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201 - 225 of 236
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The effects of simple salts, surfactant concn., temp., aging, pH, a nonanionic surfactant (Triton X-100), the presence of a hydrocarbon phase (n-decane) on the flow curves of an anionic surfactant, a triethylene glycol C12-15 monoether sulfate sodium salt (Neodol 25-3S) are studied. [on SciFinder(R)...
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The near-edge x-ray absorption fine structure (NEXAFS) spectra of poly(Ph thioether) polymers with pendant Fe(Cp) iron moieties have been recorded at the carbon 1s, iron 2p, and phosphorus 1s and 2p edges. This study shows that soln. photofragmentation of the organometallic polymer causes the remova...
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We have examined the electronic structure of a series of metal arene monomers and polymers by near-edge X-ray absorption fine structure spectroscopy. We observe that electron-donating or -withdrawing substituents have a measurable effect on some features in the NEXAFS spectra of these species. Howev...
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Nucleophilic substitution of chlorine in the ironcyclopentadienyl hexafluorophosphates of chlorobenzene, isomeric chlorotoluenes and dichlorobenzenes (1) with the anions generated from diethyl alkylmalonates (2) and (3) leads to the formation of ironcyclopentadienyl complexes of diethyl alkyl(substi...
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A review. A comprehensive review of organometallic polymers having various monomers, their structural characteristics and various polymn. methods is given.
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In the title compd., [Fe(C13H11O2)2], there are markedly different orientations of the two phenylmethoxycarbonyl substituents [O-C-C-C torsion angles = 84.5(3) and 139.6(2)°]. These orientations are mediated by a no. of intermol. C-H···O interactions, which result in a one-dimensional hy...
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A review. The study of metal-contg. block copolymers represents one of the most active areas in the metallopolymer field. As illustrated in this chapter, exciting possibilities exist for the development of new functional nanostructured materials via simple self-assembly approaches. Despite the obvio...
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An efficient synthesis of 3-mono or 3,4-disubstituted cinnolines from (o-dichlorobenzene)(cyclopentadienyl)iron hexafluorophosphate in 3 or 4 steps is reported. o-Chlorophenylalkyl or alkylaryl ketone complexes obtained from the o-dichlorobenzene complex upon treatment with enolate anions, react wit...
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Potassium fluoride - Celite has been found to be an effective heterogeneous catalyst in arylation of 1,3-dicarbonyl compounds with substituted arenes activated by π-complexation with the ironcyclopentadienyl moiety.
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Organometallic-mediated radical polymerization (OMRP) has emerged as a powerful new class of living controlled radical polymerization. In order to fulfill its potential in the polymerization of vinyl acetate (VOAc) and other challenging monomers, the effects of ancillary ligands on the metal-alkyl b...
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Electrolysis of arene and heterocycle cyclopentadienyliron hexafluorophosphates led to the liberation of arenes or heterocycles in 69-90% yield. The procedure described gives yields comparable with or superior to the yields obtained from pyrolytic sublimation used previously.
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A review covers the recent approaches to metal arrays on artificial DNAs and cyclic peptides. [on SciFinder(R)]
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A review. This chapter discusses the synthesis, structures, selected properties, and uses of polymers that have metal-metal bonds incorporated into their backbone chains. These materials are of interest for a no. of reasons. The primary reason is the promise of new and unusual properties. In particu...
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A review on rigid-rod transition metal polyyne polymers. [on SciFinder(R)]
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A number of benzothiazole derivatives of 2-aminopyrimidines (3a-b, 5, 6a-b, and 7), benzothiazole-3-arylacrylonitriles (10a-c), and benzothiazol-2-yl-coumarins (18a c, and 20) were synthesized by reacting benzothiazole derivatives with dicarbonyl compounds, and aromatic aldehydes. The unexpected 2-(...
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The molecular weight, thermal stability, and conductivity of chemically synthesized, self-doped poly(anilineboronic acid) have been determined. Gel permeation chromatography results indicate a number-average molecular weight of 1 676 000 g mol-1, a weight-average molecular weight of 1 760 00...
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A novel dipyrazole ethandiamide compound and acid chloride of pyrazolo[3,4-d]pyrimidine 4(5H)-one were prepared and reacted with a number of nucleophiles. The resultant novel compounds were tested in several in vitro and in vivo assays. Three compounds inhibited the secretion of neurotoxins by human...
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In this investigation, the hydration characteristics and microstructure of calcium aluminate cement (CAC) contg. different proportions of high slag (HSC) and sulfate resisting cements (SRC) were studied. The blends were made from CAC with the partial replacement of HSC or SRC of 5, 10, 15, 20 and 25...
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A novel series of functionalized thiophenes incorporating coumarin, pyrene and naphthalene pendants were synthesized by Steglich esterification in the presence of DCC/DMAP (dicyclohexylcarbodiimide/N,N-dimethylaminopyridine) and the synthesized monomers were electrochemically deposited onto glassy c...
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The reaction of dichloro-terminated organoiron complex [Fe(1,4-C6H4Cl2)Cp]+PF6- (3) with 4-hydroxybenzoic acid resulted in the formation of dicarboxylic acid organoiron complex 4. 4′-Hexyl alcohol-2,2′:6′,2″-terpyridine (hextpy) 2 was reacted with dicarboxylic acid organoiron complex 4 or th...
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Cyclic aryl ethers, thioethers or amines, and methods for synthesis are
disclosed. These cyclic aryl compounds are synthesized by combining a first
dinucleophile with a substituted benzene metallized electron-withdrawing
complex,
having halo or nitro substituent groups, to form a li...
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