Showing papers in "Journal of The Chemical Society, Chemical Communications in 1977"
TL;DR: When silvery films of the semiconducting polymer, trans polyacetylene, (CH)x, are exposed to chlorine, bromine, or iodine vapour, uptake of halogen occurs, and the conductivity increases markedly (over seven orders of magnitude in the case of iodine) to give silvery or silvery-black films, some of which have a remarkably high conductivity at room temperature.
Abstract: When silvery films of the semiconducting polymer, trans‘polyacetylene’, (CH)x, are exposed to chlorine, bromine, or iodine vapour, uptake of halogen occurs, and the conductivity increases markedly (over seven orders of magnitude in the case of iodine) to give, depending on the extent of halogenation, silvery or silvery-black films, some of which have a remarkably high conductivity at room temperature.
3,197 citations
TL;DR: The reaction of an alkynylzinc chloride with an alkenyl iodide or bromide in the presence of a catalytic amount of a Pd–phosphine complex provides the corresponding terminal or internal enyne in high yield, the stereospecificity of the reaction being 97%.
Abstract: The reaction of an alkynylzinc chloride, readily obtainable from the corresponding alkynyl-lithium and anhydrous zinc chloride, with an alkenyl iodide or bromide in the presence of a catalytic amount of a Pd–phosphine complex provides the corresponding terminal or internal enyne in high yield, the stereospecificity of the reaction being 97%.
426 citations
TL;DR: In this article, the dc and ac cyclic voltammetries of horse heart ferricytochrome c have been investigated and it is shown that in the presence of 4,4′-bipyridyl, the electrochemistry corresponds to a quasi-reversible one-electron process, from which an E° value of +0·25 V vs normal hydrogen electrode can be derived.
Abstract: The dc and ac cyclic voltammetries of horse heart ferricytochrome c have been investigated and it is shown that in the presence of 4,4′-bipyridyl, the electrochemistry corresponds to a quasi-reversible one-electron process, from which an E° value of +0·25 V vs normal hydrogen electrode can be derived
330 citations
TL;DR: In this article, weakly acidic dilute solutions containing hydroxyaluminium orthosilicate complexes were used to give a fibrous polymer, each fibre consisting of tubes about 2·2 nm external diameter and 1·0 nm internal diameter, essentially identical with those of the natural mineral imogolite.
Abstract: Heating weakly acidic dilute solutions containing hydroxyaluminium orthosilicate complexes gives a fibrous polymer, each fibre consisting of tubes about 2·2 nm external diameter and 1·0 nm internal diameter, essentially identical with those of the natural mineral, imogolite.
197 citations
TL;DR: Transition metal alkynyl complexes have been prepared conveniently in high yields under mild conditions by the direct reaction of acetylenes with metal halides in the presence of catalytic amounts of copper(I) iodide in diethylamine.
Abstract: Transition metal alkynyl complexes have been prepared conveniently in high yields under mild conditions by the direct reaction of acetylenes with metal halides in the presence of catalytic amounts of copper(I) iodide in diethylamine.
142 citations
TL;DR: In this article, the precursor of monoterpenoid Catharanthus alkaloids, which arises from the enzymatic condensation of tryptamine (I) and secologanin (II), is 3α(S)-strictosidine (isovincoside)(III) and not its 3β(R)-epimer vincosides (IV).
Abstract: In contrast to previous assumptions the precursor of monoterpenoid Catharanthus alkaloids, which arises from the enzymatic condensation of tryptamine (I) and secologanin (II), is 3α(S)-strictosidine (isovincoside)(III) and not its 3β(R)-epimer vincoside (IV).
128 citations
TL;DR: PdCl2-NaOAc catalyses the homogeneous oxidation of secondary alcohols to ketones by O2 at room temperature as discussed by the authors, but it is not suitable for high temperature.
Abstract: PdCl2–NaOAc catalyses the homogeneous oxidation of secondary alcohols to ketones by O2 at room temperature.
120 citations
TL;DR: In this paper, the structure of an X-ray diffraction model has been determined by X-Ray diffraction using But2P[CH2]5PBut2.
Abstract: IrCl3 reacts with But2P[CH2]5PBut2 to give [[graphic omitted]] which loses dihydrogen reversibly to give [[graphic omitted]], the structure of which has been determined by X-ray diffraction.
116 citations
TL;DR: In this article, it was shown that the size of the formed ring and six-but not five-membered cyclic ketones can be synthesized in this way; a rationale for this difference is presented.
Abstract: Endocyclic alkylation of ketone enolates is shown to depend critically upon the size of the so formed ring and six- but not five-membered cyclic ketones can be synthesized in this way; a rationale for this difference is presented.
