早教吧作业答案频道 -->英语-->
苯六甲酸517-60-2用途请问这个化合物的用途
题目详情
苯六甲酸 517-60-2 用途
请问这个化合物的用途
请问这个化合物的用途
▼优质解答
答案和解析
It crystallizes in fine silky needles and is soluble in water and alcohol.It is a very stable compound,chlorine,concentrated nitric acid and hydriodic acid having no action upon it.It is decomposed,on dry distillation,into carbon dioxide and pyromellitic acid,C10H6O3; when distilled with lime it gives carbon dioxide and benzene.Long digestion of the acid with excess of phosphorus pentachloride results in the formation of the acid chloride,which crystallizes in needles,melting at 190 °C.By heating the ammonium salt of the acid to 150-160 °C as long as ammonia is evolved,a mixture of paramide (mellimide),C6(CONH)3,and ammonium euchroate is obtained.The mixture may be separated by dissolving out the ammonium euchroate with water.Paramide is a white amorphous powder,insoluble in water and alcohol.
The high stability of mellitic acid salts and that they are the endproduct of the oxidation of polycyclic aromatic hydrocarbons,which are present in the solar system,made them a possible organic substance in Martian soil.[4]
The high stability of mellitic acid salts and that they are the endproduct of the oxidation of polycyclic aromatic hydrocarbons,which are present in the solar system,made them a possible organic substance in Martian soil.[4]
看了 苯六甲酸517-60-2用途...的网友还看了以下:
工程问题测试题急死了!一件工作,甲单独做10天完成,乙单独做15天完成,丙单独做20天完成.现在有 2020-04-25 …
武汉三初中七年及衔接练习第48页第3题一项工程甲独做30天完成,乙独做15天完成,丙独做20天完成 2020-04-27 …
先给20,再给10我财富不多、、1.单独完成某项工程,甲乙丙三人分别需要10小时,15小时,20小 2020-05-15 …
从学校到电影院相距5100千米.甲乙两人跑步相对而行.甲每分钟跑50米,乙每分钟跑60米.途中甲的 2020-05-16 …
甲,乙两人分别从相距6㎞的A,B两地出发,同向前进,甲在乙后面.如果他们同时出发,3小时后甲追上乙 2020-05-22 …
一项工程,甲队单独做需60天,乙队单独做需20天,现甲乙两队合作,中途各休息若干天,结果比原计划多 2020-05-23 …
从学校到电影院相距5070米.甲乙两人跑步分别从这两个地方同时出发相对而行.甲每分钟跑50米,乙每 2020-06-02 …
甲是乙运输公司的雇员,乙派甲承担一批货物的长途运输任务。由于途经甲的老家,甲便想顺路 2020-06-04 …
甲为了牟取私利,故意将一包面粉说成是毒品“白粉”,将其卖给乙,从中牟利3000元,请问甲的行为构成( 2020-06-04 …
一个水池装甲、乙、丙三根水管,单开甲管10小时可注满水池,单开乙管15小时可注满,单开丙管20小时 2020-06-05 …