676226-45-2Relevant academic research and scientific papers
Synthesis and molecular structures of nitrosoarene metalloporphyrin complexes of ruthenium
Lee, Jonghyuk,Twamley, Brendan,Richter-Addo, George B.
, p. 189 - 196 (2007/10/03)
Several new ruthenium porphyrins containing nitrosoarene ligands have been synthesized and characterized by IR and 1H NMR spectroscopy, and by single-crystal X-ray crystallography. Bis-nitrosoarene complexes of the form (por)Ru(ArNO)2 (Ar = aryl group; por = TPP, TTP; TPP = tetraphenylporphyrinato dianion, TTP = tetratolylporphyrinato dianion) were prepared in good yields from the reaction of the nitrosoarenes with (por)Ru(CO). The IR spectra of the complexes (as KBr pellets) display new bands in the 1346-1350 cm-1 region due to vNO. Reactions of the (por)Ru(ArNO)2 complexes with excess pyridine and 1-methylimidazole produce the mono-nitrosoarene complexes (por)Ru(ArNO)(py) and (por)Ru(ArNO)(1-MeIm), respectively. The IR spectra of these mono-nitrosoarene complexes reveal a lowering of vNO by 14-44 cm-1, a feature consistent with the replacement of one of the π-acid ArNO ligands with the more basic pyridine and 1-MeIm ligands. The solid-state molecular structures of two members of each of the three classes of compounds, namely (por)Ru(ArNO)2, (por)Ru(ArNO)(py) and (por)Ru(ArNO)(1-MeIm) were determined by single-crystal X-ray diffraction, and reveal the N-binding mode of the ArNO ligands.
