Transition metal complexes
Transition metal complexes with functionalized silyl substituted cyclopentadienyl and related ligands: synthesis and reactivity
... early transition metal complexes using substituted cyclopentadienyl rings is related to their potential application in various olefin conversion processes and with their wider synthetic ...neous ...
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TítuloDesigning binuclear transition metal complexes: a new example of the versatility of N,N′ bis(2 aminobenzyl) 4,13 diaza 18 crown 6
... polynuclear transition metal complexes are the use of symmetrical 12–14 or unsymmetrical 15 polydentate ligands, macrocyclic receptors, 16–18 or self-assembling ...of metal complexes ...
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Computational study of c-h bond cleavage and c-c bond formation processes catalyzed by transition metal complexes
... two transition state structures depicted in the upper part of Figure ...the metal center, and guesses regarding the stabilities of these complexes are a hard ...the transition state, the O- Si ...
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The coordination chemistry of the neutral tris-2-pyridyl silicon ligand [PhSi(6-Me-2-py)3]
... of transition metal complexes of this type of Si IV tris-pyridyl ...the metal coordinated; a characteristic of related Sn IV tris-pyridyl ...
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TítuloHighly stable complexes of divalent metal ions (Mg2+, Ca2+, Cu2+, Zn2+, Cd2+, and Pb2+) with a dota‐like ligand containing a picolinate pendant
... these complexes implies the occurrence of two helicities: one associated with the layout of the picolinate pendant arms (absolute configuration Δ or Λ), and the second to the four five‐ membered chelate rings ...
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An electron localization function and catastrophe theory analysis on the molecular mechanism of gas phase identity SN2 reactions
... reactant complexes (RC) (see Scheme 1) whereas four different forms (d–g) are considered for the transition structures (TSs) for reactions (1)–(3) and the tran- sition/complex (TC) for reaction (4) as ...
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From mononuclear to dinuclear : magnetic properties of transition metals complexes
... each transition with a gaussian- type function of full-width at half-maximum of 25 ...the metal-centered Fe-3d transitions appear around 420 and 570 nm but they are very weak due to the nearly octahedral ...
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Dinuclear dialkoxo bridged cyclopentadienylsiloxo titanium complexes
... in complexes 1a, 1b and 7 forces this angle to open, also noting an increasing value from 1b and 7, with the planar phenylenedialkoxo bridge, with respect to the ethylenedialkoxo- bridged compound ...
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Heterometallic Cube Type Molecular Nitrides
... on complexes of low-valent transition metals showed that the presence of Ti IV centers in the metalloligand produces an additional stabilization through metal–metal ...single metal ...
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TítuloTriorganoindium reagents in cross coupling reactions: transition metal free reactions with benzopyranyl acetals and tetrahydroisoquinolines and solid stable organometallics
... The importance of N-heterocyclic molecules in general, and THIQs in particular, is paramount, as they are present in countless pharmaceutical drugs, agrochemicals, and bioactive natural products. Therefore, the ...
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ASYMMENTRIC TRANSFER HYDROGENATION IN AQUEOUS SOLUTION CATALYZED BY RHODIUM COMPLEXES WITH C2-SYMMETRIC FLOURENCE-LIGANS CONTAINING CHIRAL (1R, 2R)-CYCLOHEXANE-1, 2-DIAMINE
... the complexes inhibiting any possible tetradentate-coordination, thereby making a more active complex and also enhancing enantioselectivity, especially with bulky ...
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QM 1123 Coordination Complexes pdf
... Each end of this molecule contains a pair of nonbonding electrons that can form a covalent bond to a metal ion. Ethylenediamine is also an example of a chelating ligand. The term chelate comes from a Greek stem ...
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2. STUDIES ON BIOLOGICALLY SIGNIFICANT MERCURY (II), NICKEL (II) AND LEAD (II) BINARY COMPLEXES WITH a- AMINOBUTENOIC ACID IN SOLUTION.
... range, metal ion spots have progressively decreasing mobility, complexation of metal ions should be taking place with anionic species of α-aminobutenoic acid whose concentration increases progressively with ...
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Synthesis and reactivity of new silyl substituted monocyclopentadienyl molybdenum and tungsten complexes
... molybdenum complex 9 was obtained better by oxida- tion of the chloro derivative 3 with PCl 5 . Complexes 9 and 10 were found to be very moisture sensitive, react- ing immediately with traces of water, and must be ...
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Triphenylene-Imidazolium Salts and Their NHC Metal Complexes, Materials with Segregated Multicolumnar Mesophases
... gold complexes, with apparently identical ...gold complexes 8 and 13 is structurally detri- mental compared to the presence of Cl in 7 and 12, but none of them is ...
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Allylsilylcyclopentadienyl Group 4 metal complexes: synthesis, structure and reactivity
... 4 metal alkyls have been reported [1] based on the general agreement that this type of 14-electron system is the active species in a-olefin polymerization reactions ...
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3‐(Pyridin‐2‐yl)imidazo[1,5‐a]pyridine (Pyridylindolizine) as Ligand in Complexes of Transition and Main‐Group Metals
... new complexes has been prepared using main group and transition metal moieties and the Py-indz ligand, and their structures have been fully characterized by spectroscopic methods and X-ray ...and ...
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TítuloTransition metal free cross coupling of indium organometallics with chromene and isochroman acetals mediated by BF3·OEt2
... alkynyl were also studied to demonstrate the versatility of indium reagents in these reactions. In this sense, the reaction of 1with an alkenylindium compound afforded 2-alkenyl chromene 10 in an excellent 92% yield ...
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tert Butylsilylcyclopentadienyl Group 4 metal complexes
... 4 metal com- plexes containing tert -butylsilyl-substituted cyclopenta- dienyl ligands have been successfully isolated and alkylated to give dimethyl, dibenzyl and neophyl ...
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Different methods for the study of interactions of metal complexes with biological molecules
... Addition of GSH to Cp 2 MoCl 2 resulted in an upfield shift of the Cys Hβ resonance of GSH to become coincident with the Glu Hγ resonance, the appearance of a new Gly singlet and two new Cys Hα resonances. The absence of ...
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