Chemical and physical behaviour of heteroleptic 2,6-bis(1H-benzimidazol-2-yl)pyridine and 2,2′:6′,2″-terpyridine substituted tricyclophosphazene ruthenium(II) complexes

详细信息    查看全文

• 作者：Ross J. Davidson¹ ; Eric W. Ainscough ; ^{e.ainscough@massey.ac.nz" class="auth_mail" title="E-mail the corresponding author} ; Andrew M. Brodie ; ^{a.brodie@massey.ac.nz" class="auth_mail" title="E-mail the corresponding author} ; Geoffrey B. Jameson ; Mark R. Waterland
• 关键词：Phosphazene ; Ruthenium(II) ; 2 ; 2&prime ; 6&prime ; 2&Prime ; -terpyridine ; 2 ; 6-bis(1H-benzimidazol-2-yl)pyridine ; X-ray crystallography
• 刊名：Polyhedron
• 出版年：2016
• 出版时间：8 January 2016
• 年：2016
• 卷：103
• 期：part_PB
• 页码：217-226
• 全文大小：2457 K

文摘

Six complexes consisting of either 2,6-bis(1m>Hm>-benzimidazol-2-yl)pyridine (bbp) or 2,2′:6′,2″-terpyridine (tpy) moieties coordinated to ruthenium(II) and attached to (pentaphenoxy)cyclotriphosphazene were synthesised and structurally characterised by single-crystal X-ray diffraction techniques. Two of the complexes are the first examples of structurally characterised mono-protonated Ru(bbp)(tpy) complexes. The new complexes were studied by NMR, electronic absorption and vibration spectroscopy to gain an understanding of their physical characteristics. Remarkably the mono-deprotonated form of the bbp ligand, but only when attached to (pentaphenoxy)cyclotriphosphazene by a pyridyl phosphoester linker, shows an equivalence of the benzimidazole/benzimidazolate moieties on the NMR time scale, but not on the electronic time scale, as evidenced by UV–Vis and resonance Raman spectroscopy.