507229-55-2Relevant academic research and scientific papers
Stepwise assembly and structural characterization of oligonuclear ferrocene aggregates with boron-nitrogen backbone
Ma, Kuangbiao,Lerner, Hans-Wolfran,Scholz, Stefan,Bats, Jan W.,Bolte, Michael,Wagner, Matthias
, p. 94 - 105 (2002)
The reaction of FcBBr2 [1; Fc = (C5H5)Fe(C5H4)] with either 4-bromo-N,N-bis(trimethylsilyl)aniline or lithium N-tertbutyltrimethylsilylamide or sodium N,N-bis(trimethylsilyl)amide or 4-methoxyaniline in the appropriate stoichiometric ratio yields mononuclear {FcB(Br)N(SiMe3)(C6H4Br) (3); FcB(Br)N(SiMe3)(CMe3) (4)}, dinuclear {[FcB(Br)]2NSiMe3 (5); compounds 3-8 have been characterized by X-ray crystallography. Compound 7 features a puckered borazine core, while the BN backbone of 8 adopts a helical conformation. Treatment of 1,1′-fc(BBr2) 2 [10; fc = (C5H4)2Fe] with 4-bromo-N,N-bis(trimethylsilyl)aniline produces the 1,3-dibora-[3]ferrocenophane 13, in which a -B(Br)N(C6H 4Br)B(Br)- bridge spans both cyclopentadienyl rings. Polymeric byproducts have not been observed. These results indicate a strong preference for the formation of intramolecular BNB ansa-bridges over intermolecular BNB crosslinks.
