#organic chemistry

• Abientin / Abietic compound — A technical specialty term designating an organic compound, an acid derivative, or a resinous substance extracted or isolated from the cellular structures of conifers, specifically from the genus Abies (fir). In pharmaceutical chemistry and pharmacognosy, abientin properties are analyzed due to their antiseptic, anti-inflammatory, and expectorant potential, with acids of this class serving as precursors in synthesizing dermatological ointments and pulmonary inhalation products.
• Actinium — A radioactive, silvery-white metallic chemical element with atomic number 89 and symbol Ac, which initiates the actinide series in the periodic table. Discovered in 1899 by André-Louis Debierne, actinium is extremely rare in the Earth's crust, occurring in trace amounts within uranium ores. Structurally, it crystallizes in a face-centered cubic system, is highly reactive, and emits an intense bluish glow in the dark due to the ionization of the surrounding air.
• Addition — The act of adding and its result; a fundamental chemical process through which two or more molecules combine to form a single, more complex product without the elimination of by-products; broadly, it represents the operation of addition, a supplementary element brought to an assembly, or the phenomenon of inserting a segment into a pre-existing structure to modify or improve its properties.
• Addition — The act of additioning and its result; a fundamental chemical process in which two or more molecules combine to form a single main product without the elimination of by-products, characteristic of unsaturated compounds. In a broad sense, it represents the operation of adding, supplementing, or structurally attaching new elements to a pre-existing assembly to modify or improve its properties.
• Adurol — A commercial and technical name assigned to a halogenated derivative of hydroquinone (such as monochlorohydroquinone or monobromohydroquinone), historically used in analog photography as a rapid, high-contrast developing agent. In modern industrial chemistry, the compound serves as an intermediate in the organic synthesis of specialized polymers, stabilizers, or antioxidants, valued for its potent reducing properties.
• Albuminous — Containing albumin, of the nature of albumin, or rich in soluble proteins; pertaining to tissues, biological fluids, or seeds of higher plants that incorporate a significant amount of nourishing protein endosperm.
• Albumose — A term utilized in older biochemical nomenclature to designate proteoses, a group of soluble macromolecular products resulting from the partial hydrolysis or enzymatic digestion of albumins, which do not coagulate with heat and precipitate under the action of ammonium sulfate.
• Alkane — A generic name given to saturated acyclic hydrocarbons with linear or branched chains, containing exclusively single sigma bonds between carbon atoms and having the general molecular formula CnH2n+2. Alkanes (historically termed paraffins) exhibit relatively low chemical reactivity at room temperature and constitute the primary component of natural gas and petroleum (e.g., methane, ethane, propane, butane).
• Alkene — A generic name given to unsaturated acyclic hydrocarbons with linear or branched chains, containing a single covalent carbon-carbon double bond (C=C) and having the general molecular formula CnH2n. Alkenes (historically termed olefins) exhibit a much higher chemical reactivity than alkanes, being capable of participating in addition, polymerization, and oxidation reactions (e.g., ethene, propene, alkene isomers).
• Alkyl — A generic name given to monovalent, saturated, acyclic hydrocarbon radicals, theoretically obtained by removing a hydrogen atom from an alkane. They possess the general molecular formula CnH2n+1 and are structurally named by replacing the suffix '-ane' of the corresponding alkane with the suffix '-yl' (e.g., methyl, ethyl, propyl, butyl), serving as fundamental components in organic compound synthesis.
• Alkylation — The act of alkylating and its result; a laboratory or industrial chemical process through which an alkyl radical is introduced into an organic molecule by replacing a hydrogen atom or another functional group. Alkylation is a fundamental reaction widely utilized in petroleum refining to obtain high-octane gasolines, as well as in drug and detergent synthesis.
• Alkylate — The liquid reaction product obtained in the petroleum refining industry through the alkylation process of isobutane with light alkenes (propene, butene); a mixture of branched saturated hydrocarbons with a high octane rating, utilized as a premium component for eco-friendly aviation and automotive gasolines due to its lack of aromatics or sulfur. As an adjective/participle, it describes an organic molecule into which an alkyl radical has been structurally introduced.
• Alkyne — A generic name given to unsaturated acyclic hydrocarbons with linear or branched chains, containing a single covalent carbon-carbon triple bond (-C≡C-) and having the general molecular formula CnH2n-2. Alkynes (historically termed acetylenes) are compounds with very high chemical reactivity, easily participating in addition and polymerization reactions, with major industrial applications as raw materials in organic synthesis.
• Alcohol — An organic compound containing one or more hydroxyl (-OH) functional groups bound to a saturated carbon atom. In common parlance, the term refers to ethanol or ethyl alcohol, a volatile, flammable liquid obtained through the fermentation of sugars or chemical synthesis, acting as the active ingredient in intoxicating beverages and an essential solvent in industry and pharmacy.
• Alcohol — The standard and widely adapted Romanian spelling for alcohol. An organic compound characterized by the presence of one or more hydroxyl groups attached to a saturated alkyl radical. It represents the structural baseline of ethanol used as an antiseptic, general industrial solvent, or as the major psychoactive ingredient in a wide range of fermented or distilled beverages.
• Alcoholate — In chemistry, an organic compound obtained by replacing the hydrogen atom in the hydroxyl group of an alcohol with a metal atom (alkoxide). In pharmacy, the term designates a medicinal liquid preparation obtained by distilling alcohol over aromatic plant substances, used as an antiseptic or flavoring remedy.
• Alcohols — An extensive class of organic compounds containing one or more hydroxyl (-OH) functional groups bound directly to sp3 hybridized carbon atoms. This category includes a broad range of substances with diverse properties, from simple volatile molecules like methanol and ethanol to complex polyhydroxyl structures, heavily utilized in chemical synthesis, pharmacy, and industry.
• Alcoholizable — Capable of being alcoholized; a substance, organic compound, or liquid mixture that has the structural property to receive alcohol into its composition or to chemically react with ethanol. In biology, it describes a tissue or organic sample capable of being stably impregnated with alcohol for cellular fixation or preservation.
• Alkoxide — An organic ionic compound formed by replacing the hydrogen atom in the hydroxyl group (-OH) of an alcohol with a metallic cation (typically sodium, potassium, or another alkali metal). Alkoxides are extremely strong bases and excellent nucleophiles, heavily used in organic synthesis as reagents or catalysts in substitution, elimination, or condensation reactions.
• Aldehyde — An organic compound containing a carbonyl functional group bonded to a hydrogen atom (the formyl group, -CHO), necessarily located at the end of a carbon chain. Aldehydes are obtained industrially or in the laboratory through the dehydrogenation or controlled oxidation of primary alcohols and are widely used in chemical synthesis, the perfume industry, and disinfectant production.