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0-Aryl complexes

All l and Aryl Complexes. CP2MR2 and CP2MRCI, [R = CH(CgH5 CH(Si(CH3)3)2] have been prepared and studied by nmr, and crystal... [Pg.440]

Two examples of steric effects deserve attention. In aryl complexes cis-Pt(PR3)2ArCl, introducing ort/io-substituents into the phenyl group slows down substitution considerably, as these block the position of attack (Figure 3.82). [Pg.238]

Alkene complexes Ammine complexes Aqueous chemistry Arsine complexes Binary compounds Bipyridyl complexes Bond lengths acetylacetonate alkene complexes alkyl and aryl complexes ammine complexes aqua ion... [Pg.388]

Aryl complexes Raubenheimer HG, Kruger GJ, Van Lombard A, Linford L, Viljonen JC (1985) Organometallics 4 275... [Pg.55]

A greatly enhanced chemoselective formation of phenol is observed for alkoxy(alkenyl)carbene complexes compared to alkoxy(aryl)carbene complexes. This behaviour reflects the ease of formation of the rf-vinylketene complex intermediate E starting from alkenylcarbene complexes for aryl complexes this transformation would require dearomatisation. [Pg.130]

B. Ruthenium and Osmium o-Bonded Alkyl and Aryl Complexes. 266... [Pg.223]

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]

Iron(II) alkyl anions fFe(Por)R (R = Me, t-Bu) do not insert CO directly, but do upon one-electron oxidation to Fe(Por)R to give the acyl species Fe(Por)C(0)R, which can in turn be reduced to the iron(II) acyl Fe(Por)C(0)R]. This process competes with homolysis of Fe(Por)R, and the resulting iron(II) porphyrin is stabilized by formation of the carbonyl complex Fe(Por)(CO). Benzyl and phenyl iron(III) complexes do not insert CO, with the former undergoing decomposition and the latter forming a six-coordinate adduct, [Fe(Por)(Ph)(CO) upon reduction to iron(ll). The failure of Fe(Por)Ph to insert CO was attributed to the stronger Fe—C bond in the aryl complexes. The electrochemistry of the iron(lll) acyl complexes Fe(Por)C(0)R was investigated as part of this study, and showed two reversible reductions (to Fe(ll) and Fe(l) acyl complexes, formally) and one irreversible oxidation process."" ... [Pg.258]

The first ruthenium porphyrin alkyls to be reported were prepared from the zerovalent dianion, [Ru(Por)] with iodomethane or iodocthane, giving the ruthe-nium(lV) dialkyl complexes Ru(Por)Me2 or Ru(Por)Et2 (Por = OEP, TTP). Alternatively, the Ru(lV) precursors Ru(Por)X2 react with MeLi or ArLi to produce Ru(Por)Mc2 or Ru(Por)Ar2 (Ar = / -C(,H4X where X = H, Me, OMe, F or Cl) 147-149 The osmium analogues can be prepared by both methods, and Os(Por)R2 where R = Me, Ph and CH2SiMe2 have been reported.Some representative structures are shown in Fig. 5, and the preparation and interconversion of ruthenium porphyrin alkyl and aryl complexes are shown in Scheme 10. [Pg.266]

Substantially more work has been done on reactions of square-planar nickel, palladium, and platinum alkyl and aryl complexes with isocyanides. A communication by Otsuka et al. (108) described the initial work in this area. These workers carried out oxidative addition reactions with Ni(CNBu )4 and with [Pd(CNBu )2] (. In a reaction of the latter compound with methyl iodide the complex, Pd(CNBu )2(CH3)I, stable as a solid but unstable in solution, was obtained. This complex when dissolved in toluene proceeds through an intermediate believed to be dimeric, which then reacts with an additional ligand L (CNBu or PPh3) to give PdL(CNBu )- C(CH3)=NBu I [Eq. (7)]. [Pg.31]

Insertion reactions of platinum(II) alkyl and aryl complexes (144, 153, 171), nucleophilic displacement of isocyanide from [Pt(PRj)2(CNCH3)2] (147) and additions of alcohols and related substances to isocyanides bonded to platinum (8, 9, 25, 33, 34, 100, 117) were discussed earlier. [Pg.80]

The formation of these compounds has been rationalized according to Scheme 6. The reaction of Os (E )-CH=C 11 Ph C1 (C())( P Pr3)2 with n-BuLi involves replacement of the chloride anion by a butyl group to afford the intermediate Os (/i> CH=CHPh ( -Bu)(CO)(P Pr3)2, which by subsequent hydrogen (3 elimination gives OsH ( >CI I=CHPh (CO)( P Pr3)2. The intramolecular reductive elimination of styrene from this compound followed by the C—H activation of the o-aryl proton leads to the hydride-aryl species via the styrene-osmium(O) intermediate Os r 2-CH2=CHPh (CO)(P Pr3)2. In spite of the fact that the hydride-aryl complex is the only species detected in solution, the formation of OsH ( )-CH=CHPh L(CO)(P Pr3)2 and 0s ( )-CH=CHPh (K2-02CH)(C0)(P,Pr3)2 suggests that in solution the hydride-aryl complex is in equilibrium with undetectable concentrations of OsH ( )-CH=CHPh (CO)(P,Pr3)2. This implies that the olehn-osmium(O) intermediate is easily accessible and can give rise to activation reactions at both the olefinic and the ortho phenyl C—H bonds of the... [Pg.9]

