Rhenium(I) and (VII) complexes with cyclohex-1-enylolonium cation and bridging pyridyl derivatives are reported. Additionally, the CO-bridged pyridyl and their related compounds have shown interesting behaviour in their reactivity towards compounds containing two amino groups. The unusual cationic compound: (2,6-diaza-cyclohex-1-enylolonium)2-aza-benzoate (H2den), was isolated from the reaction mixture of 1,2-di(pyridin-2-yl)ethane-1,2-dione with propane-1,3-diamine in methanol. The latter ligand: H2den, was used in the synthesis of rhenium(I) complex in its reaction with [Re(CO)5Cl] that gave rise to novel rhenium(I) complex fac-[Re(CO)3(Hhdm)] (1). The surprising aspect in the formation of (1) is the modification of H2den which was stabilized into a coordinated six-membered pyrimidine ring, 1,4,5,6-tetrahydropyrimidin-2-yl)di(pyridin-2-yl)methanol (H2hdm) chelate. The derived ligand acts as a tridentate monoanionic N2,O-donor ligand towards the fac-[Re(CO)3]+ core. Surprisingly, the 2-aza-benzoate counter-ion that was present in the used ligand is not displayed in the crystal structure of complex 1, and might have been stabilized into 2-aza-benzoic acid (picolinic acid). The reaction of the potential tridentate N2,O-donor ligand 2,2′-dipyridylketone (dpk) with trans-[ReOI2(OEt)(PPh3)2] led to the isolation of [ReO3(dpk·OH)] (2). The ligand H2den and the rhenium complexes were spectroscopically characterized, and the structures of H2den, 1 and 2 were established by X-ray diffraction.

中文翻译：

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cyclohex-1-enylolonium 阳离子和桥连吡啶衍生物作为铼 (I) 和 (VII) 螯合物的配位模式

铼 (I) 和 (VII) 与环己-1-enylolonium 阳离子和桥连吡啶基衍生物的配合物被报道。此外，CO 桥连的吡啶基及其相关化合物在对含有两个氨基的化合物的反应性方面表现出有趣的行为。不寻常的阳离子化合物：(2,6-二氮杂-环己-1-enylolonium)2-氮杂-苯甲酸酯(H2den)，从1,2-二(吡啶-2-基)乙烷-1的反应混合物中分离出来， 2-二酮与丙烷-1,3-二胺的甲醇溶液。后一种配体：H2den，用于合成铼（I）配合物，与 [Re（CO）5Cl] 反应生成新型铼（I）配合物 fac-[Re(CO)3(Hhdm)] (1). (1) 的形成中令人惊讶的方面是 H2den 的修饰，它被稳定成一个配位的六元嘧啶环，1,4,5，6-四氢嘧啶-2-基)二(吡啶-2-基)甲醇(H2hdm)螯合物。衍生配体作为三齿单阴离子 N2,O-供体配体朝向 fac-[Re(CO)3]+ 核心。令人惊讶的是，所用配体中存在的 2-氮杂-苯甲酸反离子并未显示在配合物 1 的晶体结构中，并且可能已稳定化为 2-氮杂-苯甲酸（吡啶甲酸）。潜在的三齿 N2,O-供体配体 2,2'-二吡啶基酮 (dpk) 与反式-[ReOI2(OEt)(PPh3)2] 的反应导致 [ReO3(dpk·OH)] 的分离 (2) . 对配体H2den和铼配合物进行了光谱表征，并通过X射线衍射确定了H2den、1和2的结构。所用配体中存在的 2-氮杂-苯甲酸反离子未显示在配合物 1 的晶体结构中，可能已被稳定化为 2-氮杂-苯甲酸（吡啶甲酸）。潜在的三齿 N2,O-供体配体 2,2'-二吡啶基酮 (dpk) 与反式-[ReOI2(OEt)(PPh3)2] 的反应导致 [ReO3(dpk·OH)] 的分离 (2) . 对配体H2den和铼配合物进行了光谱表征，并通过X射线衍射确定了H2den、1和2的结构。所用配体中存在的 2-氮杂-苯甲酸反离子未显示在配合物 1 的晶体结构中，可能已被稳定化为 2-氮杂-苯甲酸（吡啶甲酸）。潜在的三齿 N2,O-供体配体 2,2'-二吡啶基酮 (dpk) 与反式-[ReOI2(OEt)(PPh3)2] 的反应导致 [ReO3(dpk·OH)] 的分离 (2) . 对配体H2den和铼配合物进行了光谱表征，并通过X射线衍射确定了H2den、1和2的结构。