98 citations
TL;DR: In this article, the formation of six products from the solvolysis of cis-[Pt(NH3)2Cl2] in Me2SO has been monitored by 195Pt n.m.r. shifts and 15N coupling constants, the products including mono-and tri-ammine species.
Abstract: The formation of six products from the solvolysis of cis-[Pt(NH3)2Cl2] in Me2SO has been monitored by 195Pt n.m.r. shifts and 195Pt–15N coupling constants, the products including mono- and tri-ammine species; the same method allows a ready identification of the more thermodynamically stable isomer of [Pt(glycinate)(Me2SO)Cl] as that with O trans to S.
90 citations
TL;DR: Rhenium heptoxide on alumina, promoted by a small amount of tetramethyltin, is an active and very selective catalyst for the heterogeneous metathesis of unsaturated fatty acid esters.
Abstract: Rhenium heptoxide on alumina, promoted by a small amount of tetramethyltin, is an active and very selective catalyst for the heterogeneous metathesis of unsaturated fatty acid esters.
TL;DR: Dimerisation of trans-4-hydroxystilbenes with horseradish peroxidase–hydrogen peroxide gives analogous products to those formed from phenylpropenoids; the product obtained from trans-resveratrol is structurally related to the phytoalexin isolated from grapevines.
Abstract: Dimerisation of trans-4-hydroxystilbenes with horseradish peroxidase–hydrogen peroxide gives analogous products to those formed from phenylpropenoids; the product (IX) obtained from trans-resveratrol is structurally related to the phytoalexin (I) isolated from grapevines but the coupling orientation is different, and both the natural and synthetic dimers of resveratrol have a similar spectrum of antifungal activity.
TL;DR: In this paper, the structures of two new naturally occurring β-lactams are proposed on the basis of spectroscopic properties and their interconversion, and two new structures are described.
Abstract: The structures of two new, naturally occurring β-lactams are proposed on the basis of spectroscopic properties, and their interconversion.
TL;DR: In this paper, the reduction of some nitroxide free radicals to the corresponding hydroxylamines is reported and a method for their quantitative determination is also presented, but the method is restricted to a single class of free radicals.
Abstract: The reduction of some nitroxide free radicals to the corresponding hydroxylamines is reported and, also, a method for their quantitative determination.
TL;DR: In this article, it was shown that high yields of excited singlet states are obtainable from stable dioxetans by appropriate substitution; a remarkable rate acceleration of the chemiluminescent reaction by surfaces is observed.
Abstract: Isolable dioxetans usually afford triplet rather than singlet excited products but we now show that high yields of excited singlet states are obtainable from stable dioxetans by appropriate substitution; a remarkable rate acceleration of the chemiluminescent reaction by surfaces is observed.
TL;DR: It is suggested that dioxetans substituted by, or reacting with, compounds with strongly electron-donating groups decompose via radical ions and that excitation occurs by electron transfer as mentioned in this paper.
Abstract: It is suggested that dioxetans substituted by, or reacting with, compounds with strongly electron-donating groups decompose via radical ions and that excitation occurs by electron transfer.
Journal Article•
TL;DR: The first example of a carbene complex of a metalloporphyrin was reported in this paper, where the reaction of 5,10,15,20-tetraphenylporphinatoiron(II)[(TPP)FeII] with carbon tetrachloride in the presence of an excess of reducing agent leads to a complex having properties consistent with the carbene, :CCl2, bound to FeII.
Abstract: The reaction of 5,10,15,20-tetraphenylporphinatoiron(II)[(TPP)FeII] with carbon tetrachloride in the presence of an excess of reducing agent leads to a complex having properties consistent with the carbene, :CCl2, bound to FeII; this is believed to be the first example of a carbene complex of a metalloporphyrin.
TL;DR: In this article, evidence was provided that silver zeolites can be used for the decomposition of water into hydrogen and oxygen; the process consists of a photochemically induced reduction of the zeolite, followed by an oxidative thermal desorption of hydrogen.
Abstract: Evidence is provided that silver zeolites can be used for the decomposition of water into hydrogen and oxygen; the process consists of a photochemically induced reduction of the zeolite, followed by an oxidative thermal desorption of hydrogen.
TL;DR: In this article, the exchange of quaternary ammonium type anion exchange beads with NaBH4 leads to useful reducing agents possessing the advantage of easy work-up.
Abstract: Exchange of quaternary ammonium type anion exchange beads with NaBH4 leads to useful reducing agents possessing the advantage of easy work-up.
TL;DR: In this article, the reaction is highly stereoselective and all-cis isomers are the chief products of the cyclohexane reaction, which is the main product of the reaction.
