84988-36-3Relevant articles and documents
Facile and reversible conversion of an ammonium tetraphenylborate salt, Fe(NO)2[PhP(OCH2CH2)2NH 2+]2[BPh4-]2, into an amine-triphenylborane adduct, Fe(NO)2[PhP(OCH2CH2) 2N(H)·BPh3]2
Mordenti, Laurence,Roustan, Jean-Louis,Riess, Jean G.
, p. 4503 - 4506 (2008/10/08)
The iron dinitrosyl bis(phosphane ammonium tetraphenylborate) Fe(NO)2[PhP(OCH2CH2)2NH 2+]2[BPh4-]2 (2) is converted, at room temperature, into the corresponding bis(phosphane amine-triphenylborane) adduct Fe(NO)2[PhP-(OCH2CH2) 2N(H)·BPh3]2 (3), in which cleavage of one of the phenyl rings of the tetraphenylborate anion has occurred. Compound 2 is obtained (i) by direct protonation of Fe(NO)2[PhP(OCH2CH2)2NH]2 (1) and subsequent reaction with NaBPh4, (ii) indirectly from the reaction of NaBPh4 with the trimetallic complex Fe(NO)2[PhP(OCH2CH2)2N(H)Fe(NO) 2I]2 (4), or (iii) from the reaction of NaBPh4 with the nonisolated adduct formed by mixing [Fe(NO)2I]2 (6) with the bicyclic aminophosphorane PhP(OCH2CH2)2N (7). Complex 3 was also obtained directly by complexation of adduct 1 by BPh3. The reaction of 3 with HCl and then with NaBPh4 easily regenerates complex 2. Variable-temperature 31P NMR spectroscopy of 3 in DMF reveals a stepwise and reversible dissociation of the two BPh3 groups.