Reactions of the (2-pyridyl) pyrrolide platinum(II) complex driven by sterically encumbered chelation : A model for the reversible attack of alcohol at the coordinated carbon monoxide

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Jing-Lin Chen
  • Chen-Huey Lin
  • Jian-Hong Chen
  • Yuan-Chieh Chiu
  • Pi-Tai Chou
  • Cheng-Hsuan Lai
  • Gene-Hsiang Lee
  • Arthur J. Carty

Detail(s)

Original languageEnglish
Pages (from-to)5154-5161
Journal / PublicationInorganic Chemistry
Volume47
Issue number12
Online published20 May 2008
Publication statusPublished - 1 Jun 2008
Externally publishedYes

Abstract

Treatment of 3,5-bis(trifluoromethyl)-2-(2′-pyridyl)pyrrole (fpyroH) with Pt(DMSO)2Cl2 and Na2CO3 in THF solution gave a light-yellow complex denoted as [Pt(fpyro)2] (1). A single-crystal X-ray diffraction study on 1 revealed a large conformational distortion around the platinum(II) center, which is attributed to interligand repulsion between the pyridyl groups and the CF3 substituents of the nearby pyrrolides. Reaction of 1 with N- and C-donor ligands such as acetonitrile, pyridine, isocyanide, and CO affords the adducts [Pt(fpyro) 2(L)], L = NCMe (2), pyridine (3), CNBut (4), and CO (5), showing formation of one monodentate fpyro ligand by release of the strain energy. The variable-temperature 1H NMR studies showed a static structure for the N-substituted adducts 2 and 3, whereas the C-adducts 4 and 5 are shown to be more labile, displaying a pairwise exchange of bidentate and monodentate fpyro ligands in solution. Addition of ethanol to the coordinated CO in 5 during recrystallization is also established, affording an ethoxycarbonyl complex [Pt(fpyro)(fpyroH)(CO2Et)] (6), which was isolated as a crystalline solid and can be readily converted back to 5 and free ethanol upon dissolution at room temperature.  

Citation Format(s)

Reactions of the (2-pyridyl) pyrrolide platinum(II) complex driven by sterically encumbered chelation : A model for the reversible attack of alcohol at the coordinated carbon monoxide. / Chen, Jing-Lin; Lin, Chen-Huey; Chen, Jian-Hong; Chi, Yun; Chiu, Yuan-Chieh; Chou, Pi-Tai; Lai, Cheng-Hsuan; Lee, Gene-Hsiang; Carty, Arthur J.

In: Inorganic Chemistry, Vol. 47, No. 12, 01.06.2008, p. 5154-5161.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review