title: [RuII(NO+)]3+-core complexes with 4-methyl-pyrimidine and ethyl-isonicotinate: synthesis, X-ray structure, spectroscopy, and computational and NO-release studies upon UVA irradiation.
abstract: The reaction of RuCl(3)(NO).H(2)O with 4-methylpyrimidine (MePYM) and ethylisonicotinate (EINT), in absolute ethanol at 40-55 degrees C afforded crystalline trans-[RuCl(3)(NO)L(2)] complexes. Structural studies via X-ray diffraction, and spectroscopic methods (NMR, IR, UV-visible (UV-Vis)) revealed that the molecular structures have the two Ls in trans positions (axial) and the chloride anions and the NO(+) cation as equatorial ligands; pyrimidine...pyrimidine pairing pattern via two weak C-H...N interactions occur. The molecular structures for the EINT derivative was inferred from spectroscopy and computations. Under irradiation at 366 nm several solutions of the title compounds deliver NO via first order processes. Visible light (420-700 nm) does not produce significant NO release from CH(2)Cl(2) and CH(3)CN solutions within 24h.
authors.affiliation: Department of Chemical and Biosystem Sciences and Technologies, University of Siena, Via A. Moro 2, I-53100 Siena, Italy.
authors.forename: Gabriella
authors.initials: G
authors.lastname: Tamasi
authors.forename: Matia
authors.initials: M
authors.lastname: Curci
authors.forename: Francesco
authors.initials: F
authors.lastname: Berrettini
authors.forename: Nicholas
authors.initials: N
authors.lastname: Justice
authors.forename: Alessandro
authors.initials: A
authors.lastname: Sega
authors.forename: Luisa
authors.initials: L
authors.lastname: Chiasserini
authors.forename: Renzo
authors.initials: R
authors.lastname: Cini
mesh_terms: D018360:Crystallography, X-Ray; D007539:Isonicotinic Acids / Q000737:chemistry*; D008024:Ligands; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D011743:Pyrimidines / Q000737:chemistry*; D017975:Ruthenium Compounds / Q000737:chemistry*; D013057:Spectrum Analysis; D014466:Ultraviolet Rays; D014961:X-Ray Diffraction
chemical_list: D007539:Isonicotinic Acids; D008024:Ligands; D009942:Organometallic Compounds; D011743:Pyrimidines; D017975:Ruthenium Compounds; C094021:ethyl isonicotinate; C030986:pyrimidine