Furthermore, ir-arene complexes of transition metals are seldom formed by the direct reaction of benzene with metal complexes. More usually, the syntheses require the formation of (often unstable) metal arene complexes. The analogous formation of w-adsorbed benzene at a metal surface via the initial formation of ff-adsorbcd phenyl, merits more consideration than it has yet been given. It is to be hoped that the recognition and study of structure-sensitive reactions will allow more exact definition of the sites responsible for catalytic activity at metal surfaces. The reactions of benzene, using suitably labeled materials, may prove to be useful probes for such studies. [Pg.154]

Preparation/Formation of Cp2Ti(CO)2 via Titanocene Alkyl and Aryl Complexes... [Pg.324]


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0-Aryl complexes formation

0-Aryl complexes from metal halides

0-Aryl complexes from organoborons

0-Aryl complexes from organolithiums

0-Aryl complexes from organomercurials

A -Arylation complexes

Actinide complexes aryl oxides

Alkenes arylation by palladium complexes

Alkyl and aryl complexes

Alkyl and aryl complexes of chromium

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

Alkyl, aryl, alkene and alkyne complexes

Alkyl/aryl complexes

Amido complexes, amination reactions, aryl halides

Anionic alkyl and aryl chromium complexes

Aryl boryl complexes

Aryl bromides catalysts, cobalt complexes

Aryl carbene complexes

Aryl chlorides palladium complexes

Aryl complexes benzannulation

Aryl complexes chemistry

Aryl complexes cobalt porphyrins

Aryl complexes fluoro

Aryl complexes from alkynes

Aryl complexes metal hydroxides

Aryl complexes metal-(7 bonds

Aryl complexes of chromium

Aryl complexes of platinum

Aryl complexes overview

Aryl complexes polysilanes

Aryl complexes properties

Aryl complexes reduction

Aryl complexes stability

Aryl complexes terminal ligands

Aryl complexes, electron-transfer reactions

Aryl complexes, iodide substitution

Aryl complexes, osmium

Aryl complexes, with

Aryl complexes, with chelating biaryls

Aryl complexes, with phenyl derivatives

Aryl diimine complexes

Aryl ethers, intramolecular complexation

Aryl gold complexes

Aryl halides metal complexes

Aryl halides palladium complexes

Aryl halides vanadium complexes

Aryl halides zirconium complexes

Aryl hydride complexes

Aryl iodides, oxidative addition palladium complexes

Aryl isocyanide complexes

Aryl isocyanides, reaction with palladium complexes

Aryl oxide complexes of lanthanide metals

Aryl phosphites, cobalt complexes

Aryl with nickel complexes

Aryl-Metal Complexes by Electrophilic Attack on Arenes

Aryl-Metal Complexes by Oxidative Addition of Arenes

Aryl-copper complexes, substitution

Aryl-metal complexes

Aryl-metal complexes (rhodium, iridium

Aryl-metal complexes , kinetic stability

Aryl-palladium bimetallic complexes

Aryl-palladium complexes

Aryl-palladium-bromide complex

Arylated Complexes

Arylated Complexes

Arylation catalysts, palladium complexes

Arylation complex

Arylation complex

Arylation palladium complexes

Arylpalladium complexes aryl halide oxidative additions

Benzannulation aryl versus alkenyl complexes

Bis-n-cyclopentadienyl alkyl and aryl complexes

Buchwald—Hartwig arylations complex

Chalcogen aryl complexes

Chromium complexes aryl isocyanides

Cobalt complexes aryl halides

Copper aryl complexes

Dinitrogen bridged complexes aryls

Halides, aryl complexes

Hemoglobin iron-aryl complex

High-pressure synthesis aryl complexes

Homo-coupling reactions of aryl halides to biaryls catalysed by nickel complexes

Homoleptic aryl complexes

Hydride, Alkyl and Aryl Complexes

Hydrocarbon alkyl and aryl complexes

Iridium alkyl and aryl complexes

Iridium complexes alkyls and aryls

Iridium complexes aryls

Lithium complexes alkenyl-aryl reactions

Lithium complexes arylation

Manganese complexes aryls

Nickel alkyl and aryl complexes

Nickel complexes aryl phosphines

Nickel complexes aryl phosphites

Nickel complexes reactions with aryl halides

Nucleophilic aromatic substitution aryl-copper complexes

Olefin complexes oxidative arylation

Oxygen aryl-metal complexes

Palladium complexes aryl halide oxidative addition

Reductive Eliminations to Form -X Bonds from Aryl and Alkylplatinum(IV) Complexes

Rhenium complexes aryl isocyanides

Rhodium complexes arylation

Rhodium complexes with dienes, arylation

Rhodium-aryl complexes

Silver complexes alkyl, alkenyl, aryls

Synthesis of Complexes Containing Terminal Aryl Ligands

Tellurium complexes arylations

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

Vanadium complexes aryls

Ytterbium complexes aryls

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