Synthesis and structural characterization of bis-cyclometalated complexes [M(ptpy)2(S2COCH3)] (M = Rh, Ir; ptpy = 2-(p-tolyl)pyridinato)

The synthesis of the bis-cyclometalated complexes [M(ptpy)2(S2COCH3)] (M = Rh, 1; M = Ir, 2; ptpy = 2-(p-tolyl)pyridinato) from [{M(μ-Cl)(ptpy)2}2], carbon disulfide and sodium methanolate as the base are described. Compound 1 and 2, respectively, were crystallized from dichloromethane/methanol and the molecular structures of both complexes were confirmed by single-crystal X-ray diffraction studies (both monoclinic, P21/c). The emission spectrum of 1 exhibited the new compound as a red-emitting complex.

Graphical abstractThe synthesis of bis-cyclometalated complexes [M(ptpy)2(S2COCH3)] (M = Rh, 1; M = Ir, 2; ptpy = 2-(p-tolyl)pyridinato) from [{M(μ-Cl)(ptpy)2}2], carbon disulfide, and sodium methanolate as the base is described. The molecular structures of the new compounds were confirmed by single-crystal X-ray diffraction studies.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Bis-cyclometalated complexes [M(ptpy)2(S2COCH3)] (M = Rh, Ir) were prepared from [{M(μ-Cl)(ptpy)2}2], CS2 and NaOCH3. ► X-ray structure determination shows trans-N,N-cis-C,C-cis-S,S configuration for both compounds. ► The Rh compound is a weak red emitter.