| Abstract: | A wide range of potential ligand precursors and related compounds have been synthesized from ferrocenyldibromoborane and ferrocenylenebis(dibromoborane) via salt elimination reactions. These comprise ligand precursors suitable for the preparation of (i) ansa‐metallocenes such as FcB(η1‐C5H5)2] ( 2 ), FcB(1‐C9H7)2] ( 3 ), FcB(3‐C9H7)2] ( 4 ) and 1,1′‐fc{B(3‐C9H7)2}2] ( 11 ), (ii) constrained geometry complexes such as FcB(1‐C9H7)N(H)Ph] ( 7 ) and FcB(3‐C9H7)N(H)Ph] ( 8 ), (iii) ansa‐diamido complexes such as FcB(N(H)Ph)2] ( 9 ) as well as (iv) the related compounds FcB(Br)N(H)tBu] ( 5 ), FcB(Br)N(H)Ph] ( 6 ), 1,1′‐fc{B(Br)N(SiMe3)2}2] ( 12 ) and 1,1′‐fc{B(Br)NiPr2}2] ( 13 ) (Fc = ferrocenyl, fc = ferrocenylene, C5H5 = cyclopentadienyl, C9H7 = indenyl). All new compounds have been characterised by multinuclear NMR spectroscopic techniques and in the case of 7 and 12 by X‐ray diffraction methods. |
