Issue 25, 2019

A novel coordination mode of κ1-N-Br-pyridylbenz-(imida, oxa or othia)-zole to Pt(ii): synthesis, characterization, electrochemical and structural analysis

Abstract

Herein, three novel Pt(II) complexes with formula [trans-Pt(Br-PyBenz-X)(Cl)2(DMSO)] (1–3) having Br-pyridylbenz-(imida, oxa or othia)-zole (L1–3) derivatives as potential bidentate ligands, under an unusual κ1-N-coordination mode are reported. All compounds were obtained straightforwardly via reaction of corresponding LPB1–3 and [Pt(Cl)2(DMSO)2] (DMSO = dimethyl sulfoxide), at 100 °C in acetonitrile, respectively. 1–3 complexes were characterized by analytical and spectroscopic data: melting point, FT-IR, Raman, UV/Vis and NMR experiments. Cyclic voltammetry studies show an irreversible two-electron process at −0.50 and −0.51 V, which was ascribed to the Pt(II)/Pt(IV) couple, for complexes 2 and 3. The crystal structure of complex 2 was elucidated by single-crystal X-ray diffraction, where the platinum atom exhibits a square plane geometry, where LPB2 adopts an unusual mono-coordinated mode via an N-κ1-benzoxazole ring. According to DFT calculations the first N-coordination exchanging one DMSO molecule is favourable, while the second N-coordination is highly impeded.

Graphical abstract: A novel coordination mode of κ1-N-Br-pyridylbenz-(imida, oxa or othia)-zole to Pt(ii): synthesis, characterization, electrochemical and structural analysis

Supplementary files

Article information

Article type
Paper
Submitted
11 Mar 2019
Accepted
22 Apr 2019
First published
07 May 2019
This article is Open Access
Creative Commons BY license

RSC Adv., 2019,9, 14033-14039

A novel coordination mode of κ1-N-Br-pyridylbenz-(imida, oxa or othia)-zole to Pt(II): synthesis, characterization, electrochemical and structural analysis

J. Nicasio-Collazo, G. Ramírez-García, M. Flores-Álamo, S. Gutiérrez-Granados, J. M. Peralta-Hernández, J. L. Maldonado, J. O. C. Jimenez-Halla and O. Serrano, RSC Adv., 2019, 9, 14033 DOI: 10.1039/C9RA01856E

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