627099-29-0Relevant articles and documents
1-Sila-[1]ferrocenophanes, structure and reactivity Ring-opening by reactions with boron halides
Wrackmeyer, Bernd,Ayazi, Anahid,Milius, Wolfgang,Herberhold, Max
, p. 180 - 187 (2007/10/03)
1-Sila-[1]ferrocenophanes (1-5) were studied with respect to their NMR spectroscopic parameters, in particular the coupling constants involving the carbon atom C(1) [1 J (13 C(1),13C(2,5)), 1 J (29Si, 13C(1)) and 1 J (57Fe,13C)]. The disiloxane 6, containing two 1-sila-[1]ferrocenophane units, possesses a linear Si-O-Si group, as shown by X-ray structural analysis, being different from the bent structure of the same compound that has been reported in the literature. Ring-opening reactions of the complexes 2-5 with some boron halides (PhBCl2, BCl3, BBr3 and BI3) gave the ferrocene derivatives 7-12, in which the cyclopentadienyl rings bear silyl and boryl groups, respectively. Two of these complexes (9a and 10) were treated with lithium diethylamide in a 1:1 molar ratio, and in both cases selective substitution at the boron atom was observed (13, 14). All products were characterised by their 1H-, 11B-, 13C- and 29Si-NMR data.