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Showing 1 to 20 of 29 for “"nitrosyl"”.
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Aspects of organometallic chromium nitrosyl chemistry
… with HSnPh3 yields the first isolable chromium nitrosyl hydride, CpCr(N0)(PPh3)(H)(SnPh3). The solid-state molecular structure of the hydride complex has been established by X-ray methods. The reaction of CpCr(N0)(PPh3)I with Me3SiCH2MgC1 to obtain CpCr(N0)(PPh3)CH2SiMe3 has been studied in some …
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Heterocumulene insertions with group 6 Diaryl Nitrosyl complexes
Treatment of the 16-electron complexes Cp*M(NO)(aryl)2 (Cp* = i5-05Me5; M =Mo, W; aryl = phenyl, o-tolyl, p-tolyl) with the heterocumulenes carbon dioxide, p-tolylisocyanate, and carbon disulfide leads to the i2-carboxylate-, i2-amide-, and i2-thiocarboxylate-containing complexes, respectively, in …
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Synthesis, characterization and reactivity of Group 6 alkoxo nitrosyl complexes
Three new classes of alkoxo nitrosyl complexes of the type Cp*M(NO)(OR)X (Cp* =C5Me5; M = Mo, W; R = alkyl, aryl; X = CI, OR, alkyl), all of which have been fully characterized, are prepared by metathesis reactions. The molecular structures ofCp*W(NO)(OCMe3)2 and Cp*W(NO)(OCH2Ph)2 have been …
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The synthesis and reactivity of low valent technetium nitrosyl complexes
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1994.
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Synthetic models of [FeFe]-hydrogenase: case studies utilizing azadithiolate and nitrosyl coligands
… Four probes the impact of substitution of nitrosyl ligands on diiron(I) dithiolato carbonyls. Treatment of Fe2(S2CnH2n)(CO)5-x(PMe3)x or Fe2(S2CnH2n)(CO)5-y-z(PMe3)y (dppv)z with NOBF4 afforded the nitrosyl complexes [Fe2(S2CnH2n)(CO)4-x(PMe3)x(NO)]BF4 and [Fe2(S2CnH2n)(CO)4-y-z(PMe3)y …
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Synthesis and characteristic chemistry of sixteen-electron group 6 hydrocarbyl-containing nitrosyl complexes
… The relative Lewis acidities of this family of nitrosyl complexes mirrors the thermal stability trend. Reactions of Cp*Mo(NO)C12 with (alky1)2Mg•X(dioxane) [alkyl = CH2CMe3, CH2CMe2Ph,CH2SiMe3] in THE provide previously inaccessible Cp*Mo(NO)(alkyl)C! and Cp*Mo(N0)(alky1)2 complexes in a …
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Measured Electron Spin Relaxation Rates in Frozen Solutions of Azurin, Vitamin-B12r, and Nitrosyl Ferrous Myoglobin
… dimensionality. Rates are also reported for nitrosyl ferrous myoglobin in frozen water solution, which exhibits a dominant one-phonon relaxation process up to 20 K and thus does not reveal spectral dimensionality.
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Measured electron spin relaxation rates in frozen solutions of azurin: Vitamin B12r and nitrosyl ferrous myoglobin
… dimensianality. Rates are also reported for nitrosyl ferrous myoglobin in frozen water solution, which ex hi bits a dominant one-phonon relaxation process at temperatures up to 20 K and thus provides no data from which to determine the spectral dimensionality. The aim of this study was to …
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Roussin's Red Salt Revisited: Synthesis and Characterization of Metal Nitrosyl Dimers and Clusters (Cubanes, Heterobimetallic, Metal Sulfides)
… us to investigate the synthesis of metal nitrosyl dimers in general, later evolving into a study of metal nitrosyl clusters.
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Magneto-optical studies of RirA and cytochrome cd1
… reaction with NO2 − to produce a novel form of nitrosyl-heme d1. The NO derivative of Pseudomonas aeruginosa cd1 was prepared and characterised using variable-temperature variable-field (VTVF) Magnetic Circular Dichroism (MCD) spectroscopy. The novel heme d1 nitrosyl has thus been identified as …
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Synthesis and Maldi-Ms Characterization of New Ruthenium Sulfide Clusters
Finally, ruthenium sulfide phosphine nitrosyl clusters resulting from the reaction of RuCl3(NO)(P(aryl)3)2 and S(TMS)2 were investigated. The distorted heterocubane Ru4 S4(NO)4(PPh3)3 was crystallographically characterized and a related cluster with formula Ru4S3(NO) 4(PPh3)3, possibly …
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The detection of nitric oxide and its reactivity with transition metal thiolate complexes
… this field have yielded unique nickel and cobalt nitrosyl species with atypical electronic and structural parameters. These studies have suggested intermediates for the more biologically relevant iron nitrosyl complexes that have not yet been observed may exist. Furthermore, the NO chemistry of …
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Nitric oxide reactivity of manganese, iron and cobalt tropocoronands and development of fluorescent aminotroponiminates for nitric oxide sensing
… involves the formation of a discrete mononitrosyl [Mn(NO)(TC-5,5)j (3), which has been isolated and characterized formally as (MnmNO-) by infrered spectroscopy, normal coordinate analysis, X-ray crystallography and SQUID susceptometry. Chapter 3. NO Disproportionation Reactivity of Fe …
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Characterizing a structural and functional model of nitric oxide reductase performing NO and O2 reduction in engineered myoglobin
… spectroscopic characterization of the nonheme Fe-nitrosyl species.8 Enrichment of each site with 57Fe allowed for advanced NRVS measurements of all vibrational modes of the 57Fe sites, as well as any 57Fe-nitrosyl species, important for understanding mechanistic intermediates in the NOR reaction.9 …
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Investigation of molybdenum sulfur interactions via single crystal EPR and photoelectron spectroscopy: Implications to molybdoenzymes
… thiolate complexes. These studies show that the nitrosyl complexes (formally Mo(II)) are 0.8 eV more difficult to ionize than the oxo analogues (formally Mo(V)). This counterintuitive result is ascribed to the differing π interactions of the nitrosyl and oxo ligands. The first single crystal EPR …
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Synthesis and Characterization of Carbon Monoxide Producers Bipyridine Flavonolate Palladium(II) and Platinum(II) Complexes: Potential Anti-Cancer Agents
… of the palladium complexes was also studied with nitrosyl hydride, HNO, generated in situ from Angeli’s salt. Deoxymyoglobin was used to trap CO released from the complexes, and the reaction was monitored spectroscopically. The spectra showed that oxygenation reaction did not produce CO in the …
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Insight into the Local Solvent Environment of Biologically Relevant Iron-nitroysl Systems through Two-Dimensional Infrared Spectroscopy
Iron-nitrosyl systems, particularly in the form of heme proteins, with their iron metal active sites play an important role in biological systems. Heme proteins act as storage, transporters, and receptors for nitric oxide (NO), a signaling molecule that is important in immune, nervous, and …
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