Showing papers in "Journal of Organometallic Chemistry in 1995"

TL;DR: In this paper, a new approach to the classification of covalent compounds of the transition metals is presented. The classification introduces the concepts of valency number and ligand bond number as alternatives to the formal oxidation state and coordination number, which are used to identify the major characteristic chemical properties of the elements including reactivity trends and reaction mechanisms.

TL;DR: In this paper, the authors describe the beginnings and development of biphasic homogeneous catalysis with water-soluble triphenylphosphine trisulfonate as the ligand.

TL;DR: In this paper, the authors propose a new class of expanded ligands for enantioselective catalysis with transition metal complexes, which consist of a strongly binding chelate core, surrounded by space-filling dendrimer substituents, built up by branching units and optically active groups.

TL;DR: In this article, a series of olefin metathesis catalysts based on the Cl2(PR3)2Ru = CH−CH = CPh2 OE2O2OE2R = CPH2OO2R was attached to a 2% cross-linked polystyrene-divinylbenzene solid support.

TL;DR: In this article, the coordination chemistry of cyclopentadienyl ligands bearing either a dimethylaminoethyl side-chain or a pendant pyridyl group is described.

TL;DR: In this paper, a single crystal X-ray structure of functionallyzed octa-(propylsilsesquioxanes) [(3-XC3H6)8(Si8O12)] has been given.

TL;DR: In this paper, a detailed mechanistic study on the oxidation of alkanes by aqueous [PtCl 6 ] 2− /[PtCL 4 ] 2 − to alcohols plus alkyl chlorides, via proposed (alkyl)Pt II and (alkylfacetyl)-Pt IV intermediates, is presented.

TL;DR: In this paper, a study was made of the polymerization of ethylene involving the use of a series of [η4-4-RC6H4C(NSiMe3)2]2ZrCl2 as precatalysts (R = H (1); CH3 (2)).

TL;DR: A systematic investigation of organorhenium and organoosmium oxides was conducted by Herrmann, Serrano and Bock as discussed by the authors, who solved general problems related to synthesis and reactivity, to structure and bonding, as well as to thermal and photochemical stability.

TL;DR: The Lewis-acidic metal ion Be 2+ forms stable adducts with the carbene 1,3-dimethylimidazolin-2-ylidene (L) as mentioned in this paper.

TL;DR: In this paper, the synthesis and structures of bis(trimethylsilyl)methyls M(CHR2)m (R = SiMe3) of metals and metalloids M are described.

TL;DR: In this paper, the α-pinene-based borane reagents were used for asymmetric synthesis of pure enantiomers, and they achieved the synthesis of 34 R ∗ B < systems in ≥ 99% ee.

TL;DR: Low pressure carbonylation of [MOCl4] or [MO4]− in the presence of BH3/THF and halides X− results in the clean formation of [NEt4]2[MX3(CO)3] containing monovalent rhenium or technetium (M = Re, Tc, X = Cl, Br).

TL;DR: In this article, the authors focus on the stoichiometric reactions involving the metal-silicon bond which result in isolable Si-containing metal complex(es) and the reactions in which the silicon atom leaves the metal complex are not examined.

TL;DR: In this article, a fast ligand exchange reaction between Cp2HfEt2 and AlEt3 under analogous conditions leads to the thermally labile complex Cp′2ZrEt 2 as a precursor for cationic polymerization catalysts [Cp 2 = Cp, rac-Me2Si2Si(Ind)2AlR2][B(C6F5)4] increase in the order R = Me

TL;DR: In this paper, a crystal structure determination showing a nearly undistorted In4 tetrahedron with mean In-In distances of 300.2(1) pm was performed.

TL;DR: In this article, the preparation of several new coinage metal complexes containing bulky, chelating bis(phosphine) ligands is described, and the molecular structures of [AuCl(μ-DiPPE)]n (4), [Cu(μ -Cl)(DHP)]2 (6a), and [au(DHP)(PEt3)]Cl (8) have been determined (diPPE = 1,2-bis(diisopropylphosphino)ethane, DHP = deerhead phosphine, o-

TL;DR: In this article, the crystal structures of the new compounds {M(eta-C(5)R(5))[eta-cPh(NSiMe(3))(2)]]Cl-2} (where R = H, M = Ti, Zr, Hf or R = Me, R = Ti or Zr) have been determined.

TL;DR: The most relevant literature in the field of dinitrogen activation/fixation promoted by early transition metals is critically reviewed in the occasion of the 30th anniversary of its discovery in this paper.

TL;DR: In this paper, the results of a single crystal X-ray analysis reveal the presence of centrosymmetric dimerie structures containing the ylide and HgX2 (X  Cl or I) in both cases.

TL;DR: In this article, a series of Cp′(C5H5)ZrCl12 and Cp2′ZrCL12 precatalysts (Cp′ = C5Me4H, C4Me4P, C5ME5) together with (C5h5)2Zrcl12) were investigated in terms of steric and electronic variations and their catalytic activities in combination with methylalumoxane (MAO) towards the polymerization of ethylene are compared.

TL;DR: The water-soluble phosphine complex of Rh(I), [Rh(PTAH)(PTA)2Cl]Cl(1), has been synthesized from RhCl3 and 1,3,5,triaza-7-phosphaadamantane (PTA), in 96% ethanol as discussed by the authors.

TL;DR: In this article, a group-VI transition metal complex of heterocyclic carbene ligands is obtained in 41-45% yields through reaction of azolium precursor salts with carbonyl metallates.

TL;DR: In this article, the reaction of the lithium salt of the aminodiamide ligand Lie[(SiMe 3) N(CH 2 CH 2 N(SiME 3 ) 2 (Li 2 L) 1 with [TiCl 4 (THF) 2 ] (HF = tetrahydrofuran) forms [ TiCl 2 (L)] 2, from which Ti IV mono and dialkyl complexes are accessible.

TL;DR: In this article, the homogeneous, Rh-catalysed hydrosilylation of but-2-yne with triethoxysilane has been studied, and a catalytic cycle is proposed for this unprecedented hydroilylation reaction.

TL;DR: The ability of the atomic uranium cation U+ to activate a variety of saturated and unsaturated hydrocarbon molecules is investigated in this article, where the mechanism of this metal-mediated cyclotrimerization is enlightened by kinetic measurements, collision-induced dissociation experiments and ion-molecule reactions of the intermediate species.

TL;DR: In this article, multinuclear NMR and Mossbauer spectroscopy have been carried out for d- and triorganotin carboxylates derived from 3-(-2-furanyl)-2-propenoic acid.

TL;DR: The previously unknown 1,1-dichloro-2,3,4,5,5-tetramethyl-1-silacylopenta-2-4-diene (3) was prepared in a three-step synthesis starting from zirconocene dichloride, 2-butyne, and nbutyllithium via bis(cyclopentadienyl)-2.

TL;DR: In this article, the synthesis, crystal structure and propene polymerization behavior of four bridged bis(indenyl)zirconocene dichlorides is presented, showing that the steric bulk at the bridge catalyst is very rigid with respect to the movement of the idenyl rings and the metal centre thus produces highly isotacic polypropene even up to high polymerization temperatures.

TL;DR: A combination of the palladium complex PdCl2(PPh3)2 with MoCl5 shows a high catalytic activity for the intermolecular reductive N-heterocyclization of 2-nitrobenzaldehyde or 2 -nitrophenyl ketones with formamide to give the corresponding quinazoline derivatives in moderate yields as mentioned in this paper.