CH3-
molecular formula mo*lec"u*lar form"u*la, n. (Chem.) An expression representing the composition of elements in a chemical substance, commonly consisting of a series of letters and numbers comprising the atomic symbols of each element present in a compound followed by the number of atoms of that element present in one molecule of the substance. Thus the molecular formula for common alcohol (ethyl alcohol) is {C2H6O}, meaning that each molecule contains two carbon atoms, six hydrogen atoms, and one oxygen atom. The molecular formula may be written to provide some indication of the actual structure of the molecule, in which case structural units may be written separately. Thus, ethyl alcohol can also be written as {CH3.CH2.OH} or {CH3-CH2-OH}, in which the period or dash between functional groups indicates a single bond between the principle atoms of each group. This formula shows that in ethyl alcohol, the carbon of a methyl group ({CH3-}) is attached to the carbon of a methylene group ({-CH2-}), which is attached to the oxygen of a hydroxyl group ({-OH}). A {structural formula} is a graphical depiction of the relative positions of atoms in a molecule, and may be very complicated. [PJC]

The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • CH3- — Methyl Meth yl, n. [See {Methylene}.] (Chem.) A univalent hydrocarbon radical, {CH3 }, not existing alone but regarded as an essential residue of methane, and appearing as a component part of many derivatives; as, methyl alcohol, methyl ether,… …   The Collaborative International Dictionary of English

  • CH3+ — Méthylium (cation) Trois orbitales sp2. Le cation méthylium est le composé chimique de formule CH3+. C est un carbocation de type carbénium, avec un atome de carbone en configuration plane tétragonale due à une hybridation sp …   Wikipédia en Français

  • CH3 — Formyl For myl, n. [Formic + yl.] (Chem.) (a) A univalent radical, {H.C:O}, regarded as the essential residue of formic acid and aldehyde. (b) Formerly, the radical methyl, {CH3}. [1913 Webster] …   The Collaborative International Dictionary of English

  • CH3 — Méthyle Méthyle En chimie, un groupe méthyle (souvent abrégé Me) est un radical alkyle hydrophobe dérivé du méthane (CH4). Sa formule est CH3 Selon la nomenclature internationale de l IUPAC, pour nommer les radicaux organiques …   Wikipédia en Français

  • CH3 — Harvard Graphics 3.0 Chart (Computing » File Extensions) …   Abbreviations dictionary

  • CH3-CO — Radical monovalente asociado con los derivados del ácido acético; se indica a veces por el símbolo Ac. Diccionario Mosby Medicina, Enfermería y Ciencias de la Salud, Ediciones Hancourt, S.A. 1999 …   Diccionario médico

  • (CH3)2NH — Amina secundaria que se encuentra en el guano y en el pescado en descomposición. Diccionario Mosby Medicina, Enfermería y Ciencias de la Salud, Ediciones Hancourt, S.A. 1999 …   Diccionario médico

  • CH3-CH2-OH — molecular formula mo*lec u*lar form u*la, n. (Chem.) An expression representing the composition of elements in a chemical substance, commonly consisting of a series of letters and numbers comprising the atomic symbols of each element present in a …   The Collaborative International Dictionary of English

  • CH3(CH2)10COOH — Acide dodécanoïque Acide Laurique Général Nom IUPAC Acide dodécanoïque No CAS …   Wikipédia en Français

  • CH3(CH2)14COOH — Acide palmitique Acide palmitique Général Nom IUPAC acide hexadécanoïque No CA …   Wikipédia en Français

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