title: Boron complexes of redox-active diimine ligand.
abstract: Boron complexes (dpp-bian)BCl2 (1) and (dpp-bian)BX (X = Cl, 2; Br, 3) (dpp-bian = 1,2-bis[(2,6-diisopropylphenyl)imino]acenaphthene) have been prepared by reacting mixtures dpp-bian-BX3 (1 : 1) with one (1) and two (2 and 3) equivalents of sodium correspondingly in toluene. Complexes 2 and 3 reveal a moderate stability against ambient oxygen and moisture. The reaction of complex 2 with PhC≡CLi gave compound (dpp-bian)B-C≡CPh (4). Treatment of 2 with potassium hydroxide afforded complexes (dpp-bian)B-OH (5) and (dpp-bian)B-OK (6). Boron amide (dpp-bian)B-NH2 (7) has been isolated from the reaction of compound 1 with sodium in liquid ammonia. Borane (dpp-bian)B-H (8) can be prepared by the reactions of complexes 2 and 3 with LiAlH4. Diamagnetic compounds 2-8 have been characterized by IR, (1)H and (11)B NMR spectroscopy; paramagnetic complex 1 has been studied by the ESR method. Molecular structures of 2, 5, 7 and 8 have been determined by X-ray crystallography.
authors: G. A. Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences, Tropinina str. 49, 603950, Nizhny Novgorod, Russian Federation. igorfed@iomc.ras.ru
authors: Igor L
authors: IL
authors: Fedushkin
authors: Olga V
authors: OV
authors: Markina
authors: Anton N
authors: AN
authors: Lukoyanov
authors: Alexander G
authors: AG
authors: Morozov
authors: Evgenii V
authors: EV
authors: Baranov
authors: Maxim O
authors: MO
authors: Maslov
authors: Sergey Yu
authors: SY
authors: Ketkov