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首页> 外文期刊>Acta crystallographica. Section C, Structural chemistry. >Synthesis and structures of ruthenium di- and tricarbonyl complexes derived from 4,5-diazafluoren-9-one
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Synthesis and structures of ruthenium di- and tricarbonyl complexes derived from 4,5-diazafluoren-9-one

机译:4,5-二氮杂芴-9-one衍生的钌二羰基和三羰基络合物的合成与结构

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Carbon monoxide (CO) has recently been shown to impart beneficial effects in mammalian physiology and considerable research attention is now being directed toward metal–carbonyl complexes as a means of delivering CO to biological targets. Two ruthenium carbonyl complexes, namely trans-dicarbonyldichlorido(4,5-diazafluoren-9-one-κ2N,N′)ruthenium(II), [RuCl2(C11H6N2O)(CO)2], (1), and fac-tricarbonyldichlorido(4,5-diazafluoren-9-one-κN)ruthenium(II), [RuCl2(C11H6N2O)(CO)3], (2), have been isolated and structurally characterized. In the case of complex (1), the trans-directing effect of the CO ligands allows bidentate coordination of the 4,5-diazafluoren-9-one (dafo) ligand despite a larger bite distance between the N-donor atoms. In complex (2), the cis disposition of two chloride ligands restricts the ability of the dafo molecule to bind ruthenium in a bidentate fashion. Both complexes exhibit well defined 1H NMR spectra confirming the diamagnetic ground state of RuII and display a strong absorption band around 300?nm in the UV.
机译:一氧化碳(CO)近期已被证明可以对哺乳动物的生理产生有益的影响,并且目前大量的研究注意力都集中在金属-羰基配合物上,以将CO传递到生物靶标中。两种羰基钌络合物,即反式二羰基二氯基(4,5-二氮杂芴-9-一个-κ2N,N')钌(II),[RuCl2(C11H6N2O)(CO)2],(1)和fac-三羰基二氯基( 4,5-二氮杂芴-9-一个-κN)钌(II)[RuCl2(C11H6N2O)(CO)3],(2)已被分离并进行结构表征。在配合物(1)的情况下,尽管N-供体原子之间的咬合距离较大,但是CO配体的反式作用允许4,5-二氮杂芴-9-(dafo)配体的双齿配位。在配合物(2)中,两个氯化物配体的顺式排列限制了dafo分子以双齿方式结合钌的能力。两种络合物均显示出明确的1H NMR光谱,证实了RuII的反磁性基态,并在UV中显示了约300?nm的强吸收带。

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