Ruthenium(II/III) mediated transformation of 1,2-bis(2′-pyridylmethyleneimino)benzene (L) to 2-(2′-benzimidazolyl)pyridine (L′H) and its in situ formed complexes with Ru(II): X-ray structure of trans-[Ru(PPh3)2(L′H)2](ClO4)2
作者:Dipankar Mishra、Subhendu Naskar、Raymond J. Butcher、Shyamal Kumar Chattopadhyay
DOI:10.1016/j.ica.2005.03.055
日期:2005.7
series of ruthenium (II) complexes of formulae trans-[Ru(PPh3)2(L′H)2](ClO4)2 (1), [Ru(bpy)(L′H)2](ClO4)2 (2), [Ru(bpy)2(L′H)](ClO4)2 (3), cis-[Ru(DMSO)2(L′H)2]Cl2 (4), and [Ru(L′H)3](PF6)2 (5) (where L′H = 2-(2′-benzimidazolyl)pyridine) have been synthesized by reaction of the appropriate ruthenium precursor with 1,2-bis(2′-pyridylmethyleneimino)benzene (L). The complexes were characterized by elemental
一系列具有反式-[Ru(PPh 3)2(L'H)2 ](ClO 4)2(1),[Ru(bpy)(L'H)2 ](ClO 4)2(2),[Ru(bpy)2(L'H)](ClO 4)2(3),顺式-[Ru(DMSO)2(L'H)2 ] Cl 2(4)和[ Ru(L'H)3 ](PF 6)2(5)(其中L'H = 2-(2'-苯并咪唑基)吡啶)是通过适当的钌前体与1,2-双(2'-吡啶基亚甲基亚氨基)苯(L)反应合成的。通过元素分析,光谱学和电化学数据对复合物进行表征。发现所有络合物都是抗磁性的,因此金属处于+2氧化态。通过单晶X射线衍射研究确定了反式-[Ru(PPh 3)2(L'H)2 ](ClO 4)2的分子结构。分子结构表明,Ru(II)位于具有N 4 P 2的八面体的反转中心协调领域。该配体充当双齿N,N'供体。配合物的电子光谱在可见光区域显示出很强的MLCT带。