
· · · ·
Five-membered rings [5]
C07F 9/6541
· · · · ·
condensed with carbocyclic rings or ring systems [5]
C07F 9/6544
· · · ·
Six-membered rings [5]
C07F 9/6547
· · · · ·
condensed with carbocyclic rings or ring systems [5]
C07F 9/655
· · ·
having oxygen atoms, with or without sulfur, selenium, or tellurium atoms, as the only ring hetero atoms [5]
C07F 9/6553
· · ·
having sulfur atoms, with or without selenium or tellurium atoms, as the only ring hetero atoms [5]
C07F 9/6558
· · ·
containing at least two different or differently substituted hetero rings neither condensed among themselves nor condensed with a common carbocyclic ring or ring system [5]
C07F 9/6561
· · ·
containing systems of two or more relevant hetero rings condensed among themselves or condensed with a common carbocyclic ring or ring system, with or without other non-condensed hetero rings [5]
C07F 9/6564
· · ·
having phosphorus atoms, with or without nitrogen, oxygen, sulfur, selenium or tellurium atoms, as ring hetero atoms [5]
C07F 9/6568
· · · ·
having phosphorus atoms as the only ring hetero atoms [5]
C07F 9/6571
· · · ·
having phosphorus and oxygen atoms as the only ring hetero atoms [5]
C07F 9/6574
· · · · ·
Esters of oxyacids of phosphorus [5]
C07F 9/6578
· · · ·
having phosphorus and sulfur atoms with or without oxygen atoms, as ring hetero atoms [5]
C07F 9/6581
· · · ·
having phosphorus and nitrogen atoms with or without oxygen or sulfur atoms, as ring hetero atoms [5]
C07F 9/6584
· · · · ·
having one phosphorus atom as ring hetero atom [5]
C07F 9/6587
· · · · ·
having two phosphorus atoms as ring hetero atoms [5]
C07F 9/659
· · · · ·
having three phosphorus atoms as ring hetero atoms [5]
C07F 9/6593
· · · · · ·
1,3,5-Triaza-2,4,6-triphosphorines [5]
C07F 9/6596
· · ·
having atoms other than oxygen, sulfur, selenium, tellurium, nitrogen or phosphorus as ring hetero atoms [5]
C07F 9/66
·
Arsenic compounds
C07F 9/68
· ·
without As—C bonds
C07F 9/70
· ·
Organo-arsenic compounds
C07F 9/72
· · ·
Aliphatic compounds
C07F 9/74
· · ·
Aromatic compounds
C07F 9/76
· · · ·
containing hydroxyl groups
C07F 9/78
· · · ·
containing amino groups
C07F 9/80
· · ·
Heterocyclic compounds
C07F 9/82
· · · ·
Arsenic compounds containing one or more pyridine rings
C07F 9/84
· · · ·
Arsenic compounds containing one or more quinoline ring systems
C07F 9/86
· · · ·
Arsenic compounds containing one or more isoquinoline ring systems
C07F 9/88
· · · ·
Arsenic compounds containing one or more acridine ring systems
C07F 9/90
·
Antimony compounds
C07F 9/92
· ·
Aromatic compounds
C07F 9/94
·
Bismuth compounds
C07F 11/00
Compounds containing elements of the 6th Group of the Periodic System
C07F 13/00
Compounds containing elements of the 7th Group of the Periodic System
C07F 15/00
Compounds containing elements of the 8th Group of the Periodic System
C07F 15/02
·
Iron compounds
C07F 15/03
· ·
Sideramines; The corresponding desferri compounds
C07F 15/04
·
Nickel compounds
C07F 15/06
·
Cobalt compounds
C07F 17/00
Metallocenes [2]
C07F 17/02
·
of metals of the iron group or the platinum group [2]
C07F 19/00
Metal compounds according to more than one of the preceding main groups [5]