Showing papers in "Journal of The Chemical Society, Chemical Communications in 1983"
TL;DR: In this article, an efficient photogeneration of either (CO + H2) simultaneously, or CO selectively, occurs on visible light irradiation of CO2 solutions in (HOCH2CH2)3N-dimethylformamide containing, respectively, Ru(bipy)32+−Co2+ combinations or the single component Re(Bipy)(CO)3X (X = Cl, Br) as homogeneous catalysts.
Abstract: Efficient photogeneration of either (CO + H2) simultaneously, or CO selectively, occurs on visible light irradiation of CO2 solutions in (HOCH2CH2)3N–dimethylformamide containing, respectively, Ru(bipy)32+–Co2+ combinations or the single component Re(bipy)(CO)3X (X = Cl, Br) as homogeneous catalysts.
550 citations
TL;DR: In this article, a radical chain decarboxylation to the corresponding noralkane on treatment with either tri-nbutylstannane or t-butylmercaptan was shown to give noralkyl 2-pyridyl sulphides.
Abstract: Carboxylic acid esters derived from N-hydroxypyridine-2-thione undergo efficient radical chain decarboxylation to the corresponding nor-alkane on treatment with either tri-n-butylstannane or t-butylmercaptan; in the absence of these hydrogen atom donors a smooth decarboxylative rearrangement giving noralkyl 2-pyridyl sulphides is observed.
262 citations
TL;DR: Bis(pentamethylcyclopentadienyl)lutetium complexes Lu(η5-C5Me5)2R (R = Me, H) react at 20-50 °C in hydrocarbon solvents with benzene, pyridine, the ylide CH2PPh3, and tetramethylsilane to give stable, isolatable products of C-H activation.
Abstract: Bis(pentamethylcyclopentadienyl)lutetium complexes Lu(η5-C5Me5)2R (R = Me, H) react at 20–50 °C in hydrocarbon solvents with benzene, pyridine, the ylide CH2PPh3, and tetramethylsilane to give stable, isolatable products of C–H activation, i.e. metallation at a carbon of the reagent with extrusion of R–H.
174 citations
TL;DR: In this article, the genetically modified bacteria Pseudominium putida was used as an oxidation catalyst compound for polyphenylene fibres and films, which can be used to make fibres.
Abstract: Starting from benzene and oxygen and using the genetically modified bacteria Pseudominium putida as an oxidation catalyst compound (6) is readily obtained; derivative of the latter are soluble in organic solvents and polymerise to give a soluble precursor (5) which can be used to make fibres and films which on heating are converted into polyphenylene fibres and films.
152 citations
TL;DR: The first macrobicyclic crown compound with two cavities (one hydrophilic and one lypophilic) and two additional ionizable binding sites was proposed in this paper.
Abstract: Capping of p-t-butyl-calix[4]arene (1a) with pentaethylene glycol ditoluene-p-sulphonate and ButOK in benzene leads to the first member of a new class of macrobicyclic crown compounds (2), which possess two cavities (one hydrophilic and one lypophilic) and two additional, ionizable binding sites.
140 citations
TL;DR: The group 4 metal(II) bis(trimethylsilyl)amides, M[N(SiMe3)2]2, are V-shaped monomers both in the crystal (M = Sn or Pb) at 140 K and in the vapour (m = Ge, Sn, or PB) at ca. 380 K, with ∠NMN in the liquid being 101(1.5), 96, or 91(2)° for M = Ge or Sn respectively.
Abstract: The group 4 metal(II) bis(trimethylsilyl)amides, M[N(SiMe3)2]2, are V-shaped monomers both in the crystal (M = Sn or Pb) at 140 K and the vapour (M = Ge, Sn, or Pb) at ca. 380 K, with ∠NMN in the vapour being 101(1.5), 96, or 91(2)° for M = Ge, Sn, or Pb respectively [but 104.7(2)(M = Sn) or 103.6(7)°(M = Pb) in the solid].
