Nucleophilic Aromatic Substitution of Bis(pentafluorophenyl)mercury with Various Bulky Nucleophiles and the Structures of [Hg(C6F4X-4)2] (X=cyclo-C5H10N, OCH(CH3)2, OC(CH3)3)
作者:Glen B. Deacon、Peter C. Junk、Jenny Luu
DOI:10.1071/ch13227
日期:——
Reactions of bis(pentafluorophenyl)mercury with piperidine, sodium iso-propoxide or sodium tert-butoxide have yielded the corresponding 4-substituted tetrafluorophenylmercurials, [Hg(C6F4X-4)2] (X = cyclo-C5H10N (1), OCH(CH3)2 (2), OC(CH3)3 (3)), in reasonable yields but the bulkier nucleophiles, cis-2,6-dimethylpiperidine and 2,6-di-iso-propylphenolate (from sodium 2,6-di-iso-propylphenolate) decomposed
双(五氟苯基)汞与哌啶,异丙醇钠或叔丁醇钠的反应已生成相应的4-取代的四氟苯基汞[Hg(C 6 F 4 X-4)2 ](X = 环-C 5 H 10 N(1),OCH(CH 3)2(2),OC(CH 3)3(3)),收率合理,但亲核试剂顺式-2,6-二甲基哌啶和2,6-二异-苯酚丙酯(2,6-二异钠-苯甲酸丙酯)将汞分解为五氟苯。在甲醇中用另一种笨重的亲核试剂2,6-二苯酚(来自2,6-二苯酚钠)处理双(五氟苯基)汞导致意外形成[Hg(C 6 F 4(OMe)-4)2 ](4)。所有汞的结构均具有线性的C–Hg–C立体化学结构和两个共平面的芳基环。在一系列复杂的超分子相互作用中,对于烷氧基取代的汞,可以观察到Hg = O键,但在双(2,3,5,6-四氟-4-哌啶子基苯基)汞的结构中没有Hg = N相互作用。