The partially fluorinated cryptands FN2O4 and BenzoFN2O4, which are relatives of the [2.2.1]cryptand, were synthesized in good yields from 1,3-bis(bromomethyl)-2-fluorobenzene and diaza-18-crown-6 or benzodiaza-18-crown-6, respectively. These macrobicyclic ligands form very stable complexes with Ag(I) salts, and it was shown that close fluorinesilver interactions occur in solution as well as in the
[2.2.1] cryptand的亲代部分
氟化的cryptands FN 2 O 4和BenzoFN 2 O 4是由1,3-双(
溴甲基)-2-
氟苯和diaza-18-crown合成的高收率化合物。 -6或benzodiazaza-18-crown-6。这些大双环
配体与Ag(I)盐形成非常稳定的络合物,并且表明在溶液中以及在固态下都存在紧密的
氟银相互作用。有大量的实验证据:NMR竞争实验表明,FN 2 O 4的Ag +配合物比HN 2 O的稳定得多。4(两个
配体相同,除了在HN 2 O 4中一个
氟原子被一个氢原子代替);与各自的游离
配体FN 2 O 4( 1 J CF = 253 Hz)和BenzoFN 2相比,Ag + · FN 2 O 4和Ag + · BenzoFN 2 O 4的1 J CF耦合常数降低了10 Hz。 O 4。( 1焦耳CF= 252 Hz)。Ag + · FN 2 O