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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Proton-responsive naphthyridinone-based Ru(II )complexes and their reactivity with water and alcohols
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Proton-responsive naphthyridinone-based Ru(II )complexes and their reactivity with water and alcohols

机译:质子响应萘醌基Ru(II)复合物及其与水和醇的反应性

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We report the synthesis and reactivity of Ru-II complexes with a new naphthyridinone-substituted phosphine ligand, 7-(diisopropylphosphinomethyl)-1,8-naphthyridin-2(1H)-one (L-H), which contains two reactive sites that can potentially be deprotonated by a strong base: an NH proton of naphthyridinone and a methylene arm attached to the phosphine. In the absence of a base, the stable bis-ligated complex Ru(L-H)(2)Cl-2(1) containing two NH groups in the secondary coordination sphere is formed. Upon further reaction with a base, a doubly deprotonated, dimeric complex is obtained, [Ru-2(L*-H)(2)(L)(2)] (2), in which two of the four ligands undergo deprotonation at the NH (L), while the other two ligands are deprotonated at the methylene groups (L*-H) as confirmed by an X-ray diffraction study; intramolecular hydrogen bonding is present between the NH group of one ligand and an O-atom of another ligand in the dimeric structure, which stabilizes the observed geometry of the complex. Complex 2 reacts with protic solvents such as water or methanol generating aqua Ru(L)(2)(OH2)(2) (3) or methanol complexes Ru(L)(2)(MeOH)(2) (4), respectively, both exhibiting intramolecular H-bonded patterns with surrounding ligands at least in the solid state. These complexes react with benzyl alcohols to give aldehydes via base-free acceptorless dehydrogenation.
机译:我们报道了Ru-II复合物的合成和反应与新的萘啶酮取代的膦配体,7-(二异丙基膦酰基)-1,8-萘啶-2(1H) - 酮(LH),其含有可能潜在的两个反应性部位通过强碱脱硫:萘萘醌的NH质子和附着在膦上的亚甲基臂。在没有碱的情况下,形成含有二次配位球中的两个NH基团的稳定双连接的复合Ru(L-H)(2)Cl-2(1)。在与碱的进一步反应后,获得双质助催化的二聚体复合物,[Ru-2(L * -H)(2)(2)(2)](2),其中四种配体中的两种接受药物NH(L),而另外两个配体在甲基衍射研究证实的那样在亚甲基(L * -H)处脱位;分子内氢键存在于二聚体结构中的一种配体的NH基团和另一配体的O-原子之间,其稳定观察到的复合物的几何形状。复合物2与水或甲醇产生的质子溶剂如水或甲醇产生Aqua Ru(1)(2)(2)(2)(3)或甲醇络合物ru(1)(2)(2)(2)(2)(4)反应,两者都将与周围配体的分子内H键合图案至少在固态中。这些配合物与苄醇反应,通过无碱性的无碱性脱氢醛反应。

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