944160-06-9Relevant academic research and scientific papers
Borane B-C bond cleavage by a low-coordinate iron hydride complex and N-N bond cleavage by the hydridoborate product
Yu, Ying,Brennessel, William W.,Holland, Patrick L.
, p. 3217 - 3226 (2008/10/09)
The iron(II) hydride dimers [LRFe(μ-H)2FeL R] (LMe = 2,4-bis(2,6-diisopropylphenylimino)pent-3-yl; LtBu -2,2,6,6-tetramethyl-3,5-bis(2,6-diisopropylphenylimino)hept-4- yl) abstract hydrocarbyl groups from BR′3 (R′ = Et, Ph) to give LRFeR′ and LRFe(μ-H) 2BR′2. Mechanistic studies with R = R′ = Me are consistent with a process in which the hyride dimer opens one Fe-H bond, and subsequent B-H bond formation is concerted with dissociation of an Fe-H unit. Cleavage of boron-carbon bonds is likely to proceed at least in part from transient quaternary borate anions formed through disproportionation of HBEt3-. In a separate bond-breaking reaction, L MeFe(μ-H)2BEt2 reacts with N 2H4 to form a 1:1 adduct, which has been crystallographically characterized. Upon heating, it ejects H2 from the bridging hydrides and cleaves the N-N bond to form the diaminoborate complex LMeFe(μ-NH2)2BEt2. These novel bondbreaking reactions are facilitated by the low coordination number at the iron(II) center.