133 citations
TL;DR: In this paper, five new classes of crystalline, hydrocarbon-soluble group 3A metal aryloxides are reported: (1), (2), (3), (4), (5), (6), (7), (8), (9), (10), (11), (12), (13), (14), (15), (16), (17), (18), (19), (20), (21), (22), (23), (24), (25), (26), (27), (28), (30),
Abstract: Five new classes of crystalline, hydrocarbon-soluble group 3A metal (M) aryloxides are reported: [M(OAr)3], (1), [M(L)(OAr)3][L = tetrahydrofuran (thf) or P(O)Ph3], [M(OAr)2(µ-OAr)2Na(thf)2], Li[Yb(Cl)(OAr)3], and [{Y(Cl)(OAr)(µ-OAr)}2](Ar = C6H2Me-4-But2-2,6), ranging for (1) from M3+ being the 3d°, 4d°, to the 4fn(n= 0, 1, 2, 3, 9,10, 11, or 13) ion; the title compound (1)(M = Sc) has an approximately trigonal planar ScO3 skeleton (Sc 0.13 A out of the O3 plane) with av. Sc–O 1.869(15)A, av. O–Sc–O 119.5(2)°, and av. Sc–O–C 168.4(5)°
129 citations
TL;DR: Asymmetric reduction of prochiral aromatic ketones with the reagent prepared from (S)-(−)-2-amino-3-methyl-1,1-diphenylbutan-1-ol [(S]-(1)] and borane afforded the corresponding aromatic secondary alcohols in high optical (94−100% enantiomeric excess) and chemical (100%) yields as discussed by the authors.
Abstract: Asymmetric reduction of prochiral aromatic ketones with the reagent prepared from (S)-(–)-2-amino-3-methyl-1,1-diphenylbutan-1-ol [(S)-(1)] and borane afforded the corresponding aromatic secondary alcohols in high optical (94–100% enantiomeric excess) and chemical (100%) yields.
120 citations
TL;DR: The title compound [Cu(dpp)2]+(dpp = 2,9-diphenyl-1,10-phenanthroline) exhibits long-lived emission at room temperature in solution, and in contrast with copper(I) complexes of less bulky ligands, the emission persists in polar media as discussed by the authors.
Abstract: The title compound, [Cu(dpp)2]+(dpp = 2,9-diphenyl-1,10-phenanthroline), exhibits long-lived emission at room temperature in solution, and in contrast with copper(I) complexes of less bulky ligands, the emission persists in polar media; a water soluble derivative of [Cu(dpp)2]+ is luminescent at room temperature in aqueous solution and undergoes efficient redox photochemistry in the presence of electron acceptors.
120 citations
TL;DR: In this paper, a second order rate law for cyclopentadienyl substitution by triphenylphosphine (PPh3) was proposed for the indenyl compounds.
Abstract: Carbonyl substitution by triphenylphosphine (PPh3) in the indenyl compounds Rh(η-C9H7)(CO)2 and Mn(η-C9H7)(CO)3 proceeds by a second order rate law which is first order in complex and first order in PPh3 and in both cases the rates are much faster than for the corresponding cyclopentadienyl complexes; for rhodium a rate enhancement of 108 is found for the indenyl compound over the corresponding cyclopentadienyl compound.
111 citations
TL;DR: Drimane and eudesmane have been identified in petroleum; eudesmanse is formed from higher plant precursors while drimane is probably derived from microbial sources as mentioned in this paper.
Abstract: Drimane and eudesmane have been identified in petroleum; eudesmane is formed from higher plant precursors while drimane is probably derived from microbial sources.
TL;DR: A blue-black first-stage graphite fluoride, CxF (5 > x > 2), is made by intercalation of graphite with fluorine in the presence of liquid hydrogen fluoride, at ca. 20 °C, the oxidation (which is electrochemically reversible for x > 0.6) proceeding via a highly conductive second stage salt: C12+HF2− as mentioned in this paper.
