Showing papers in "Journal of The Chemical Society, Chemical Communications in 1985"
TL;DR: In this paper, the cyclic voltammetry of fac-Re(bpy)(CO)3Cl (bpy = 2,2′-bipyridine) and of the intermediate complexes formed by bulk electrolysis in MeCN solution in the presence and absence of CO2 has been interpreted in terms of two different electrocatalytic pathways for the reduction of CO 2 to Co, one involving an initial one-electron reduction and the other an initial two-electricron reduction.
Abstract: The cyclic voltammetry of fac-Re(bpy)(CO)3Cl (bpy = 2,2′-bipyridine) and of the intermediate complexes formed by bulk electrolysis in MeCN solution in the presence and absence of CO2 has been interpreted in terms of two different electrocatalytic pathways for the reduction of CO2 to Co, one involving an initial one-electron reduction and the other an initial two-electron reduction.
309 citations
TL;DR: In this article, it was shown that irradiation (γ>290 nm) of an aqueous suspension of poly(p-phenylene) leads to photocatalytic H2 evolution in the presence of triethylamine or diethylamine.
Abstract: Irradiation (γ>290 nm) of an aqueous suspension of poly(p-phenylene) leads to photocatalytic H2 evolution in the presence of triethylamine or diethylamine.
241 citations
TL;DR: In this paper, the α-isocyanoacetate esters were used to synthesize 5-unsubstituted pyrroles in the presence of base.
Abstract: Nitroalkenes, or their β-acetoxynitro precursors, react with α-isocyanoacetate esters in the presence of base to give high yields of 5-unsubstituted pyrroles; some important pyrroles are easily synthesised by this method.
183 citations
TL;DR: Aminomethyl-anthracene derivatives have been shown to form a series of fluorescent pH indicators with spectral properties independent of substituents and pH except for the fluorescent quantum yield, which show that their pKa* values are identical to the corresponding pKa values as discussed by the authors.
Abstract: Aminomethyl-anthracene derivatives (1) and (2) form a series of fluorescent pH indicators with spectral properties independent of substituents and pH except for the fluorescent quantum yield, which show that their pKa* values are identical to the corresponding pKa values.
145 citations
TL;DR: Fmoc-amino acid pentafluorophenyl esters have been used successfully in the synthesis of a difficult decapeptide sequence using a polar reaction medium and resin support.
Abstract: Fmoc-amino acid pentafluorophenyl esters have been used successfully in the synthesis of a difficult decapeptide sequence using a polar reaction medium and resin support.
140 citations
TL;DR: In this paper, the conductivities of thiophene, 3-methylthiophene and 3-ethylthiophenes in propylene carbonate were investigated and the results showed that they have conductivities between 190, 510, and 270 S cm−1, respectively.
Abstract: Electrochemical polymerization of thiophene, 3-methylthiophene, and 3-ethylthiophene in propylene carbonate gave tough films, having conductivities of 190, 510, and 270 S cm–1, respectively.
115 citations
TL;DR: In this article, the cyclic triamines 1,4,7-triazcyclonononane and (N,N′,N″-trimethyl-1, 4, 7)-triazacyclononanes were synthesized from Mn(MeCO2)3·2H2O in water-ethanol mixtures; characterization by X-ray crystallography showed that both complexes contain a µ-oxo-di-µ-acetato-metal(III) core.
Abstract: The complexes [L2MnIII2(µ-O)(µ-MeCO2)2](ClO4)2, (1), and [L′2MnIII2(µ-O)(µ-MeCO2)2](ClO4)2·H2O, (2), where L and L′ represent the cyclic triamines 1,4,7-triazcyclononane and (N,N′,N″-trimethyl-1,4,7-triazacyclononane, have been synthesized from Mn(MeCO2)3·2H2O in water–ethanol mixtures; characterization by X-ray crystallography showed that both complexes contain a µ-oxo-di-µ-acetato-metal(III) core, as found in hemerythrin, and therefore these complexes may have bioinorganic significance.
113 citations
TL;DR: RuCl2(COD) and RuCl4(p-toly-BINAP)2(NEt3) as mentioned in this paper gave new chiral ruthenium(II) complexes for asymmetric hydrogenation of alkenes.
