The reaction of the reduced asymmetric compartmental proligand 2-[(2-dimethylaminoethyl)ethylamino]methyl}-4-methyl-6-[(pyridin-2-ylmethyl)amino]methyl}phenol, HL4 with nickel(II) acetate in the presence of non-coordinating anions gave dinuclear nickel(II) complexes. The crystal structures of [Ni2L6(OAc)(μ-OAc)(OH2)(CH3OH)][PF6], 2, [Ni2L4(μ-OAc)2(CH3OH)][PF6], 3, [Ni2L4(μ-OAc)2(OH2)(CH3OH)][PF6], 4, and [Ni2L4(μ-OAc)2(CH3OH)2][BPh4], 5, are reported. 2-[(2-Dimethylaminoethylamino)methyl]-6-[(2-dimethylaminoethyl)ethylamino]methyl}-4-methylphenol, HL5, was found to react with Ni(ClO4)2·4H2O and NaBPh4 in the presence of urea. to give [Ni2L5(OH)(OH2)2(urea)][BPh4]2, 6, the dinuclear core of which bears some resemblance to that of the active site in urease. The crystal structure reveals the presence of a hydroxo-bridge and an O-bonded molecule of urea.
将还原的非对称舱室前体
配体2-[(2-二甲基
氨基乙基)乙
氨基]甲基}-4-甲基-6-[(
吡啶-2-基甲基)
氨基]甲基}
苯酚,HL4与
乙酸镍(II)在非配位阴离子的存在下反应,得到了二核
镍(II)配合物。报道了[Ni2L6(OAc)(μ-OAc)(OH2)(CH3OH)][PF6],2,[Ni2L4(μ-OAc)2(CH3OH)][PF6],3,[Ni2L4(μ-OAc)2(OH2)(CH3OH)][PF6],4,以及[Ni2L4(μ-OAc)2(CH3OH)2][BPh4],5的晶体结构。发现2-[(2-二甲基
氨基乙基
氨基)甲基]-6-[(2-二甲基
氨基乙基)乙
氨基]甲基}-4-甲基
苯酚,HL5与Ni(
ClO4)2·4H2O和NaBPh4在
尿素的存在下反应,生成[Ni2L5(OH)(OH2)2(
尿素)][BPh4]2,6,其二核核心与
脲酶的活性位点有一定相似性。晶体结构揭示了羟基桥接和一个O-结合
尿素分子的存在。