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Alkylation complexes

Compounds of the formulas Re(CR]), ReO(CH3)4, Li2[Re2(CH3)g] [60975-25-9], Re02(CH3)3 [56090-011-8], and Re03CH3 [70197-13-6] have been prepared. The first two compounds were obtained from reaction of rhenium hahdes or oxyhahdes and methyllithium the last three were formed from the species by oxidation or reduction reactions. The use of these hydride and alkyl complexes as catalysts is under investigation. [Pg.164]

Hydrocarbyl Complexes. Stable homoleptic and heteroleptic uranium hydrocarbyl complexes have been synthesized. Unlike the thorium analogues, uranium alkyl complexes are generally thermally unstable due to P-hydride elimination or reductive elimination processes. A rare example of a homoleptic uranium complex is U(CH(Si(CH2)3)2)3, the first stable U(I11) homoleptic complex to have been isolated. A stmctural study indicated a triganol... [Pg.335]

Another class of heteroleptic alkyl complexes contains TT-donating ancillary ligands such as RU[N(Si(CH2)3)2]3 (R = 4)- The hydride... [Pg.335]

The stereospecific polymerization of alkenes is catalyzed by coordination compounds such as Ziegler-Natta catalysts, which are heterogeneous TiCl —AI alkyl complexes. Cobalt carbonyl is a catalyst for the polymerization of monoepoxides several rhodium and iridium coordination compounds... [Pg.171]

Stable transition-metal complexes may act as homogenous catalysts in alkene polymerization. The mechanism of so-called Ziegler-Natta catalysis involves a cationic metallocene (typically zirconocene) alkyl complex. An alkene coordinates to the complex and then inserts into the metal alkyl bond. This leads to a new metallocei e in which the polymer is extended by two carbons, i.e. [Pg.251]

A simplified mechanism for the hydroformylation reaction using the rhodium complex starts by the addition of the olefin to the catalyst (A) to form complex (B). The latter rearranges, probably through a four-centered intermediate, to the alkyl complex (C). A carbon monoxide insertion gives the square-planar complex (D). Successive H2 and CO addition produces the original catalyst and the product ... [Pg.165]

The enantiomerically pure chloromethyl complexes (-)-(/ )-9 and ( + )-(S)-9 (shown below as 10) can be converted to iron-alkyl complexes by treatment with sodium borohydride, Grignard reagents, or alkyllithium species, with no loss of enantiomeric purity16,17 (see also Houben-Weyl, Vol. 13/9 a, p 193). [Pg.522]

Silylene complexes are not only stable with donor substituents but also with simple alkyl residues at silicon. These alkyl complexes still have a sufficient thermodynamic stability, but otherwise are reactive enough to allow a rich and diverse chemistry. Particularly the chlorocompounds 7 and 11 are valuable starting materials for further functionalization reactions the details of these reactions will be discussed in the forthcoming sections. The data for the known compounds are summarized in Table 1. [Pg.7]

A review article entitled "Bulky amido ligands in rare-earth chemistry Syntheses, structures, and catalysis" has been published by Roesky. Benzamidinate ligands are briefly mentioned in this contexD The use of bulky benzamidinate ligands in organolanthanide chemistry was also briefly mentioned in a review article by Okuda et al. devoted to "Cationic alkyl complexes of the rare-earth metals S mthesis, structure, and reactivity." Particularly mentioned in this article are reactions of neutral bis(alkyl) lanthanide benzamidinates with [NMe2HPh][BPh4] which result in the formation of thermally robust ion pairs (Scheme 55). ... [Pg.228]

The synthesis, structures, and reactivity of neutral and cationic mono- and bis(guanidinato)zirconium(rV) complexes have been studied in detail. Either salt-metathesis using preformed lithium guanidinates or carbodiimide insertion of zirconium amides can be employed. Typical examples for these two main synthetic routes are illustrated in Schemes 73 and 74. Various cr-alkyl complexes and cationic species derived from these precursors have been prepared and structurally characterized. [Pg.243]

The guanidinate-supported titanium imido complex [Me2NC(NPr02l2Ti = NAr (Ar = 2,6-Me2C6H3) (cf. Section IILB.2) was reported to be an effective catalyst for the hydroamination of alkynes. The catalytic activity of bulky amidinato bis(alkyl) complexes of scandium and yttrium (cf. Section III.B.l) in the intramolecular hydroamination/cyclization of 2,2-dimethyl-4-pentenylamine has been investigated and compared to the activity of the corresponding cationic mono(alkyl) derivatives. [Pg.336]

A). The alkyl complexes react rapidly with CO and isocyanides, but pure products could not be isolated. Fast reactions of CO2 and acetone with Sc(OEP)Me gave the well-characterized acetate and /-butoxide products. Sc(OEP)OAc and Sc(0EP)0-r-Bu, respectively, formed by insertion into the Sc—C bond. ... [Pg.235]

