In the title compound, [Ru(CH3OCS2)2(C18H15P)2], the Ru(II) atom is in a distorted octa-hedral coordination by two xanthate anions (CH3OCS2) and two tri-phenyl-phosphane (PPh3) ligands. Both bidentate xanthate ligands coordinate the Ru(II) atom with two slightly different Ru-S bond lengths but with virtually equal bite angles [71.57 (4) and 71.58 (3)°]. The packing of the complexes is assured by C-H⋯O and C-H⋯π inter-actions.
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http://dx.doi.org/10.1107/S1600536813016735 | DOI Listing |
J Org Chem
October 2024
Departamento de Química Orgánica y Farmacéutica, Facultad de Farmacia, Universidad de Sevilla, C/Profesor García González, 2, 41012 Sevilla, Spain.
The stereoselective synthesis of two distinct types of -symmetric chiral bis-sulfoxides, 1,3- and 1,5-bis(sulfinyl) derivatives, has been achieved based on the DAG methodology. The 1,5-bis(sulfinyl) derivatives constitute a new family of tridentate chiral ligands thanks to the presence of an additional sulfenyl or sulfinyl group in the carbon chain acting as a bridge. A systematic development and optimization of two synthetic routes, one for each ligand family, have been undertaken, highlighting the strategic utilization of Horeau's law to enhance enantioselectivity.
View Article and Find Full Text PDFAcc Chem Res
August 2024
Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, Department of Chemistry, School of Science and Research Center for Industries of the Future, Westlake University, Hangzhou, Zhejiang 310030, China.
ConspectusLewis π acids, particularly high-valent transition metals with vacant orbitals, can coordinate with unsaturated compounds such as alkynes and alkenes by means of π-bonding. The coordination enhances the electrophilicity of the bound compounds, thereby facilitating reactions─such as nucleophilic addition─that take place at the ligated carbon-carbon multiple bonds. This activation phenomenon occurs at the ligand rather than at the metal atom, and it has been extensively utilized in the development of catalytic methods.
View Article and Find Full Text PDFOrg Biomol Chem
July 2024
State Key Laboratory of Fine Chemicals, Frontiers Science Centre for Smart Materials, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, P. R. China.
Heavy atom-free triplet photosensitizers (PSs) can overcome the high cost and biological toxicity of traditional molecular systems containing heavy atoms (such as Pt(II), Ir(III), Ru(II), Pd(II), Lu(III), I, or Br atoms) and, therefore, are developing rapidly. Connecting a stable free radical to the chromophore can promote the intersystem crossing (ISC) process through electron spin exchange interaction to produce the triplet state of the chromophore or the doublet (D) and quartet (Q) states when taking the whole spin system into account. These molecular systems based on the radical enhanced ISC (REISC) mechanism are important in the field of heavy atom-free triplet PSs.
View Article and Find Full Text PDFInorg Chem
May 2024
Department of Chemical Sciences and Centre for Functional Materials, University of Huddersfield, Queensgate, Huddersfield HD1 3DH, U.K.
Photochemical ligand release from metal complexes may be exploited in the development of novel photoactivated chemotherapy agents for the treatment of cancer and other diseases. Highly intriguing photochemical behavior is reported for two ruthenium(II) complexes bearing conformationally flexible 1,2,3-triazole-based ligands incorporating a methylene spacer to form 6-membered chelate rings. [Ru(bpy)(pictz)] () and [Ru(bpy)(btzm)] () (bpy = 2,2'-bipyridyl; pictz = 1-(picolyl)-4-phenyl-1,2,3-triazole; btzm = bis(4-phenyl-1,2,3-triazol-4-yl)methane) exhibit coordination by the triazole ring through the less basic N2 atom as a consequence of chelation and readily undergo photochemical release of the pictz and btzm ligands (ϕ = 0.
View Article and Find Full Text PDFRSC Adv
March 2024
School of Chemistry and Physics, University of KwaZulu-Natal Private Bag X01, Scottsville Pietermaritzburg 3209 South Africa
Treatments of -(1-benzo[]imidazol-2-yl)pyrazine-2-carboxamide (HL) and -(benzo[]thiazol-2-yl)pyrazine-2-carboxamide carboxamide ligands (HL) with [Ru(-cymene)Cl] and [Ru(PPh)Cl] precursors afforded the respective Ru(ii) complexes [Ru(L)(-cymene)Cl] (Ru1), [Ru(L)(-cymene)Cl] (Ru2), [Ru(L)(PPh)Cl] (Ru3), and [Ru(L)(PPh)Cl] (Ru4). These complexes were characterized by NMR, FT-IR spectroscopies, mass spectrometry, elemental analyses, and crystal X-ray crystallography for Ru2. The molecular structure of complex Ru2 contains one mono-anionic bidentate bound ligand and display pseudo-octahedral piano stool geometry around the Ru(ii) atom.
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