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Tetrakis structure

The most probable reason for this behavior is steric hindrance to attack in the tetrakis structure. [Pg.82]

Chemical Name Tetrakis(hydroxymagnesium)decahydroxydialuminate dihydrate Common Name Magnesium aluminate hydrate monalium hydrate Structural Formula [Mg(DH)]4 [(HD)4AI(DH)(HO)AI(OH)4]-2H2D Chemical Abstracts Registry No. 1317-26-6... [Pg.893]

Experience in PTC with cationic catalysts showed that, in general, the most suitable compounds have symmetrical structures, are lipophilic, and have the active cationic charge centrally located or sterically shielded by substituents. For anionic catalysis sodium tetraphenylborate fulfills these conditions, but it is not stable under acidic conditions. However, certain derivatives of this compound, namely sodium tetra-kis[3,5-bis(trifluoromethyl)phenyl]borate (TFPB, 12.162) and sodium tetrakis[3,5-bis-(l,l,l,3,3,3-hexafluoro-2-methoxy-2-propyl)phenyl]borate (HFPB) are sufficiently stable to be used as PTC catalysts for azo coupling reactions (Iwamoto et al., 1983b 1984 Nishida et al., 1984). These fluorinated tetraphenylborates were found to catalyze strongly azo coupling reactions, some of which were carried out with the corresponding diazotization in situ. [Pg.378]

Calcium, tetrakis(methanol)dinitrato-structure, 1, 89 Calcium alkoxides synthesis, 2, 336... [Pg.97]

Chromium, tetraaquadichloro-chloride dihydrate hydrate isomerism, 1, 183 Chromium, tetrabromo-solvated, 3, 758 synthesis, 3, 763 Chromium, tetrachloro-antiferromagnetic, 3, 761 ferromagnetic magnetic properties, 3,7559 optical properties, 3,759 structure, 3,759 solvated, 3. 758 synthesis. 3, 759 Chromium, tetrachlorooxy-tetraphenylarsenate stereochemistry, 1,44 Chromium, tetrahalo-, 3,889 Chromium, tetrakis(dioxygen)-stereochemistry, 1,94 Chromium, triamminediperoxy-structure. 1, 78 Chromium, tricyanodiperoxy-structure, 1, 78 Chromium, trifluoro-electronic spectra, 3, 757 magnetic properties, 3, 757 structures, 3, 757 synthesis, 3, 756 Chromium, trihalo-clcctronic spectra, 3, 764 magnetic properties, 3, 764 structure, 3, 764 synthesis, 3, 764 Chromium, tris(acetylacetone)-structure. 1, 65 Chromium, tris(bipyridyl)-... [Pg.101]

Ethane, (K)-l-cyclohexyl-L2-bis(diphenylphosphino)-rhodium complexes asymmetric hydrogenation, 6,253 Ethane, tetracyano-metal complexes, 2,263 Ethane, tetrakis(aminomethyl)-metal complexes, 2, 56 Ethane, tris[l, 1, l-(trisaminomethyl)]-complexes structure, 1,26... [Pg.127]

Nickel, methyltetrakis(trimethylphosphine)-tetraphenylborate stereochemistry, 1,44 Nickel, pentacyano-isomerism, 1, 206 structure, 1, 40 Nickel, tetracarbonyl-cxchangc reactions, 1,288 Nickel, tetracyano-, 5,67 Nickel, tetrahalo-, 5, 186 Nickel, tetrakis(dinitrogen)-syn thesis... [Pg.172]

Niobium, tetrakis(2,2,6,6-tetramethyl-3,5-heptanedione)-stereochemistry, 1, 94 structure, 1, 93... [Pg.177]

Scandium, tetrakis(tropolone)-stereochemistry, 1,94 Scandium, tris(acetylacetone)-structure, 1. 65, 68 Scandium, tris(tropolonate)-structure, 1,68 Scandium aryloxides spectroscopy, 2, 346 Scandium chloride... [Pg.219]

Thorium, (dimethylformamide)tetrakis(tropolone)-structure, 1, 98 Thorium, hexanitrato-structure, 1,101 Thorium, pentacarbonato-stereochcmistry, I, 99 Thorium, tetrachlorobis(octamethylpyro-phosphoramide)-structure, 1, 89... [Pg.235]

Thorium, tetrakis(4,4,4-trifluoro-l-thienyl-l, 3-butanedione)(trioctylphosphine oxide)-structure, 1, 98 Thorium, triaquatetranitrato-structure, 1, 99... [Pg.235]

