Structural comparison of geometrical isomers of N'-(1H-imidazol-4-ylmethylene)picolinohydrazide and their mononuclear and dinuclear cobalt(III) complexes
Structural comparison of geometrical isomers of N'-(1H-imidazol-4-ylmethylene)picolinohydrazide and their mononuclear and dinuclear cobalt(III) complexes
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DOI：
10.1016/j.rechem.2023.100798
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发表时间：
2023-01
影响因子：
2.3
通讯作者：
Daniel K. B. Acheampong;Y. Sunatsuki;Takayoshi Suzuki
中科院分区：
文献类型：
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作者：
Daniel K. B. Acheampong;Y. Sunatsuki;Takayoshi Suzuki
本文研究了N ′-（1H-咪唑-4-亚甲基）-吡啶甲酰肼（H_2Lim）的E-和Z-异构体的晶体结构和光谱性质。此外，H_2Lim与Co（BF_4）_2在甲醇中的有氧反应得到了单核钴配合物[Co（Z-HLim）_2] BF_4（1）和双核钴配合物[Co_2（μ-E-HLim）_3]（BF_4）_3（2），其中的三齿腙配体以μ-κ_2N，N ′：κ_2N ″，N ″ ″的方式桥接两个Co（III）中心，形成C_3对称的三螺旋配合物。
The crystal structures and spectroscopic properties of bothE- andZ-isomers ofN'-(1H-imidazol-4-ylmethylene)-picolinohydrazide (H2Lim) were investigated. In addition, an aerobic reaction of H2Lim with Co(BF4)2in methanol afforded a mononuclear cobalt(III) complex, [Co(Z-HLim)2]BF4(1) bearing tridentate hydrazonate ligands, and a dinuclear complex of [Co2(μ-E-HLim)3](BF4)3(2), where the hydrazonate bridged two CoIIIcenters in the μ-κ2N,N': κ2N'',N''' mode to form anC3-symmetry triple helicate complex.