H NMR spectroscopy studies of iron(IIl) a-alkyl and o-aryl porphyrins have been very important in elucidating spin states. Alkyl and most aryl complexes with simple porphyrin ligands (OEP, TPP, or TTP) are low spin, S — I /2 species. NMR spectra for the tetraarylporphyrin derivatives show upheld resonances for the porphyrin pyrrole protons (ca. — 18 to —35 ppm), and alternating upfield and downfield hyperfine shifts for the axial alkyl or aryl resonances. For -alkyl complexes, the a-protons show dramatic downfield shifts (to ca. 600 ppm), upfield shifts for the /3-protons (—25 to — 160 ppm) and downfield shifts for the y-protons (12 ppm). The cr-protons of alkyliron porphyrins are not usually detected as a result of their large downfield shift and broad resonance. These protons were first detected by deuterium NMR in the dcuterated complexes Fe(TPP)CD3 (532 ppm) and Fe(TPP)CD2CDi (562, -117 ppm). ... [Pg.248]

The reduced alkyl complexes are reoxidized by O2 to the iron(lll) alkyls. The corresponding diamagnetic phthalocyanine iron(ll) alkyl complexes, rFe(Pc)R), were prepared by two-electron reduction of Fe(Pc) by LiAIFl4 to give [Fe(Pc) (actually the Fe(I) phthalocyanine radical anion) followed by reaction with Mel, Etl or i-PrBr. The methyl compound, [Fe(Pc)CHi] was characterized by X-ray crystallography. ... [Pg.249]

Alkyliron(lll) porphyrin complexes are air. sensitive, and when exposed to oxygen under ambient conditions the products are the very stable iron(IIl) /t-oxo dimers, [Fe(Por)]20. A more careful investigation revealed that the reaction of the alkyl complexes with oxygen proceeds via insertion of O2 into the Fe—C bond. " When a solution of Fe(Por)R (R = Me, Et, i-Pr) is exposed to O2 at —70 C, the characteristic H NMR spectrum of the low spin iron alkyl complex disappears and is replaced by a new, high spin species. The same species can be generated from the reaction of an alkyl hydroperoxide with Fe(Por)OH, and is formulated as... [Pg.256]

One-electron reduction of the iron(lll) alkyl complexes forms the diamagnetic iron(ll) alkyl anions [Fe(Por)R. The iron(ll) anions do not react with oxygen directly, but are first oxidized by O2 to the corresponding alkyliron(III) complexes, Fe(Por)R, which then insert O2 as described above. [Pg.257]

In terms of relative Co—C bond energies, those in the trihalomethyl complexes Co(OEP)CX3 are observed to be qualitatively weaker than in Co-alkyl porphyrin complexes. The high thermal stability of the cobalt porphyrin stannyl complexes was interpreted as an indication that, surprisingly, the Co—Sn bond is stronger than the Co—C bond in Co(Por)(alkyl) complexes. " ... [Pg.285]

The stoichiometric insertion of terminal alkenes into the Cu-B bond of the (NHC)Cu-B(cat) complex, and the isolation and full characterisation of the p-boryl-alkyl-copper (I) complex has been reported. The alkyl complex decomposes at higher temperatures by P-H elimination to vinylboronate ester [67]. These data provide experimental evidence for a mechanism involving insertion of alkenes into Cu-boryl bonds, and establish a versatile and inexpensive catalytic system of wide scope for the diboration of alkenes and alkynes based on copper. [Pg.40]

The alkyl complexes [TpRR ]MgR are characterized by well-resolved... [Pg.315]


See other pages where Alkylation complexes is mentioned: [Pg.41]    [Pg.478]    [Pg.81]    [Pg.206]    [Pg.318]    [Pg.329]    [Pg.230]    [Pg.233]    [Pg.235]    [Pg.241]    [Pg.241]    [Pg.244]    [Pg.246]    [Pg.263]    [Pg.282]    [Pg.282]    [Pg.283]    [Pg.287]    [Pg.135]    [Pg.139]    [Pg.261]    [Pg.30]    [Pg.166]    [Pg.204]    [Pg.110]    [Pg.259]    [Pg.310]    [Pg.311]    [Pg.314]    [Pg.314]    [Pg.315]   
See also in sourсe #XX -- [ Pg.193 ]




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Acyl enzyme alkylation complex

