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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
Authors: Tamasi, Gabriella 
Curci, Matia
Berrettini, Francesco
Justice, Nicholas
Sega, Alessandro 
Chiasserini, Luisa 
Cini, Renzo
Keywords: ruthenium; nitric oxide; pyrimidine; isonicotinate; photo-reactivity
Issue Date: 2008
Project: None 
The reaction of RuCl3(NO) center dot H2O with 4-methylpyrimidine (MePYM) and ethylisonicotinate (EINT), in absolute ethanol at 40-55 degrees C afforded crystalline trans-[ RuCl3(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 center dot center dot center dot 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 CH2Cl2 and CH3CN solutions within 24 h.
ISSN: 0162-0134
DOI: 10.1016/j.jinorgbio.2008.06.011
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