Reversible formation and cleavage of Pt→Ag dative bonds in a pre-organized cavity of a luminescent heteropolynuclear platinum(ii) complex

A U-shaped Pt Ag complex [Pt Ag (ppy) (Ph pz) ] with a pre-organized cavity (ppy = 2-phenylpridinate and Ph pz = 3,5-diphenylpyrazolate) and related complexes have been prepared. The Pt Ag complexes react with Ag(i) ions to give the corresponding Pt Ag complexes containing Pt→Ag dative bonds. It bec...

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Published in:Chemical communications (Cambridge, England) England), 2017-06, Vol.53 (48), p.6405-6408
Main Authors: Ueda, Misa, Horiuchi, Shinnosuke, Sakuda, Eri, Nakao, Yoshihide, Arikawa, Yasuhiro, Umakoshi, Keisuke
Format: Article
Language:English
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Summary:A U-shaped Pt Ag complex [Pt Ag (ppy) (Ph pz) ] with a pre-organized cavity (ppy = 2-phenylpridinate and Ph pz = 3,5-diphenylpyrazolate) and related complexes have been prepared. The Pt Ag complexes react with Ag(i) ions to give the corresponding Pt Ag complexes containing Pt→Ag dative bonds. It became obvious that the existence of the C(ipso) atom in the chelate ligand is important as the driving force for forming Pt→Ag dative bonds. However, once the Pt Ag complex is formed, the trapped Ag(i) ion is mainly stabilized by the Pt→Ag dative bonds, which are stronger than the Ag-C(ipso) bond. The trapped Ag(i) ion can be abstracted from the cavity selectively by adding an equivalent amount of chloride ion into the solution of Pt Ag complexes to reproduce the original Pt Ag complexes.
ISSN:1359-7345
1364-548X
DOI:10.1039/c7cc03447d