Abstract: Reactions of [RuCl2(COD)]n(COD = cyclo-octa-1,5-diene) with the chiral bidentate phosphine ligands 2,2′-bis(diphenylphosphino)-1,1′-binaphthyl, BINAP, and 2,2′-bis(di-p-tolylphosphino)-1,1′-binaphthyl, p-tolyl-BINAP, give new chiral ruthenium(II) complexes, Ru2Cl4(BINAP)2(NEt3)and Ru2Cl4(p-toly-BINAP)2(NEt3) respectively, which serve as excellent catalysts for asymmetric hydrogenation of alkenes and some cyclic anhydrides.
111 citations
TL;DR: Several galliophosphate frameworks have been synthesised; some of the structures are related to the AlPO4-family of molecular sieves and the structure of {(PriNH3)[Ga4(PO4)4·OH]}·H2O has been shown to be related to AlPO 4-12,15, and -21.
Abstract: Several galliophosphate frameworks have been synthesised; some of the structures are related to the AlPO4-family of molecular sieves and the structure of {(PriNH3)[Ga4(PO4)4·OH]}·H2O has been shown to be related to AlPO4-12,-15, and -21.
111 citations
TL;DR: Calix[4]-, [6]-, and [8]-arenes have been converted into a series of alkyl acetates which show significant phase transfer activity and selectivity towards alkali metal picrates; the X-ray crystal structure of two members of the series, (1b) and (2d) have been determined as mentioned in this paper.
Abstract: Calix[4]-, [6]-, and [8]-arenes have been converted into a series of alkyl acetates which show significant phase-transfer activity and selectivity towards alkali metal picrates; the X-ray crystal structure of two members of the series, (1b) and (2d), have been determined.
111 citations
TL;DR: When electropolymerized, the complex Re(vbpy)(CO)3Cl as mentioned in this paper, as a polymeric film on a Pt electrode, electrocatalytically reduces CO2 to CO with turnover numbers greatly exceeding those observed for the analogous electrocatalysistic reduction of CO2 by Re(bpy)CO3Cl in homogeneous solution (bpy = 2,2′-bipyridine).
Abstract: When electropolymerized, the complex Re(vbpy)(CO)3Cl (vbpy = 4-vinlyl-4′-methyl-2,2′-bipyridine), as a polymeric film on a Pt electrode, electrocatalytically reduces CO2 to CO with turnover numbers greatly exceeding those observed for the analogous electrocatalytic reduction of CO2 by Re(bpy)(CO)3Cl in homogeneous solution (bpy = 2,2′-bipyridine).
TL;DR: The first crystal structures of a catenane and of a metalio-catenate were reported in this article, and upon complexation with CuI, there was a dramatic change in molecular shape.
Abstract: The first crystal structures of a catenane and of a metalio-catenate are reported; upon complexation with CuI, there is a dramatic change in molecular shape.
TL;DR: Polyaniline was electrochemically doped to three electrically and spectroscopically distinctive forms; the closed valence-shell oxidized and reduced forms and the radical intermediate form as discussed by the authors.
Abstract: Polyaniline was electrochemically doped to three electrically and spectroscopically distinctive forms; the closed valence-shell oxidized and reduced forms and the radical intermediate form.
TL;DR: The hexa-(p-n-dodecyloxybenzoyl) derivatives of macrocyclic polyamines [18]-N6, [24]- N6O2, and [27]-n6O3 display a liquid crystal phase in which the macro-cyclic units are stacked, forming a tubular mesophase.
Abstract: The hexa-(p-n-dodecyloxybenzoyl) derivatives (1b), (2b), and (3b) of the macrocyclic polyamines [18]-N6, [24]-N6O2, and [27]-N6O3 display a liquid crystal phase in which the macrocyclic units are stacked, forming a tubular mesophase.
TL;DR: Ring-opening polymerization of epoxide catalysed by a (tetraphenylporphinato)aluminium chloride-alcohol system affords a polyether having a controlled molecular weight of narrow distribution with the number of the polymer molecules exceeding the numberof aluminium porphyrin molecules, resulting in the ‘immortal’ nature ofThe polymerization.
