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The numbers 200-900 would be confused easily with 22 to 29 if they were used in chemistry. khīlioi = 1000, diskhīlioi = 2000, triskhīlioi = 3000, etc. 13 to 19 are formed by starting with the Greek word for the number of ones, followed by και (the Greek word for 'and'), followed by δέκα (the Greek word for 'ten').
The suffixes -diol, -triol, -tetrol, etc., are used for multiple −OH groups: Ethylene glycol CH 2 OHCH 2 OH is ethane-1,2-diol. If higher precedence functional groups are present (see order of precedence, below), the prefix "hydroxy" is used with the bonding position: CH 3 CHOHCOOH is 2-hydroxypropanoic acid.
Conversions between units in the metric system are defined by their prefixes (for example, 1 kilogram = 1000 grams, 1 milligram = 0.001 grams) and are thus not listed in this article. Exceptions are made if the unit is commonly known by another name (for example, 1 micron = 10 −6 metre).
Nomenclature of inorganic and organic chemistry; Standardization of atomic weights; Standardization of physical constants; Editing tables of properties of matter; Establishing a commission for the review of work; Standardization of the formats of publications; Measures required to prevent repetition of the same papers.
In chemistry, meta is a prefix, used for systematic names in IUPAC nomenclature. It has several meanings. [1] In organic chemistry, meta indicates the positions of substituents in aromatic cyclic compounds. The substituents have the 1,3-positions, for example in resorcinol.
Non-numerical prefixes are italicized and uncapitalized in titles (tert-Butyl alcohol, for example). Both numerical and non-numerical prefixes are followed by a hyphen. The template {{DISPLAYTITLE}} is used to display titles which start with lowercase letters or include italics.
Pages in category "Chemistry prefixes" The following 14 pages are in this category, out of 14 total. This list may not reflect recent changes. A. Alk-Aza-B. But-D.
The α-carbon is important for enol- and enolate-based carbonyl chemistry as well. Chemical transformations affected by the conversion to either an enolate or an enol, in general, lead to the α-carbon acting as a nucleophile , becoming, for example, alkylated in the presence of primary haloalkane .