Abstract: A blue-black first-stage graphite fluoride, CxF (5 > x > 2), in which the planar carbon-atom sheets of graphite are preserved, is made by intercalation of graphite with fluorine in the presence of liquid hydrogen fluoride, at ca. 20 °C, the oxidation (which is electrochemically reversible for x > 2.6) proceeding via a highly conductive second stage salt: C12+HF2–.
TL;DR: A general procedure for evaluating the number of cluster valence molecular orbitals in molecules with condensed polyhedral geometries has been derived from molecular orbital calculations and shown to be widely applicable as mentioned in this paper.
Abstract: A general procedure for evaluating the number of cluster valence molecular orbitals in molecules with condensed polyhedral geometries has been derived from molecular orbital calculations and shown to be widely applicable.
TL;DR: In this paper, selective catalytic dehydrogenation (up to 9 turnovers) of cycloalkanes CnH2n(n= 6, 7, and 8) was achieved, under mild conditions (30-80 °C), using dilute (ca. 3 mM) solutions of the bis(phosphine) rhenium heptahydrides (Ar3P)2ReH7(Ar =p-F-;C6H4, Ph, and p-Me-C 6H4) in the cyclo
Abstract: Selective catalytic dehydrogenation (up to 9 turnovers) of cycloalkanes CnH2n(n= 6, 7, and 8) to the corresponding cycloalkenes is achieved, under mild conditions (30–80 °C), using dilute (ca. 3 mM) solutions of the bis(phosphine) rhenium heptahydrides (Ar3P)2ReH7(Ar =p-F-;C6H4, Ph, and p-Me-C6H4) in the cycloalkane, with an olefin as the hydrogen acceptor.
TL;DR: In this article, the authors describe the polymerization of thiophene to give a metallic film with a conductivity of ca. 100 S/cm, and which becomes a semiconductive polymer with an optical absorption edge of 2.0 eV when reduced by electrochemical or chemical means.
Abstract: Electrolytic polymerization of thiophene gives a metallic film with a conductivity of ca. 100 S/cm, and which becomes a semiconductive polymer with an optical absorption edge of 2.0 eV when reduced by electrochemical or chemical means.
TL;DR: In this paper, the CO-bridged dimer was proposed, on the basis of i.r. evidence including 13CO enrichment and u.v. visible spectra.
Abstract: Photolysis of [{(η5-C5H5)Fe(CO)2}2] in CH4(12 K) and polyvinyl chloride film (12–77 K) matrices leads to the formation of a novel species proposed, on the basis of i.r. evidence including 13CO enrichment and u.v.– visible spectra, to be the CO-bridged dimer [(µ-CO)3{(η5-C5H5)Fe}2].
TL;DR: In this article, photoelectron spectroscopy indicates that the reaction intermediate lies flat and that competitive formation of ethylene involves an intermediate with perpendicular adsorption geometry, which is not the case for benzene.
Abstract: Acetylene reacts to form benzene on Pd(111) at ca. 200 K; photoelectron spectroscopy indicates that the reaction intermediate lies flat, and that competitive formation of ethylene involves an intermediate with perpendicular adsorption geometry.
TL;DR: In this article, N-hydroxyphthalimide is shown to be an effective electron carrier in the electrochemical oxidation of alcohols to the corresponding carbonyl compounds, and it is shown that it is a suitable electron carrier for electron transport.
Abstract: N-Hydroxyphthalimide is shown to be an effective electron carrier in the electrochemical oxidation of alcohols to the corresponding carbonyl compounds.
TL;DR: In this article, the optical yields in the asymmetric hydroformylation of styrene (up to 95%) have been found to be considerably lower than previously estimated optical yields.
Abstract: Previously estimated optical yields in the asymmetric hydroformylation of styrene (up to 95%) have been found to be considerably lower (up to 73%).
TL;DR: In this article, a system comprising hydrogen sulphide and iron powder in pyridine containing acetic acid and a little water was used to oxidize adamantane with unusual efficiency.