Abstract: [Rh(η5-C5Me5)Cl2]2 catalyses the hydrogenation of benzene and a variety of substituted benzenes to the appropriate cyclohexanes under homogeneous conditions (50 °C, 50 atm) in the presence of base (Et3N); the reaction is highly stereoselective and all-cis isomers are the chief products.
TL;DR: Heterogeneous phase transfer catalysts such as phosphonium salts and crown-ethers, immobilized on a polystyrene matrix, show an increase in activity approaching that of the corresponding non-immobilized catalysts, when they are bonded with a long spacer chain to the polymeric support as discussed by the authors.
Abstract: Heterogeneous phase-transfer catalysts, such as phosphonium salts and crown-ethers, immobilized on a polystyrene matrix, show an increase in activity approaching that of the corresponding non-immobilized catalysts, when they are bonded with a long spacer chain to the polymeric support.
TL;DR: The reaction of thiols with N2O4 in an inert organic solvent such as CCl4 or ether at low temperatures afforded aryl and alkyl thionitrites in quantitative yields.
Abstract: The reaction of thiols with N2O4 in an inert organic solvent such as CCl4 or ether at low temperatures afforded aryl and alkyl thionitrites in quantitative yields; the thionitrites thus obtained reacted very readily with other thiols or sulphinic acids to give unsymmetrical disulphides or thiolsulphonates in nearly quantitative yields.
TL;DR: Several bis-steroids derived from conessine or cholic acid solubilise perylene into aqueous solution without evidence of micelle formation, and cause spectral changes in pinacyanol iodide; however, these effects (characteristic of hydrophobic interaction) only on micellisation or not at all as discussed by the authors.
Abstract: Several bis-steroids derived from conessine or cholic acid solubilise perylene into aqueous solution without evidence of micelle formation, and cause spectral changes in aqueous pinacyanol iodide; mono-steroids examined show these effects (characteristic of hydrophobic interaction) only on micellisation or not at all.
TL;DR: The structure of the antibiotic micrococcin P has been determined by 13C n.r.m. spectroscopy using X-ray diffraction for the determination of the Na6(CO3)(SO4)2, Na2SO4 complex.
Abstract: The structure of the antibiotic micrococcin P has been determined by 13C n.m.r. spectroscopy.
TL;DR: In this article, neutral rhodium(I) complexes with phosphine ligands were used for α-keto esters in dry benzene or tetrahydrofuran to give optically active lactates.
Abstract: The hydrogenation of α-keto esters was found to be catalysed effectively by neutral rhodium(I) complexes with phosphine ligands, and the asymmetric hydrogenation of pyruvates was carried out using the rhodium(I) complexes with chiral diphosphines 2,3-O-isopropylidene-2,3-dihydroxy-1,4-bis(diphenylphosphino)butane (diop), and (2S,4S)-N-t-butoxycarbonyl-4-diphenylphosphino-2-diphenylphosphinomethylpyrrolidine (bppm), in dry benzene or tetrahydrofuran to give optically active lactates (36–76% enantiomeric excess) in nearly quantitative yields.
TL;DR: In this paper, it has been found that surfactant derivatives of tris(2,2′-bipyridyl)ruthenium(II)(2) do not sensitise the photodissociation of water into its elements.
Abstract: Contrary to a previous report, it has been found that surfactant derivatives of tris(2,2′-bipyridyl)ruthenium(II)(2) do not sensitise the photodissociation of water into its elements.
TL;DR: The Raman spectrum of CO adsorbed on a platinized platinum electrode surface exhibited a weak line at 2096 cm−1 and a broader feature centred at ca. 2081 cm-1; these features have been interpreted in terms of terminal surface CO groupings as discussed by the authors.
Abstract: The Raman spectrum of CO adsorbed on a platinized platinum electrode surface exhibited a weak line at 2096 cm–1 and a broader feature centred at ca. 2081 cm–1; these features have been interpreted in terms of terminal surface –CO groupings.
TL;DR: In this paper, it was shown that in phase transfer catalysis, the transport of anions from one phase into the other does not require the concomitant transfer of the organic cation; kinetic measurements indicate that the effectiveness of the catalyst depends essentially on its organophilicity.
Abstract: Using liquid membranes it was shown that in phase-transfer catalysis the transport of anions from one phase into the other does not require the concomitant transfer of the organic cation; kinetic measurements indicate that the effectiveness of the catalyst depends essentially on its organophilicity.
TL;DR: The heptaosmium carbonyl, [Os7(CO)21], has been fully characterised in the solid state by single crystal X-ray analysis; the structure in solution has also been established by 13C n.m.r.
Abstract: The heptaosmium carbonyl, [Os7(CO)21], has been fully characterised in the solid state by single crystal X-ray analysis; the structure in solution has also been established by 13C n.m.r. spectroscopy.