Abstract: Ring-opening polymerization of epoxide catalysed by a (tetraphenylporphinato)aluminium chloride-alcohol system affords a polyether having a controlled molecular weight of narrow distribution with the number of the polymer molecules exceeding the number of aluminium porphyrin molecules; this is due to exchange between the alcohol and the (porphinato)aluminium alkoxide, which is the active species, resulting in the ‘immortal’ nature of the polymerization.
TL;DR: In the presence of imidazole, Mn-(or Fe-) porphyrins catalyse the epoxidation of various alkenes including alk-1-enes by H2O2 as mentioned in this paper.
Abstract: In the presence of imidazole, Mn-(or Fe-) porphyrins catalyse the epoxidation of various alkenes including alk-1-enes by H2O2; with chloromanganese(tetra-2,6-dichlorophenylporphyrin) as a catalyst, alkene conversion by a few equivalents of H2O2 is complete within less than 1 h at 20 °C and epoxide yields are very high (90–99%).
TL;DR: Visible light irradiation of Ru(bipy)3Cl2 (bipY = 2,2′-bipyridine) in dimethylformamide-triethanolamine medium containing carbon dioxide, leads to efficient and preferential reduction of the latter to formate as mentioned in this paper.
Abstract: Visible light irradiation of Ru(bipy)3Cl2(bipy = 2,2′-bipyridine) in dimethylformamide–triethanolamine medium containing carbon dioxide, leads to efficient and preferential reduction of the latter to formate.
TL;DR: In this article, a new catalytically active cluster prepared by reduction of Pd(OAc)2 by H2 in the presence of L = 1,10-phenanthroline, or 2,2′-bipyridine, followed by O2 treatment, contains a close-packed metal nucleus (570 ± 30 Pd atoms) bearing 60 ± 3 co-ordinated L and 180 ± 10 OAc-in the outer sphere of the cluster.
Abstract: Electron microscopy, electron diffraction, EXAFS, and ultracentrifuging data show that a new catalytically active cluster prepared by reduction of Pd(OAc)2 by H2 in the presence of L = 1,10-phenanthroline, or 2,2′-bipyridine, followed by O2 treatment, contains a close-packed metal nucleus (570 ± 30 Pd atoms) bearing 60 ± 3 co-ordinated L and 180 ± 10 OAc– in the outer sphere of the cluster.
TL;DR: Yuehchukene, a novel dimeric indole alkaloid with potent anti-implantation activity has been isolated from the roots of Murraya paniculata and identified as a racemic mixture of 6β-(3′-indolyl)-7α,7β,9-trimethyl-6aβ7,8,10aβ-tetrahydroindeno[2,1-b]indole (1) and its enantiomer.
Abstract: Yuehchukene, a novel dimeric indole alkaloid with potent anti-implantation activity has been isolated from the roots of Murraya paniculata and identified as a racemic mixture of 6β-(3′-indolyl)-7α,7β,9-trimethyl-6aβ7,8,10aβ-tetrahydroindeno[2,1-b]indole (1) and its enantiomer
TL;DR: The ruthenium-catalysed oxidation of secondary amines with t-butyl hydroperoxide under mild conditions affords the corresponding imines in high yields.
Abstract: The ruthenium-catalysed oxidation of secondary amines with t-butyl hydroperoxide under mild conditions affords the corresponding imines in high yields.
TL;DR: A new coordination mode for benzene ligands in cluster complexes, in which the ring is symmetrically placed above a metal triangle has been crystallographically established in the carbonyl complexes.
Abstract: A new co-ordination mode for benzene ligands in cluster complexes, in which the ring is symmetrically placed above a metal triangle has been crystallographically established in the carbonyl complexes [Ru6C(CO)11(µ3-η2: η2:η2-C6H6)(η6-C6H6)] and [Os3(CO)9(µ3-η2: η2:η2-C6H6)].
TL;DR: In this article, a new synthetic strategy for the regio-and stereo-specific synthesis of tetrahydropyran systems involving 6-endo epoxide openings and its applicaiton to the construction of the ABC ring system of brevetoxin B are described.