Agostic alkyl complex

Alkyl and Related Complexes

Alkyl and aryl complexes

Alkyl and aryl complexes of chromium

Alkyl carbonyl complexes, structures

Alkyl cation-dihydrogen complexes

Alkyl cobalamin complexes

Alkyl complexes

Alkyl complexes

Alkyl complexes alkyne insertions

Alkyl complexes carbon monoxide insertions

Alkyl complexes chemistry

Alkyl complexes cobalt porphyrins

Alkyl complexes electrophilic attack

Alkyl complexes features

Alkyl complexes iridium porphyrins

Alkyl complexes metal hydroxides

Alkyl complexes osmium porphyrins

Alkyl complexes rhodium porphyrins

Alkyl complexes ruthenium porphyrins

Alkyl complexes selected reactions

Alkyl complexes small molecule insertion

Alkyl complexes synthesis

Alkyl complexes thermodynamic properties

Alkyl complexes, electron-transfer reactions

Alkyl complexes, hydride abstraction reactions

Alkyl complexes, osmium

Alkyl fluoride-SbF5 complexes

Alkyl from carbene complexes

Alkyl gold complexes

Alkyl halides palladium complexes

Alkyl halides platinum complexes

Alkyl halides vanadium complexes

Alkyl hydride complexes

Alkyl hydride complexes isotopic scrambling

Alkyl nitrile complex

Alkyl olefin complexes, structures

Alkyl or Aryl Bis(tertiary phosphine) Hydroxo Complexes of Platinum(II)

Alkyl peroxo-complex

Alkyl phosphites, transition metal complexes

Alkyl rare-earth metal complexes

Alkyl reaction with nucleophilic complexes

Alkyl transfer reactions 3-Allyl complexes

Alkyl zinc complexes, synthesis

Alkyl, aryl, alkene and alkyne complexes

Alkyl-allyl complex

Alkyl-diene complex

Alkyl-lithium complexes

Alkyl-ruthenium complexes

Alkyl-tungsten complexes

Alkyl-zirconium complexes

Alkyl/aryl complexes

Alkylated BDHC complexes

Alkylated Poly amine Complexes of Palladium(II)

Alkylated Polyamine Complexes of Palladium(II)

Alkylating agents platinum complexes

Alkylation 1,3-diketone metal complexes

Alkylation acetylacetone metal complexes

Alkylation catalysts, rhodium complexes

Alkylation complex catalysis

Alkylation complexes with metals

Alkylation of Allyl Fp Complexes and Formal Cycloadditions

Alkylation palladium complexes

Alkylation triflate complex

Alkylation with organopalladium complexes

Alkylations complexes

Alkylations complexes

Alkylative amination alkyltitanium complexes

Allyl rhodium complexes, alkylation

Allyl rhodium complexes, alkylation intermediate

Allylic alkylations complexes

Anionic alkyl and aryl chromium complexes

Anionic alkyl complexes

Arene osmium alkyl complexes

Attack of Main Group Electrophiles on Alkyl Complexes Possessing d-Electrons

Bis-n-cyclopentadienyl alkyl and aryl complexes

Bonding alkyl complexes

Borane complexes metal-alkyl

Carbene complexes alkylation

Carbene complexes alkylations

Carbene complexes, alkyl aminoalkylation

Carbene complexes, alkyl pentacarbonylalkylation

Carbene complexes, alkyl pentacarbonylalkylation anions

Carbene complexes, alkyl pentacarbonylalkylation reaction with carbonyl compounds