Tin, nitratodiphenyltris(dimethy) sulfoxide)-structure, 1,77 Tin, nitratotris(triphenyltin)-structure, 1, 47 Tin,tetrakis(acetato)-stereochemistry, 1,94 Tin, tetrakis(diethyldithiocarbamato)-angular parameters, 1, 57 Tin, tetrakis(ethyldithiocarbamato)-angular parameters, 1, 57 Tin, tetranitrato-stereochemistry, 1, 94 Tin, tri-n-butylmethoxy-, 3, 208 Tin alkoxides physical properties, 2, 346 Tin bromide, 3, 194 Tin bromide hydrate, 3,195 Tin carboxylates, 3, 222 mixed valence, 3, 222 Tin chloride, 3, 194 hydroformylation platinum complexes, 6, 263 Tin chloride dihydrate, 3,195 Tin complexes, 3, 183-223 acetyl ace tone... [Pg.235]

Titanium, tetrakis(trimethysilyl)oxy-, 3, 334 Titanium, tetranitrato-stereochemistry, 1,94 Titanium, triaquabis(oxalato)-structure, I, 78 Titanium, tris(acetylacetone)-structurc, 1,65 Titanium alkoxides oligomeric structure, 2,346 synthesis ammonia, 2, 338 Titanium chloride photographic developer, 6,99 Titanium complexes acetylacetone dinuclear, 2, 372 alkyl... [Pg.236]

Uranium, pentakis(dimethyl sulfoxide)dioxy-stereochemistry, I, 74 Uranium, pentakis(urea)dioxy-stereochemistry, 1,74 Uranium, tetrakis(bipyridyl)-stereochemistry, I, 94 structure, 1, 24... [Pg.241]

Uranium. tetrakis(phenoxy)bis[ethylenebis-(dimethylphosphine)]-structure, 1,89... [Pg.241]

Zirconium, tetrakis(acetylacetonate)-stereochemistry, 1, 32, 94 Zi rconium, tris(phenylenedithio)-structure, 1, 63 Zirconium alkoxides oligomeric structure, 2,346 Zirconium chloride... [Pg.251]

Because of its high structural symmetry, tetrakis[(methyldichlorosilyl)ethyl -p-xylene was easily purified by recrystallization from THF. The less alkylated products, monoalkylated to irialkylated compounds, were also formed along with many isomers due to reorientation of the methyl group. The yields of peralkylated and less alkylated products including isomers are summarized in Table Vll. [Pg.164]

Bachman, R.E. and Schmidbaur, H. (1996) Isolation and Structural Characterization of [P(AuPPh3)5][BF4]2 via Cleavage of a P-P Bond by Cationic Gold Fragments Direct Evidence of the Structure of the Elusive Tetrakis [phosphmeaurio(I)] phosphonium(4-) Cation. Inorganic Chemistry, 35, 1399-1401. [Pg.234]

Figure 5.24 Structures ofhexafluorophosphate[5,10,15,20-tetrakis(3,5-di-tert-butylphenyl)porphyrinato]gold(lII) and derivatives. Figure 5.24 Structures ofhexafluorophosphate[5,10,15,20-tetrakis(3,5-di-tert-butylphenyl)porphyrinato]gold(lII) and derivatives.
Secondly, we describe the site-selective introduction of a functional molecule, tetrakis-5,10,15,20-(4-carboxyphenyl)porphyrin (TCPP), into the microphase separation structure of a diblock copolymer film of PS-fo-P4VP. Since porphyrin derivatives show various functionalities such as sensitization, redox activity, and nonlinear optical effect, a polymer nanodot array containing a porphyrin at a high concentration would be applicable to a light-harvesing and charge transporting nanochannel. [Pg.204]

Fig. 5.6. Crystal structure of tetrakis-P, P, P P -(4-methylphenyl)-l,l -binaphthyldi-phosphine-1,2-diphenyl-1,2-ethanediamine ruthenium borohydride catalyst. Reproduced from J. Am. Chem. Soc., 124, 6508 (2002), by permission of the American Chemical Society. Fig. 5.6. Crystal structure of tetrakis-P, P, P P -(4-methylphenyl)-l,l -binaphthyldi-phosphine-1,2-diphenyl-1,2-ethanediamine ruthenium borohydride catalyst. Reproduced from J. Am. Chem. Soc., 124, 6508 (2002), by permission of the American Chemical Society.
See other pages where Tetrakis structure is mentioned: [Pg.470]    [Pg.588]    [Pg.925]    [Pg.57]    [Pg.166]    [Pg.108]    [Pg.126]    [Pg.92]    [Pg.121]    [Pg.149]    [Pg.165]    [Pg.190]    [Pg.197]    [Pg.232]    [Pg.242]    [Pg.251]    [Pg.253]    [Pg.216]    [Pg.259]    [Pg.68]    [Pg.202]    [Pg.85]    [Pg.175]    [Pg.175]    [Pg.177]    [Pg.290]    [Pg.97]    [Pg.138]    [Pg.229]   


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Lithium,2,3,5,6-tetrakis phenyl crystal structure

Tellurium, tetrakis dichloride structure

Tetrakis complexes homoleptic structures

Thorium, tetrakis structure

Uranium, tetrakis stereochemistry structure

Uranium, tetrakis structure

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