259684-69-0Relevant academic research and scientific papers
Oxidation of [M(η-C5H5)2], M = Cr, Fe or Co, by the new Bronsted acid H2O·B(C6F5)3 yielding the salts [M(η-C5H5)2]+A-, where A- = [(C6F5)3B(μ-OH)B(C6F 5)3]...
Doerrer, Linda H.,Green, Malcolm L. H.
, p. 4325 - 4329 (1999)
Title full: Oxidation of [M(η-C5H5)2], M = Cr, Fe or Co, by the new Bronsted acid H2O·B(C6F5)3 yielding the salts [M(η-C5H5)2]+A-, where A- = [(C6F5)3B(μ-OH)B(C6F 5)3]-. The Bronsted acids H2O·B(C6F5)3 and D2O·B(C6F5)3 have been synthesized. Reaction of neutral divalent metallocenes [M(η-C5H5)2], M = Cr, Fe or Co, with two equivalents of H2O·B(C6F5)3 2a resulted in metallocene oxidation and formation of salts containing [M(η-C5H5)2]+ cations together with the hydroxoborate anion [HOB(C6F5)3]- which is hydrogen bonded to the second acid equivalent, namely [M(η-C5H5)2][(F5C 6)3-BOH...H2OB(C6F 5)3], M = Cr 3a, Fe 4a or Co 5a. Treatment of one equivalent of 2a and one equivalent of B(C6F5)3 1 with [M(η-C5H5)2] yielded salts containing the same metallocene cations but now with μ-OH bridged anions, as in [M(η-C5H5)2][(F5C 6)3B(η-OH)B(C6F5)3], where M = Cr 3b or Co 5b. All products have been characterised by NMR spectroscopy, elemental analysis, and the single-crystal structures of 2a, 3a, 4a, and 5a have been determined. The Royal Society of Chemistry 1999.
