The Synthesis and Structure

Bismuth(V) oxide and bismuthates are even less well established though a recent important development has been the synthesis and structural characterization of LisBiOs, prepared by heating an intimate mixture of Li20 and Q -Bi203 at 650° for 24 h in dry O2. The structure is of the defect rock-salt type with an ordering of... 

Chem. 23, 770-4 (1994) this also describes the synthesis and structure of [K(crypt)] 2[Sb4] which features the square planar [864] anion with Sb-Sb 275 pm. 

Apart from manifold structures, carbons can have various shapes, forms, and textures, including powders with different particle size distributions, foams, whiskers, foils, felts, papers, fibers [76, 77], spherical particles [76] such as mesocarbon microbeads (MCMB s) [78], etc. Comprehensive overviews are given, for example in [67, 71, 72], Further information on the synthesis and structures of carbonaceous materials can be found in [67, 70, 72, 75, 79]. Details of the surface composition and surface chemistry of carbons are reviewed in Chapter II, Sec. 8, and in Chapter III, Sec. 6, of this handbook. Some aspects of surface chemistry of lithiated carbons will also be discussed in Sec. 5.2.2.3. 

Especially notable is also the synthesis and structural characterization of an unusual antimony(III) guanidinate. 1,2,3-Tiiisopropylguanidine, Pr N = C(NHPr )2,was found to react with 1 molar equivalent of Sb(NMe2)3 in toluene under formation of a yellow solution, from which the novel compound Sb[Pr NC(NPr )2][Pr NHC(NPr )2] could be isolated in 10% yield as highly air-sensitive crystals. In the solid state, the complex adopts a heavily distorted trigonal-bipyramidal molecular structure in which the Sb is chelated by a [CfNPr ls] dianion and a [Pr NHC(NPr )2] monoanion (Figure 16). Supramolecular... 

Sn2Sl2, was said (385) to exist in an a and a )8 form. The crystal structures of both forms have been elucidated (119, 239, 240, 388). Apart from questions that still remain concerning the true relationship of a-and )8-Sn2Sl2, a publication by Fenner (121) on the synthesis and structure of a new ternary phase, Sn4SIe, contradicts both of the phase diagrams already mentioned. 

AT-Heteroaryl ring systems are well-known as bridging functions between transition metal centers [12, 40, 41]. The pyridyl substituent is one of the representative examples of such systems that has been a widely used ligand in transition metal coordination chemistry [42]. However, the interest in group 13 metal chemistry of these ligands is of recent interest. Stalke et al. [43] have reported the synthesis and structure of the aluminum adduct Me3Al(/r-Py)PPy2 10. 

The Synthesis and Structural Properties of Aluminum Oxide, Hydroxide and... 

For the synthesis and structural studies of /9-peptides, Seebach and coworkers have prepared acycHc /9-amino acids with different substitution pattern (including /9A, y 3,3, 3,3 -amino acids) and with the side chains of natural... 

Osteogenesis Imperfecta (eg, MIM 166200) Due to a variety of mutations In the COL /Aland COL 1A2 genes affecting the synthesis and structure of type 1 collagen. 

The chemistry of the heavy carbenium ion analogs has been the subject of several preceding reviews, of which the latest one by Miiller P is the most comprehensive. In this section we will deal briefly with the most essential achievements made in the 1990s, and will emphasize the latest progress in the field, particularly concerning the synthesis and structural studies of the stable noncoordinated ( free ) cations of the type RR R"E+. 

Linton DJ, Wheatley AEH (2003) The Synthesis and Structural Properties of Aluminium Oxide, Hydroxide and Organooxide Compounds 105 67-139 Lo KK-W (2007) Luminescent Transition Metal Complexes as Biological Labels and Probes. 123 205-245... 

The synthesis and structure of square-planar [IrCl(DMSO)3] is reported.636 All the DMSO ligands are S-bonded to the Ir center with a short Ir—S bond (2.1957(9) A), trans to Ir—Cl. Addition of H20 to [IrCl(DMSO)3] yields complex (393), as characterized by X-ray crystallography. 

The synthesis and structural characterization of luminescent di- and tri-nuclear organopalla-dium complexes with rigid conjugated alkynyl-aryl bridges and preliminary experiments on the formation of the first generation metallodendrimer using the trinuclear complex as the backbone were reported.102... 

In 1989 we reported on the synthesis and structure of the first l,3-diphospha-2-sila-allylic anion 3a [4], mentioning its value as a precursor for phosphino-silaphosphenes. In analogy to 3a we obtained the anions 3b-f [5] by treatment of 4 equivalents of the lithium phosphide 1 with the adequately substituted RSiC, of which 3b and 3c were investigated by X-ray analyses. The very short P-Si bond lengths (2.11-2.13 A) of 3a-c and the almost planar arrangement of Pl-Sil-P2-Lil indicate the cr-character of the Lithium P-Si-P allyl complex. 

Selenation of the 1,4-dicarbonyl precursor 89 using the reagent (Me2Al)2Se gave the benzo[c]selenophene derivative 90 in good yield <06TL2887>. The synthesis and structural studies of 4,7-dimethoxybenzo[c]tellurophene have also been reported <06AG(E)5666>. 

The synthesis and structures of 6-amino-l,2,4-triazolo[3,4-/][l,2,4]triazin-8(7i/)-one derivatives <06MI169 06MI444> and of dihydrotetrazolo[5,l-c][l,2,4]triazines have been described <06H1595>. 

This section surveys the rapid development which has occurred in the synthesis and structural analyses of mixed metal complexes in the 12 years since the publication of COMC (1995). The limited information which was available then on ate complexes has expanded into a more sophisticated understanding of how different metals gathered in a single complex influence the adopted structure and observed reactivity. 

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