Carbene complexes, tetracarbonyl phosphine alkylation

Carbon disulfide complex, alkylation

Carbon monoxide insertions metal-alkyl complexes

Carboxylate complexes alkylation

Catalase-alkyl hydroperoxide complexes

Cationic alkyl rare-earth metal complexes

Chalcogen alkyl complexes

Chiral metal complexes alkylation

Chromium complexes alkyl

Chromium complexes alkyl isocyanides

Cobalt alkyl complex

Cobalt complexes alkyl halides

Cobalt complexes alkylation

Complex alkyl-metal anions

Complex reducing agents alkyl halides

Complexation in 1-Alkyl-4-vinylpyridinium Ions and Related Polymers

Complexed aluminium alkyls

Copper alkyl complexes

Cr-bonded anionic carbon complexes, alkyl

Dicarbonyl iron-alkyl complex

Dinitrogen complexes alkylation

D° metal-alkyl complex

Electrophiles alkyl thiolate complex

Elimination from metal alkyl complexes

Formyl complexes alkylation

From Alkyl Complexes by a-Abstraction

Hafnium complexes alkyl

Hafnium complexes alkyl alkoxy

Half-sandwich alkyl complexes

Halides, alkyl, base induced complexes

Homoleptic alkyl complexes

Hydride, Alkyl and Aryl Complexes

Hydrido-alkyl complex

Hydrocarbon alkyl and aryl complexes

Immobilized alkyl complex

Intramolecular alkyl ligand transfer in dinuclear complexes

Iridium alkyl and aryl complexes

Iridium complexes alkyl

Iridium complexes alkyls and aryls

Iridium, alkyl halide complex

Iron acyl complexes alkylation

Iron alkyl complex

Iron complexes alkyl cleavage

Iron complexes alkyl cyanides

Iron complexes alkylated clusters

Iron complexes alkylation--protonation

Iron complexes, with alkyl

Iron tricarbonyl complexes alkylation

Lithium complexes alkylation

Magnesium alkyl complex

Magnesium alkyl complex catalyst

Manganese alkyl complex

Manganese complexes alkyl phosphines

Mercury alkyl halides, 66 complexes

Mercury alkyls complexes

Metal alkyls alkylcobalt complexes

Metal-alkyl complexes

Metal-alkyl complexes Agostic

Metal-alkyl complexes Bridging

Metal-alkyl complexes Electrophilic abstraction

Metal-alkyl complexes Metallacycles

Metal-alkyl complexes Preparation

Metal-alkyl complexes Stability

Metal-alkyl halide complexes

Methyllithium, alkylation of iridium complexes

Mixed-alkylated complexes

Molybdenum complexes alkyl

Molybdenum complexes alkyl alkoxy

Molybdenum complexes alkyl peroxides

Molybdenum complexes alkylation

Nickel alkyl and aryl complexes

Nickel complexes Grignard reagent alkylation

Nickel complexes alkyl

Nickel complexes alkyl phosphines

Nickel complexes alkyl phosphites

Nickel complexes alkylation

Nickel complexes alkylation-protonation

Niobium complexes, hexahalogeno salts and compounds with alkyl

O-Alkyl complexes

Organocobalt alkyl complexes

Other Metal-alkyl Complexes in the Environment

Palladium alkyl complex

Palladium complexes alkyl, 3-hydrogen elimination

Palladium complexes catalyst, Grignard reagent alkylation

Palladium-alkyl-carbon monoxide complexes

Permethylscandocene-alkyl complex

Photochemistry of Alkyl Complexes

Photoisomerization of Alkyl Groups in Cobaloxime Complexes

Platinum complex alkylating

Platinum complexes alkyl

Platinum complexes alkyl transfer

Platinum complexes alkylation

Racemizations of Alkyl Groups in Cobaloxime Complex Crystals

Re-alkyl complex

Reactions diamagnetic metal alkyl complexes with

Rearrangement, 1,2-alkyl complexes

Rhenium complexes alkyl derivatives

Rhenium complexes alkyl isocyanides

Rhenium complexes alkylation

Rhodium alkyl complex

Ruthenium complexes alkylated clusters

Ruthenium complexes cyclopentadienyl alkyls

Samarium complexes alkyl compounds

Scandium complexes alkyl compounds

Selected Reactions of Metal-Alkyl Complexes

Silver complexes alkyl, alkenyl, aryls

Sodium alkyl thiolates, reaction with halogen substituted metal complexes

Sulfoxide complexes alkylation

Synthesis of Alkyl Complexes by Other Methods

Synthesis of Alkyl Complexes by Transmetallation

Synthesis of Metal-Alkyl Complexes

Tantalum complexes alkyl

Tantalum complexes alkyl alkoxy

Tantalum complexes, hexahalogeno salts and compounds with alkyl

Tellurium complexes alkylations

Thallium bis borate, complex with aluminum and gallium alkyls

The properties of perfluoro-alkyl and -aryl transition metal complexes

Titanium complexes alkyl

Titanium complexes alkyl alkoxy

Titanium complexes alkyl peroxides

Titanium complexes with alkyl ligands

Titanium complexes, electron-transfer reactions alkyls

Titanium complexes, reaction with carbon alkyls

Transition Metal Alkyl and Alkenyl Complexes

Transition metal complexes alkyl

Transition metal complexes alkylation

Transition metal complexes, alkylations

Transition metals, alkyl halide complexes

Triflates, alkyl carbonyl phosphine carbene complexes

Trifluorophosphine complexes alkyls

Tungsten complexes alkyl alkoxy

Tungsten complexes alkylation

Tungsten complexes with alkyls

Tungsten complexes, alkyl carbene

Uranium complexes, hexahalogeno salts and compounds with alkyl

Vanadium complexes alkyl peroxides

Vanadium complexes alkyl transfer reactions

Ytterbium complexes alkyls

Yttrium complexes alkyl compounds

Yttrium complexes alkyls

Zirconium complexes with alkyl ligands

Zirconium complexes with amido alkyl ligands

Zirconium complexes, hexahalogeno salts and compounds with alkyl nitriles

Zirconium-aluminum alkyl complexes

Zirconocene-alkyl complexes

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