Synthesis of cationic diiron complexes bridged by a base-stabilized gallium atom [Fp2(μ-Ga·Do2)]+X- (Fp = (η-C5H5)Fe(CO)2, Do2 = 2,2′-bipyridine, N,N,N′,N′-tetramethylethylenediamine, 1,10-phenanthroline, (4-(dimethylamino)pyridine)2

Keiji Ueno, Takahito Watanabe, Hiroshi Ogino

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13 Citations (Scopus)


Addition of 2,2′-bipyridine (bpy) to an acetonitrile solution of Fp2GaCl (1: Fp = CpFe(CO)2; Cp = η-C5H5) afforded quantitatively a salt consisting of a diiron cation bridged by a Ga·bpy fragment [Fp2(μ-Ga·bpy)]+ ([2a]+) and μ-GaCl2 diiron anion [Fp2(μ-GaCl2)]- ([3]-). The reaction of 1 with Do2 (Do2 = N,N,N′,N′-tetramethylethylenediamine (tmeda), 1,10-phenanthroline (phen), and (4-(dimethylamino)pyridine)2 (= dmap2)) in the presence of 1 equiv of NaBPh4 in acetonitrile afforded [Fp2(μ-Ga·Do2)]+BPh4 - (Do2 = tmeda (2b), phen (2c), and (dmap)2 (2d)). Cation [2a-d]+ is the first example of a dinuclear complex bridged by a base-coordinated gallium atom Ga·Do2 (Do = Lewis base). X-ray crystal structure analysis of [2a][3]·CH3CN revealed that the Fe-Ga bond lengths (2.3969(16) and 2.4037(14) A) in [2a]+ are shorter than those of [3]- (2.4234(13) and 2.4359(15) Å), but within the range previously observed for Fp-gallyl complexes (2.36-2.46 Å). The Ga - Cl bonds in [3]- (2.3259(19) and 2.3537(19) A) are longer than those of known chlorogallyl complexes (2.18-2.29 Å).

Original languageEnglish
Pages (from-to)5679-5682
Number of pages4
Issue number26
Publication statusPublished - 2000 Dec 25

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry

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