Issue 40, 2012

Facile formation and redox of benzoxazole-2-thiolate-bridged dinuclear Pt(ii/iii) complexes

Abstract

Reaction of [Pt(L)(μ-Cl)]2 (L = ppy (2-phenylpyridine) or bzq (benzo[h]quinoline)) with 2-mercaptobenzoxazole (NOSH) and NaOAc in THF at r.t. yields the dinuclear Pt(II) d8–d8 complexes [Pt2L2(μ-NOS-κN,S)2] (L = ppy, 1; L = bzq, 2) and the Pt(III) d7–d7 complexes [Pt2(ppy)2(μ-NOS-κN,S)2(NOS-κS)2] (L = ppy, 3; L = bzq, 4) in one pot. The C,N-cyclometalated ligand is chelating whereas the N,S-donating benzoxazole-2-thiolates doubly bridge the two metal centers. The Pt⋯Pt separations of 3.0204(3) and 2.9726(8) Å in 1 and 2 contract to 2.685(1) Å in 3 and 2.6923(3) Å in 4, respectively, when two S-bound thiolate ligands coordinate trans- to the Pt⋯Pt axis. However, cyclometalation is preserved and there is minimum perturbation of the bridging ligands. Complexes 3 and 4 can be also obtained by oxidative addition of the thiolate ligand. In the presence of NaBH4, 3 and 4 can be reduced to 1 and 2, respectively. At r.t., 1 and 2 exhibit intense orange-red luminescence at 625 nm and 631 nm, respectively. The electrochemical properties of 1–4 have been also discussed.

Graphical abstract: Facile formation and redox of benzoxazole-2-thiolate-bridged dinuclear Pt(ii/iii) complexes

Supplementary files

Article information

Article type
Paper
Submitted
17 May 2012
Accepted
16 Aug 2012
First published
20 Aug 2012

Dalton Trans., 2012,41, 12568-12576

Facile formation and redox of benzoxazole-2-thiolate-bridged dinuclear Pt(II/III) complexes

Z. Wang, L. Jiang, Z. Liu, C. R. R. Gan, Z. Liu, X. Zhang, J. Zhao and T. S. A. Hor, Dalton Trans., 2012, 41, 12568 DOI: 10.1039/C2DT31070H

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements