ACS South Jersey Local Section Meeting

March 2019 Dinner Meeting
March 19, 2019

Ruthenium(II) complexes of multidentate thioether and amine ligands

GorDan T. Reeves, Ph.D, MBA
Assistant Professor of Chemistry
Stockton University

The Lake House Restaurant
611 Taylor Road (on Iona Lake) Newfield, NJ 08344

Agenda:
5:30-6:30 P.M. Social Hour
6:30-7:30 P.M. Dinner
7:30 P.M. Seminar
$25 for members & guests
$10 for students
(check or cash accepted)

The tetradentate thioethers, 1,8-Bis(2'-pyridyl)-3,6 dithiaoctane (Pdto), o-phenylene-bis-(2'-pyridylethylsulfide) (Ppes), 1,9-Bis(2’-pyridyl)-3,7-dithianonane (Pdtn), and 1,10 Bis(2’-pyridyl)-3,8-dithiadecane (Pdtd) were used to form dinuclear ruthenium(II) complexes of the type [{Ru(L1)}2(μ-Cl)2]2+ via reaction with RuCl3 . xH2O. Upon reaction of the dinuclear complexes with several pyrazole-, indazole-, and benzimidazole-based diimine ligands and the triimine ligand 2,6-bis(N’-methylbenzimidazolyl)-pyridine (Me2Bzimpy), facile symmetrical bridge cleavage occurs, producing mononuclear complexes of the form [Ru(L1)(L2)]2+, where L1 is one of the four tetradentate thioether ligands and L2 is one the diimine or triimine ligands.  A second method of producing the mononuclear [Ru(L1)(L2)]2+ complexes involves the reaction of Ru(L2)(DMSO)Cl2 with L1 under methanolic conditions. In the mononuclear complexes, one of the pyridine arms of the tetradentate thioether is forced to be uncoordinated, due to the firmly hexacoordinate nature of Ru(II). These complexes are compared in terms of their redox thermodynamics and luminescence properties. Some of the complexes display the phenomenon of conglomerate crystallization, as revealed by their X-ray crystallography.

The March meeting will be held at The Lake House Restaurant in Newfield, NJ. The restaurant is located at 611 Taylor Road (on Iona Lake) Newfield, NJ 08344.

Please call the restaurant at 856-694-5700 for directions if needed. You can also check their web site at

http://www.lakehouseiona.com/