quaternary carbon atom

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• quaternary carbon atom — ketvirtinis anglies atomas statusas T sritis chemija apibrėžtis Su keturiais C atomais susijungęs anglies atomas. atitikmenys: angl. quaternary carbon atom rus. четвертичный атом углерода …   Chemijos terminų aiškinamasis žodynas

• Carbon–carbon bond — A carbon–carbon bond is a covalent bond between two carbon atoms.[1] The most common form is the single bond: a bond composed of two electrons, one from each of the two atoms. The carbon–carbon single bond is a sigma bond and is said to be formed …   Wikipedia

• Carbon-carbon bond — A carbon carbon bond is a covalent bond between two carbon atoms [JerryMarch] . The most common form is the single bond – a bond composed of two electrons, one from each of the two atoms. The carbon carbon single bond is a sigma bond and is said… …   Wikipedia

• Quaternary ammonium muscle relaxants — are quaternary ammonium salts used as drugs for muscle relaxation, most commonly in anasthesia. It is necessary to prevent spontaneous movement of muscle during surgical operations. Muscle relaxants inhibit neuron transmission to muscle by… …   Wikipedia

• Quaternary (disambiguation) — Quaternary (from Latin quaternarius ) is an adjective meaning consisting of or containing four each , but sometimes (as in geology) taken to mean fourth or fourth hand , where it is used in place of quartary to continue the sequence Primary,… …   Wikipedia

• quaternary — [kwät′ər ner΄ē, kwə tʉr′nə rē] adj. [L quaternarius < quaterni, four together, four each < quater, four times < base of quattuor,FOUR] 1. consisting of four; in sets of four 2. [usually Q ] designating or of the second and current… …   English World dictionary

• Carbon-13 NMR — (13C NMR or sometimes simply referred to as carbon NMR) is the application of nuclear magnetic resonance (NMR) spectroscopy to carbon. It is analogous to proton NMR (1 H NMR) and allows the identification of carbon atoms in an organic molecule… …   Wikipedia

• Atom — The smallest part of any material that cannot be broken up by chemical means. Each atom has a center (the nucleus) which contains protons and neutrons. Electrons orbit around the nucleus. The atom is primarily empty space. If the nucleus of an… …   Medical dictionary

• quaternary ammonium compound — n any of numerous strong bases and their salts derived from ammonium by replacement of the hydrogen atoms with organic radicals and important esp. as surface active agents, disinfectants, and drugs called also quat, quaternary * * * an organic… …   Medical dictionary

• Quaternary chemistry — A Quaternary centre in chemistry is an atom which is attached to 4 other atoms , usually carbon, and discounting hydrogen atoms. For example, in the following reaction, the nitrogen atom is said to be quaternized as it has gone from 3 to 4… …   Wikipedia

• Fenestrane — A fenestrane in organic chemistry is a type of chemical compound with a central quaternary carbon atom which serves as a common vertex for four fused carbocycles [ Fenestranes and the flattening of tetrahedral carbon Bhaskar Rao Venepalli and… …   Wikipedia