165605-12-9Relevant articles and documents
Synthesis, Characterization, and Molecular Structures of Diethylnitrosamine Metalloporphyrin Complexes of Iron, Ruthenium, and Osmium
Chen, Li,Yi, Geun-Bae,Wang, Li-Sheng,Dharmawardana, Udeni R.,Dart, Amelia C.,Khan, Masood A.,Richter-Addo, George B.
, p. 4677 - 4688 (2008/10/08)
Diethylnitrosamine reacts with [(TPP)Fe(THF)2]ClO4 (TPP = 5,10,15,20-tetraphenylporphyrinato dianion) in toluene to generate the bis-nitrosamine complex, [(TPP)Fe(Et2NNO)2]ClO4, in 96% isolated yield. The related [(TTP)Fe(Et2NNO)2]SbF6 (TTP = 5,10,15,20-tetra-p-torylporphyrinato dianion) complex is prepared in 70% isolated yield via a similar reaction in CH2Cl2. Reaction of [(TPP)Fe(Et2NNO)2]ClO4 in CH2Cl2 with NO gas results in the displacement of one of the Et2NNO ligands to give the air-sensitive and thermally sensitive [(TPP)Fe(NO)-(Et2NNO)]ClO4 derivative. Reaction of (OEP)Ru(CO) (OEP = 2,3,7,8,12,13,17,18-octaethylporphyrinato dianion) with NOBF4 in CH2Cl2 gives [(OEP)Ru(NO)(H2O)]BF4 as the final isolated product (after exposure to air) in 71% isolated yield. The aqua ligand is then displaced by Et2NNO in CH2Cl2 to give [(OEP)Ru(NO)(Et2NNO)]-BF4 in 82% isolated yield. The valence isoelectronic (OEP)Ru(CO)(Et2NNO) compound is prepared in 71% isolated yield by the addition of excess Et2NNO to (OEP)Ru(CO) in CH2Cl2. The nitrosyl amine complex [(OEP)-Ru(NO)(HNEt2)]BF4 is prepared (i) in 78% yield by diethylamine addition to [(OEP)Ru(NO)(H2O)]BF4 or (ii) in 71% isolated yield by diethylamine addition to [(OEP)Ru(NO)(Et2NNO)]BF4. The osmium nitrosamine complexes, (TTP)Os(CO)(Et2NNO) and (OEP)Os(CO)(Et2NNO), are prepared in 74% and 66% yields, respectively, by diethylnitrosamine addition to the precursor (porphyrin)Os(CO) compounds in CH2Cl2. The nitrosyl [(OEP)Os(NO)(Et2NNO)]BF4 derivative is prepared in quantitative yield (by IR and 1H NMR spectroscopy) by the reaction of (OEP)Os(CO)(Et2NNO) with NOBF4. Labeling studies using 15NOBF4, Et2N15NO, and Et2NN18O have been used to assign the nitrosyl and nitrosamine bands in the IR spectra of several of the complexes. The solid-state structures of [(TPP)Fe(THF)2]ClO4, [(TPP)Fe(Et2NNO)2]ClO4, [(OEP)Ru(NO)(H2O)]BF4, (OEP)Ru(CO)(Et2-NNO), and (TTP)Os(CO)(Et2NNO) have also been determined by single-crystal X-ray diffraction. The Et2NNO ligands display a rare η1-O binding mode in all three nitrosamine complexes.