| 释义 |
picoline
pic·o·line P0289100 (pĭk′ə-lēn′, pī′kə-)n. Any of three isomeric liquids, C6H7N, related to pyridine and derived from coal tar, horse urine, and rendered bones, that are variously used as industrial solvents, waterproofing agents, intermediates in dyes and resins, and in the synthesis of picolinic acid and niacin.
[Latin pix, pic-, pitch + -ol + -ine.]picoline (ˈpɪkəˌliːn; -lɪn) n (Elements & Compounds) a liquid derivative of pyridine found in bone oil and coal tar; methylpyridene. Formula: C5H4N(CH3)[C19: from Latin pic-, pix pitch2 + -ol2 + -ine2] picolinic adjpic•o•line (ˈpɪk əˌlin, -lɪn)
n. any of three liquid isomers of pyridine having the formula C6H7N, obtained from coal tar and used as a solvent. [1850–55; < Latin pic- (s. of pix) pitch2 + -ol2 + -ine2]
picoline
picoline[′pik·ə‚lēn] (organic chemistry) C5H4N(CH3) Family of colorless liquid isomers, soluble in water and alcohol; the alpha form, boiling at 129°C, is used as a solvent and chemical intermediate, and is also known as 2-methyl pyridine; the beta form, boiling at 143.5°C, is used as a solvent for chemical synthesis reactions, to make nicotinic acid, and in fabric waterproofing, and is also known as 3-methyl pyridine; the gamma form, boiling at 143.1°C, is used as a solvent for chemical synthesis reactions and in fabric waterproofing. |