羧酸 Carboxylic acid

（重定向自Carboxyl）

羧酸是带有羧基的有机化合物，通式是R-COOH。羧基的化学式为-C(=O)OH，通常写成-COOH或-CO₂H，它是由一个羰基（RR'C=O）和一个羟基（R-O-H）组成的官能基。羧酸是质子（H）授予者，也就是质子酸。

蚂蚁和蜜蜂的分泌液中含的甲酸H-COOH、使醋有酸味的乙酸CH₃-COOH……等都是常见的羧酸。拥有两个羧基的分子叫二酸，最简单的分子是由两个羧基结合而成的草酸(COOH)₂。其他像是可在柠檬中发现的柠檬酸和酸豆内含的酒石酸都是自然界中重要的羧酸。

羧基去质子化以后的共轭碱便是含有羧酸根负离子（-COO）的羧酸盐，与醇类混合经酯化反应后形成羧酸酯。羧酸离子因为共振而比较稳定，因此其酸性会比醇类物质高。

单词	carboxyl
释义	carboxyl /kɑː'bɒksaɪl//kɑrˈbɑksəl/ 英汉-汉英词典 n. [化]羧基形容词: carboxylic 词组 \| 习惯用语 carboxyl group 羧基英语例句库 The changes of intrinsic viscosity and end carboxyl group content with temperature and time were studied for poly(trimethylene terephthalate)(PTT), PET and CDP. 研究了聚对苯二甲酸丙二醇酯(PTT),PET,CDP在不同温度和时间下的特性粘数和端羧基含量的变化。 It was found that the compounds are adsorbed on the Ag surface through the carboxyl oxygen atoms, the benzene adopts acclivitous conformation, others lie low on the Ag surface. 在银溶胶表面上，羧基氧原子与银形成化学建，苯环是稍微倾斜地吸附在银胶面上，其它部分则平躺吸附于银溶胶表面。声明：以上例句、词性分类均由互联网资源自动生成，未经过人工审核，其表达内容亦不代表本软件的观点；若发现问题，欢迎向我们指正。原声例句 Osmosis-泌尿 This happens because albumin has acidic amino acids, like glutamate and aspartate, which have some carboxyl groups that are in the form of COO- or COOH. 这是因为白蛋白含有酸性氨基酸，比如谷氨酸与天冬氨酸，它们具有一些以COO-或COOH形式存在的羧基。 Osmosis-泌尿 When there's a high pH, or alkalosis, there are very few protons floating around, and so those carboxyl groups tend to be in the COO- form. 当血液pH值高或碱中毒时，几乎没有氢离子在周围漂浮，所以那些羧基倾向于呈COO-的形式。中文百科羧酸 Carboxylic acid （重定向自Carboxyl）羧酸是带有羧基的有机化合物，通式是R-COOH。羧基的化学式为-C(=O)OH，通常写成-COOH或-CO₂H，它是由一个羰基（RR'C=O）和一个羟基（R-O-H）组成的官能基。羧酸是质子（H）授予者，也就是质子酸。蚂蚁和蜜蜂的分泌液中含的甲酸H-COOH、使醋有酸味的乙酸CH₃-COOH……等都是常见的羧酸。拥有两个羧基的分子叫二酸，最简单的分子是由两个羧基结合而成的草酸(COOH)₂。其他像是可在柠檬中发现的柠檬酸和酸豆内含的酒石酸都是自然界中重要的羧酸。羧基去质子化以后的共轭碱便是含有羧酸根负离子（-COO）的羧酸盐，与醇类混合经酯化反应后形成羧酸酯。羧酸离子因为共振而比较稳定，因此其酸性会比醇类物质高。英语百科 Carboxylic acid 羧酸（重定向自Carboxyl） A carboxylic acid /ˌkɑːrbɒkˈsɪlɪk/ is an organic compound that contains a carboxyl group (C(O)OH). The general formula of a carboxylic acid is R–C(O)OH, with R referring to the rest of the (possibly quite large) molecule. Carboxylic acids occur widely and include the amino acids (which make up proteins) and acetic acid (which is part of vinegar and occurs in metabolism). 近义、反义、联想词近义词 n. group, radical, chemical group adj. carboxyl group 联想词 amine胺;alkyl烷基的，烃基的;monomer单体;methyl甲基;amino氨基的;hydrophobic狂犬病的,恐水病的,患恐水病的,不易被水沾湿的;ester酯;ligand配合基;molecule分子;ligands配体;peptide肽; 英英词典 carboxyl n. the univalent radical -COOH; present in and characteristic of organic acids synonymous： carboxyl group carboxyl adj. relating to or containing the carboxyl group or carboxyl radical synonymous： carboxylic
随便看	allowance for errors in estimates allowance for expansion allowance for family maintenance allowance for finish allowance for funds used during construction allowance for funeral expense allowance for funeral expenses allowance for inflation allowance for leeway allowance for low per capita income allowance for machining allowance formula allowance for necessary machine delay allowance for night duty allowance for obsolescence allowance for overtime duty allowance for overvaluation of branch inventory allowance for post secondary education allowance for preparation time of machine allowance for price declines allowance for price increase allowance for reduction of inventory allowance for reduction of inventory to market allowance for rotating parts allowance for sale

carboxyl /kɑː'bɒksaɪl//kɑrˈbɑksəl/

羧酸 Carboxylic acid

Carboxylic acid 羧酸

近义词

联想词