Abstract: The oxidation of adamantane can be achieved with unusual efficiency using molecular oxygen and a system comprising hydrogen sulphide and iron powder in pyridine containing acetic acid and a little water.
TL;DR: The first X-ray crystal structure of an oxochromium(V) complex capable of effecting oxygen atom transfer to alkenes in stoicheiometric and catalytic systems is reported in this article.
Abstract: The first X-ray crystal structure of an oxochromium(V) complex capable of effecting oxygen atom transfer to alkenes in stoicheiometric and catalytic systems is reported.
TL;DR: In this paper, carbon radicals derived from tetra-acetylglucosyl and β-alanyl derivatives to acrylic acid or esters were added to obtain a short route to a C-glucose and a functionalised α-amino acid, respectively.
Abstract: Addition of carbon radicals derived from tetra-acetylglucosyl and β-alanyl derivatives to acrylic acid or esters provides a short route to a C-glucoside and a functionalised α-amino-acid, respectively.
TL;DR: A crystal structure determination on the tetrahydrofuran adduct of tris(trimethylsilyl)methyl-lithium has shown it to be an ate complex, [Li(thf)4][Li{C(SiMe3)3}2] as mentioned in this paper.
Abstract: A crystal structure determination on the tetrahydrofuran adduct of tris(trimethylsilyl)methyl-lithium has shown it to be an ate complex, [Li(thf)4][Li{C(SiMe3)3}2].
TL;DR: The crystal structure of the title compound at 128 K confirms the presence of the pentazole ring which, as a substituent, appears to have an inductive effect similar to that of the nitro group.
Abstract: The crystal structure of the title compound at 128 K confirms the presence of the pentazole ring which, as a substituent, appears to have an inductive effect similar to that of the nitro group.
TL;DR: The silica in some biominerals has been investigated by electron microscopy and n.m.r. spectroscopy and has been shown to be amorphous and to contain many Si-OH units as mentioned in this paper.
Abstract: The silica in some biominerals has been investigated by electron microscopy and i.r. and n.m.r. spectroscopy and has been shown to be amorphous and to contain many Si–OH units.
TL;DR: The 1:1 complex between an osmate ester and bovine serum albumin was found to be effective as an enantioselective catalyst in the cis-hydroxylation of alkenes, affording diols in up to 68% e.g. as discussed by the authors.
Abstract: The 1:1 complex between an osmate ester and bovine serum albumin was found to be effective as an enantioselective catalyst in the cis-hydroxylation of alkenes, affording diols in up to 68% e.e. and turnover of the catalyst with t-butyl hydroperoxide.
TL;DR: A new cytotoxic cyclic peptide, ascidiacyclamide, has been isolated from ascidian and its structure has been elucidated by n.r.m. spectroscopy.
Abstract: A new cytotoxic cyclic peptide, ascidiacyclamide, has been isolated from ascidian and its structure has been elucidated by n.m.r. spectroscopy.
TL;DR: Ketoesters of 8-phenylmenthol undergo reduction with potassium tri-isopropoxyborohydride, addition of Grignard reagents, and ene reactions with asymmetric induction levels of 90% and above as mentioned in this paper.
Abstract: Ketoesters of 8-phenylmenthol undergo reduction with potassium tri-isopropoxyborohydride, addition of Grignard reagents, and ene reactions with asymmetric induction levels of 90% and above.
TL;DR: In this paper, a cyclic pentameric arylcopper (I) complex (CuMes)5 in the solid state was shown to undergo ring contraction with tetrahydrothiophene to the corresponding tetrameric species [Cu4Mes4(C4H8S)2], the structure of which has been found by X-ray crystallography.
Abstract: Mesitylcopper(I)(CuMes)n was shown by an X-ray analysis to be a cyclic pentameric arylcopper(I) complex (CuMes)5 in the solid state, which undergoes ring contraction with tetrahydrothiophene to the corresponding tetrameric species [Cu4Mes4(C4H8S)2], the structure of which has been found by X-ray crystallography.