Hydrocarbyl complexes structure

Hydrocarbonyl compounds, lanthanide complexes, 4, 4 ( -Hydrocarbyl)bis(zirconocene), preparation, 4, 906 Hydrocarbyl-bridged cyclopentadienyl-amido complexes, with Zr(IV), 4, 864 Hydrocarbyl complexes bis-Cp Ti hydrocarbyls reactions, 4, 551 structure and properties, 4, 551 synthesis, 4, 542 cobalt with rf-ligands, 7, 51 cobalt with rf-ligands, 7, 56 cobalt with ]4-ligands, 7, 59 cobalt with rf-ligands, 7, 71 heteroleptic types, 4, 192 homoleptic types, 4, 192 into magnetic metal nanoparticles via ligand stabilization, 12, 87 via polymer stabilization, 12, 87 into noble metal nanoparticles... 

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(CH3)3)2)3, the first stable U(III) homoleptic complex to have been isolated. A structural study indicated a triganol... 

Metallaboranes mirror the metal hydrocarbyl complexes of organometallic chemistry and offer the promise of a similar rich chemistry.1 Indeed there are a number of strictly isoelectronic borane and hydrocarbon complexes in which a C atom is formally replaced with a B or BH moiety.2 Comparison of the structure and properties of these compound pairs highlights interesting similarities and differences between the organic and inorganic derivatives.3... 

Table 4.5. Structures of a-Hydrocarbyl Complexes of Transition Metals...

Complexes of type (90) represent a new class of zirconium hydrocarbyl derivatives in which a strong metal carbene interaction in a pincer hgand structure is formed. The crystal structure of such complexes shows a short metal carbon link common to two fused four-membered rings which are almost coplanar. 

The allenylidene [M=C=C=CR R ] unit represents a member of the class of carbon-rich unsaturated hydrocarbyl fragments, and it is capable of binding one to four metal centers. In sharp contrast to the rapidly developing chemistry of mononuclear allenylidene complexes, the scarcity of bi- and polynuclear species of this type has hindered the development of an extensive chemistry. Selected examples from the allenylidene literature are cited in this article owing to the close structural analogy with allenyl derivatives. The reader is referred to a review article by Bruce covering the relevant literature of this metallacumulene up to 1989 (la). 

CH2=C=CPh)] (39b). The latter two complexes display very similar structural characteristics. Both complexes contain hydrocarbyl ligands in which i/(CH2-C) exceeds /(C-CR). For instance, in the molybdenum complex these distances are 1.380(2) A and 1.263(4) A, whereas those reported by Wojcicki are 1.39(2) and 1.23(1) A. Such data were interpreted in terms of a large contribution from the 17 -propargyl resonance structure [105(1) and 39(1)), respectively]. However, values of 7ch indi-... 

Bis-phenoxo hydrocarbyl five-coordinated titanium complexes (Scheme 21) have been synthesized and spectroscopically characterized. The molecular structure determined by X-ray diffraction shows the metal to have a distorted trigonal-bipyramidal coordination geometry. Cationic four-coordinate derivatives can be generated by reaction of the methyl derivatives with B(C6F5)3. These cationic species undergo stoichiometric insertions of ethylene and propylene into the Ti-C bond.67... 

A hydrocarbyl elimination approach is used to produce the Zr(rv) dibenzyl complex incorporating a tridentate bis(amido) silylether [iV, 0,(V ] complex 18261 (Equation (13)). The molecular structure of 182 features a distorted tbp geometry with an approximately linear ZrN20 unit and the two amido nitrogen atoms occupying approximately axial positions.One benzyl group is -coordinated. When activated with MAO, complex 182 shows moderate activity for ethylene polymerization. 

Several general review articles [19-41] dealing mostly with the synthesis of new actinide complexes confirm the broad and rapidly expanding scope of this field. Those reviews dealt with the structure, stability, and reactivates of complexes with cyclopentadienyl, dienyls (pentadienyl, cyclohexadienyl, indenyl, phospholyl), cyclooctatetraenyl, arene ligands, hydrocarbyls, and hydrides ligands. 

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