宁夏11选5

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宁夏11选5

有机锌化合物的反应和介绍

在下列许多反应中,有机锌化合物都作为中间体参与反应:

1、XIMENGSI–SHIMISIFANYINGZHONG,KABIN(DIANJIAJI)DIANHUAXINHEXITINGFANYINGDEDAOHUANBINGWAN。

宁夏11选52、YU1863NIANFAXIANDEFrankland-DuppaFANYINGZHONG,CAOSUANZHI(ROCOCOOR)HELUDAIWANTINGR’X、XINHEYANSUANFANYING,SHENGCHENGα-QIANGJISUOSUANZHIRR’COHCOOR[8]

宁夏11选53、YIGUIFULIZI(Acetylides)XINYANDEFANYING。

4、有机锌试剂对于羰基的加成反应。1899年发现的Barbier反应使用锌代替镁进行格氏加成反应,而该反应更温和;反应条件更简单。有机卤镁试剂进行加成反应时,任何水的存在将导致反应无法进行;然而Babier反应甚至能够在水存在下进行反应。有机锌宁夏11选5试剂的劣势在于亲核性弱于格氏试剂。在所有12族元素中,锌是最具活性的。商业可售的二烃基锌化合物包括:二甲基锌、二乙基锌和二苯基锌。这些试剂价格都昂贵且难于操作和控制。在一项研究中,[9][10] 活性有机锌化合物可通过更廉价的有机溴化合物(Organobromine)前体获得:

5、LEIFUERMACIJIFANYINGTONGGUOXINLUZHONGJIANTIZHUANHUAα-LUDAIZHIHEQUANDEDAOβ-QIANGJIZHI。

YOUJIXINHUAHEWUSHIZHIHANYOUTAN-XINHUAXUEJIANDEYILEIYOUJIHUAHEWU。YOUJIXINHUAXUESHIYIMENYANJIUYOUJIXINHUAHEWULIHUAXINGZHI、HECHENGHEFANYINGDEXUEKE。[1][2][3][4]  DIYIGEBEIFAXIANHEZHIBEIDEYOUJIXINHUAHEWUSHIERYIJIXIN(Diethylzinc)(YOUEdward FranklandYU1849NIANFAXIAN)。TAHAISHIDIYIGEBEIFAXIANJUYOUJINSHU-TANσJIANDEHUAHEWU。XUDUOYOUJIXINHUAHEWUDOUSHIYIRANDEERNANYICAOZUODE(DADUOSHUYOUJIRONGJITONGYANGKERANERCUNZAIANQUANYINHUAN)。YOUJIXINHUAHEWUDADUOYIYUYANGHUA,QIERONGYUZHIZIXINGRONGJISHIHUIFASHENGFENJIE。ZAIXUDUOFANYINGZHONG,YOUJIXINSHIJIDOUXUYAOXIANZHIXIANYONGERBUNENGBEIFENLICHUNHUAHUOCUNFANGTAIJIU。SUOYOUSHIYONGYOUJIXINSHIJIDEFANYINGDOUXUYAOZAIDUOXINGQITIBAOHUXIAJINXING,RUDANQIHUOYAQI。  YOUJIXINHUAHEWUZUICHANGJIANDEYANGHUATAIWEI+2JIA。TAKEYIBEIFENWEISANZHONGLEIXING:YOUJIXINLUHUAHEWU(R-Zn-X,QIZHONGXDAIBIAOLUSUYUANZI);ERTINGJIXINHUAHEWU(R-Zn-R,QIZHONGRDAIBIAOWANJIHUOFANGJI);XINSUANLIYANHUOXINSUANMEIYAN(M+R3Zn-,QIZHONGMDAIBIAOLIHUOMEI)。 YOUYUTANHEXINYUANSUDEDIANFUXINGBUTONG:(TANWEI2.55;XINWEI1.65),TAN-XINHUAXUEJIANDEJIXINGZHIXIANGTANYUANZI。ERTINGJIXINHUAHEWUTONGCHANGYIDANTIXINGTAICUNZAI,ERYOUJIXINLUHUAHEWUZEKETONGGUOLUSUJIANQIAOXINGCHENGJUHEXINGTAI,GAIXINGTAILEISIYUGESHISHIJIHEGESHISHIJIDEDESchlenkPINGHENG(Schlenk equilibrium)。

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