title: Preparation, separation, and characterization of ruthenium(II) thiocyanate linkage isomers.
abstract: The reaction of [(p-cym)Ru(bpy)Cl](+) (p-cym = eta(6)-p-cymene; bpy = 2,2'-bipyridine) with SCN(-) gives a mixture of the linkage isomers [(p-cym)Ru(bpy)(SCN)](+) and [(p-cym)Ru(bpy)(NCS)](+). The linkage isomers were efficiently separated by column chromatography on Hg(NO3)2-coated Al2O3. Both isomers were fully characterized by elemental analysis, (1)H NMR and IR spectroscopy, and X-ray crystallography. The equilibrium constant for the conversion of the S-bound to the N-bound isomer was determined to be 0.29(4) in methanol-d4 and 0.74(7) in acetone-d6, respectively, at 50 degrees C. Kinetic data for the linkage isomerization reaction are also reported.
authors.affiliation: Chemistry Department, The State University of New York at New Paltz, 1 Hawk Drive, New Paltz, New York 12561, USA.
authors.forename: Lucas
authors.initials: L
authors.lastname: Vandenburgh
authors.forename: Matthew R
authors.initials: MR
authors.lastname: Buck
authors.forename: Daniel A
authors.initials: DA
authors.lastname: Freedman