Abstract: A new synthetic strategy for the regio- and stereo-specific synthesis of tetrahydropyran systems involving 6-endo epoxide openings and its applicaiton to the construction of the ABC ring system of brevetoxin B are described.
TL;DR: Asymmetric ring-opening of prochiral cyclic acid anhydrides with methanol was effected by a catalytic amount of cinchona alkaloids with an enantiomeric excess of up to 70% and the product was converted into optically active lactones as mentioned in this paper.
Abstract: Asymmetric ring-opening of prochiral cyclic acid anhydrides (1) with methanol was effected by a catalytic amount of cinchona alkaloids (2) with an enantiomeric excess of up to 70% and the product was converted into optically active lactones
TL;DR: The first graft copolymer of polypyrrole has been synthesized by electrochemically polymerizing pyrrole in the presence of polystyrene as discussed by the authors, which exhibited an electrical conductivity comparable to that of polypolypyroxide.
Abstract: The first graft copolymer of polypyrrole has been synthesized by electrochemically polymerizing pyrrole in the presence of pyrrole derivatized polystyrene; the copolymer produced exhibited an electrical conductivity comparable to that of polypyrrole.
TL;DR: In this article, the volatile compounds emitted by sexually mature male mediterranean fruit flies (Ceratitis capitata) have been identified and the key component involved in the sexual attraction of virgin female flies to males demonstrated to be the novel sex pheromone 3,4-dihydro-2H-pyrrole (1).
Abstract: The volatile compounds emitted by sexually mature male mediterranean fruit flies (Ceratitis capitata) have been identified and the key component involved in the sexual attraction of virgin female flies to males demonstrated to be the novel sex pheromone 3,4-dihydro-2H-pyrrole (1).
TL;DR: In this paper, the reduction of CO2 to either CO or formate ion in MeCN solution has been shown to occur using precursor complexes such as Ru(trpy)(dppene)Cl+ or cis-Rh(bpy)2(TFMS)2+.
Abstract: Electrocatalytic reduction of CO2 to either CO or formate ion in MeCN solution has been shown to occur using precursor complexes such as Ru(trpy)(dppene)Cl+ or cis-Rh(bpy)2(TFMS)2+[trpy = 2,2′,2″-terpyridine; dppene =cis-1,2-bis(diphenylphosphino)ethylene; bpy = 2,2′-bipyridine; TFMS = trifluoromethanesulphonate anion].
TL;DR: In this article, a series of reduction-oxidation related pairs of transition metal phosphine complexes were investigated and it was shown that P-substitution σ* orbitals were present in the πacceptor function of the phosphine.
Abstract: Examination of metal–phosphorus and phosphorus–substituent atom bond length in a series of reduction–oxidation related pairs of transition metal phosphine complexes yields evidence of the participation of P–substitution σ* orbitals in the π-acceptor function of the phosphine.
TL;DR: The derivatisation of alcohols as their methyl oxalyl esters is shown to be a convenient and selective method for deoxygenation by stannyl radicals.
Abstract: The derivatisation of alcohols as their methyl oxalyl esters is shown to be a convenient and selective method for deoxygenation by stannyl radicals.
TL;DR: In this article, 8-Quinolinyl alkyl ketones, which have β-hydrogens, react with various RhI and IrI complexes under ethylene to give, in a catalytic process, 8- quinolinear ethyl ketone; the same reaction with 8-quinolinyl phenyl ketones produces styrene via the insertion into a rhodium-phenyl bond and β-elimination of the resulting phenylethyl complex.
Abstract: 8-Quinolinyl alkyl ketones, in which the alkyl group has β-hydrogens, react with various RhI and IrI complexes under ethylene to give, in a catalytic process, 8- quinolinyl ethyl ketone; the same reaction with 8-quinolinyl phenyl ketone produces styrene via ethylene insertion into a rhodium–phenyl bond and β-elimination of the resulting phenylethyl complex.
TL;DR: In this article, the formation of a copper(III) species, rather than the hydroxyl free radical, when the aquocopper(I) ion reacts hydrogen peroxide in aqueous solution, was investigated.
Abstract: Kinetic evidence support the formation of a copper(III) species, rather than the hydroxyl free radical, when the aquocopper(I) ion reacts hydrogen peroxide in aqueous solution.