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Showing 1 to 20 of 25 for “"phosphine complexes"”.
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Synthesis, Structure, Spectroscopy, and Reactivity of Azapentadienyl-Ruthenium-Phosphine Complexes
… synthesis of ¬bis-azapentadienyl-ruthenium-phosphine complexes. The synthetic approach involves the treatment of Cl2Ru(PPh3)3 with potassium tert-butylazapentadienide reagent. The reactivity of this parent compound with other 2e- donor ligands is investigated. These resultant complexes' …
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Synthesis and Characterization of Bis-Phosphine Complexes with Transition Metals
… as Lewis base donor atoms to form coordination complexes with the metal ions of interest. These extractants often make use of the chelate effect and/or the macrocyclic effect in order to form stable complexes. Some of the best known types of chelate extractants include polyaminopolycarboxylic …
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Synthesis, characterization, and reactivity of low valent technetium phosphine complexes
… (dppm), and with diphenyl-2-pyridyl phosphine (Ph2Ppy), has been investigated. The neutral Tc(II) complex, TcCl2(dppm)2, has been isolated from the reaction of (NH4)[TcO4] with excess dppm in refluxing EtOH/HCl. Chemical oxidation with ferricinium hexafluorophosphate results in …
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Physical Studies of Iron(ii) Spin Equilibrium Complexes Containing Hexadentate Ligands and Thermodynamic and Kinetic Studies of Rhodium(i) Phosphine Complexes and Mixed Ligand Rhodium(iii) Dihydrides
Made available in DSpace on 2014-12-13T20:09:52Z (GMT). No. of bitstreams: 1 7624106.pdf: 3625386 bytes, checksum: 4a1fd1fad11c3c2153940ac0d416a04a (MD5) Previous issue date: 1976
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Palladium and manganese catalysis in C-H activation
… application of a number of carbonyl manganese phosphine complexes. The vast majority of C-H activation protocols involve the use of precious 4d or 5d transition metal catalysts. However, many of these metals are now classed as ‘finite raw materials’. Clearly, there is an urgent need to …
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Photophysical studies of silver(I), platinum(II), palladium(II), and nickel(II) complexes and their use in electronic devices.
… (a) divalent group 10 metals and (b) silver(I)-phosphine complexes. The scope of the work involved the delineation of the electronic structure of these complexes in different environments and their use in electronic devices. The first topic is a look at the luminescence of tetrahedral …
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Improved Synthesis, Separation, Transition Metal Coordination and Reaction Chemistry of a New Binucleating Tetraphosphine Ligand
… reactions catalyzed by late transition metal complexes. Previously reported results are summarized here. Mechanistic aspects of alkene hydration catalyzed by late transition metal complexes are also explained. The second part of Chapter 1 focuses on motivation for using bimetallic nickel …
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Studies in iridium and manganese catalysis in C-H activation and reductive transformations
… the synthesis of various carbonyl manganese phosphine complexes and their applications in C–H activation. Chapter 2, Part I details the synthesis and characterisation of three carbonyl manganese phosphine complexes through spectroscopic methods and investigates their role in C–H activation …
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The synthesis, characterization and properties of new organometallic polymers
… the block copolymers. Two ruthenium and platinum complexes containing bulky dendritic phosphine ligands, cis-Pt(RDP)₂Cl₂ and trans,trans,trans-RuCl₂(CO)₂(RDP)₂, have been prepared. These new phosphine complexes have been characterized by IR, ¹H, ¹³C and ³¹P NMR, as well as elemental analysis. We …
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Synthesis, Structure and Spectroscopy of Heteropentadienyl-Cobalt Complexes
… The study of heteropentadienyl-transition metal complexes has been an active area of research in the last decade, and has recently received significant attention in the chemical literature. These molecules can now be synthesized by generalized methods, allowing their unique reactivity to be the …
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Photochemical reductive elimination of halogen from transition metal complexes
… on the synthesis and study of transition metal complexes that undergo halogen elimination when irradiated with UV and visible light. This chemistry is relevant for solar energy storage schemes in which simple substrates such as HX (X = Cl, Br, OH) can be split to H2 and X2 in thermodynamically …
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Gold(I) and Platinum(II)-Catalyzed Hydrofunctionalization of Allenes and Alkenes with Carbon and Nitrogen Nucleophiles
… various indoles.</p> </p><p><p>Platinum(II) bis(phosphine) complexes catalyzed the intermolecular hydroamination of monosubstituted allenes with secondary alkylamines in good yield with selective formation of (<italic>E</italic>)-allylic amines. The scope of the protocol included aryl and alkyl …
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Use of water-soluble phosphine ligands in heterogeneous hydroformylation catalysis : application to long-chain 1-alkenes
The two-phase rhodium-tri(m-sulfonatophenyl)phosphine (Rh-TPPTS) system for the hydroformylation of 1-octene, 1-decene, and 1-dodecene to the corresponding aldehydes, has been investigated. Due to the two distinct phases - the catalytic species in the aqueous phase and the products and reactants in …
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Dinitrogen complexes of titanium and vanadium stabilized by phosphine ligands
… is to investigate the preparation of dinitrogen complexes of titanium and vanadium from phosphine-based starting materials. The reactions of TiCl₄, TiCl₃(THF)₃, or VCl₂(TMEDA)₂ with LiN(SiMe₂CH₂PR₂)₂ (R = isopropyl or methyl) yielded the new phosphine complexes TiCl₃[N(SiMe₂CH₂PPri₂)₂] (1), …
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Utilisation of halophosphine and aminophosphine ligands in organoruthenium chemistry
… the syntheses and reactivity of areneruthenium complexescontaining halophosphine and aminophosphine ligands. Methylcyclopentadienylrutheniumchemistry is also developed together with corresponding tertbutylcyclopentadienylrutheniumchemistry. All the new compounds prepared arepseudo-octahedral …
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Bond Formation Reactions to Phosphorus Using an Electrophilic Phosphinidene Complex
Electrophilic phosphinidene complexes play a central role in organophosphorus chemistry. The chemistry of transient phosphinidene complexes has been well studied, but stable, cationic phosphinidene complexes are not as well understood. Therefore the reactivity of a cationic phosphinidene complex …
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Tripodal Inorganic 2-Pyridyl-phosphine Ligands and Unsymmetrical Analogues: Towards New Applications in Catalysis
… extensively in homogeneous catalysis, 2-pyridyl-phosphines have been largely overlooked in this field. However, such ligands offer great potential for catalytic applications through the combination of two ligand sites with different donating and accepting properties. In Chapter 1 previous studies …
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The properties of zerovalent nickel-carbonyl-diphosine complexes and their application to the synthesis of heterobimetallic systems
… of properties of zerovalent Ni-CO-di phosphine complexes and their application to the synthesis of heterobimetallic systems. Two Ni(O)-carbonyl-diphosphine complexes [Ni(CO)(dppe-PP')(dppe-P)J and [ Ni(CO)2(dppm-P)2J have been prepared. [Ni(CO)(dppe-PP')(dppe-P)J has been prepared by …
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Investigations into alkene hydration and alkene oxidation catalysis
Bimetallic Ni complexes Ni21M and Ni21R and monometallic transition metal complexes were investigated as possible alkene hydration catalysts under a multitude of different reaction conditions. All attempts at performing this catalytic reaction failed to give any alcohol products. Catalytic …
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