876064-12-9Relevant articles and documents
Synthetic and reaction chemistry of heteroatom stabilized boryl and cationic borylene complexes
Kays, Deborah L.,Rossin, Andrea,Day, Joanne K.,Ooi, Li-Ling,Aldridge, Simon
, p. 399 - 410 (2006)
The synthesis, spectroscopic and structural characterization of the aryloxy and amino functionalized chloroboryl complexes (η5-C 5R5)Fe(CO)2B(OMes)Cl (R = H, 2a; R = Me, 3a) and (η5-C5H5)Fe(CO)2B(N iPr2)Cl (7a) are reported. Compound 2a is shown to be a versatile substrate for further boron-centred substitution chemistry leading to the asymmetric boryl complexes (η5-C5H 5)Fe(CO)2B(OMes)ERn [ERn = OC 6H4tBu-4, 2c; ERn = SPh, 2d] with retention of the metal-boron bond. The reactivities of 2a, 3a and 7a towards the halide abstraction agent Na[BArf4] have also been examined, in order to investigate the potential for the generation of cationic heteroatom-stabilized terminal borylene complexes. The application of this methodology to the mesityloxy derivatives 2a and 3a gives rise to B-F containing products, presumably via fluoride abstraction from the [BArf 4]- counter-ion. By contrast, amino-functionalized complex 7a is more amenable to this approach, and the thermally robust terminal aminoborylene complex [(η5-C5H5)Fe(CO) 2B(NiPr2)][BArf4] (9) can be isolated in ca. 50% yield. The reactivity of 9 towards a range of nucleophilic and/or unsaturated reagents has been examined, with examples of addition, protonolysis and metathesis chemistries having been established. The Royal Society of Chemistry 2006.
