874496-39-6Relevant academic research and scientific papers
Cationic terminal borylene complexes: A synthetic and mechanistic investigation of m=b metathesis chemistry
Kays, Deborah L.,Day, Joanna K.,Ooi, Li-Ling,Aldridge, Simon
, p. 7457 - 7460 (2005)
(Chemical Equation Presented) Halide abstraction chemistry has been exploited to generate the cationic terminal borylene complex 1, which reacts with Ph3P=S or Ph3As=O to form 3 and 4. In the case of the corresponding reaction with Ph3P=O, the intermediate 2 can be isolated, which provides evidence for a two-step addition/substitution mechanism for the overall metathesis reaction.
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 (2007/10/03)
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.
