Abstract
The structures of two isomers of the title compound, [RuCl2(C14H12N4)(C2H6OS)2], 2 and 3, are reported. Isomers 2 and 3 are produced by reaction of the pyridyl-triazole ligand 1-benzyl-4-(pyridin-2-yl)-1H-1,2,3-triazole (bpt) (1) with fac-[RuCl2(DMSO-S)3(DMSO-O)]. Reaction in acetone produces ca 95% 2, which is the OC-6-14 isomer, with cis DMSO and trans chlorido ligands, and 5% 3 (the OC-6-32 isomer, with cis DMSO and cis chlorido ligands, and the pyridyl moiety of bpt trans to DMSO). Reaction in refluxing toluene initially forms 2, which slowly isomerizes to 3.
Highlights
The structures of two isomers of the title compound, [RuCl2(C14H12N4)(C2H6OS)2], 2 and 3, are reported
As an extension of this work, we were interested in RuII pyridyltriazole complexes
Only a small number of RuII–pyridyltriazole complexes have been examined to ascertain whether incorporation of triazole could result in improvements compared to the polypyridine complexes
Summary
Many 1,2,3-triazole-based ligands have been prepared by copper(I) catalysis of reaction of alkynes with azides; see, for example, Crowley et al (2010). As an extension of this work, we were interested in RuII pyridyltriazole complexes. Triazole is a stronger acceptor analog of pyridine, because of its three electronegative nitrogen atoms, leading to Ru complexes with different photophysical and electrochemical properties (Schulze et al, 2009; Felici et al, 2009; Elliott et al, 2016). Our intention was to make an RuII complex with one or two pyridyltriazoles per metal atom along with weakly ligated coordination sites to facilitate other types of chemistry. Selected bond distances for complexes 2 and 3, the distance between Ru and the mean plane of the pyridyltriazole (A ), the N1—Ru—N2 angle, and the angle between the pyridyltriazole and benzyl mean planes (). Ru1—N1 (pyridine) Ru1—N2 (triazole) Ru1—Cl1 Ru1—Cl2 Ru1—S1 Ru1—S2 Ru1Á Á Ámean plane of pyridyltriazole N1—Ru—N2 pyridyltriazole planeÁ Á Ábenzyl plane. We did not observe any other materials in the NMR spectra or in the isolated products that were attributable to these isomers
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