Browsing Chemistry (Scholarly Publications) by Date of Publication
Now showing items 21-40 of 875
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Substituted 3,4-pyridynes: clean cycloadditions
(Royal Society of Chemistry, 2000)The stabilisation of 3,4-pyridyne (1) by an alkoxy group adjacent to the ring nitrogen is reported. The regioselective lithiation of 2-ethoxy- (14), 2-methoxy- (18), 2-isopropoxy- (19) and 6-isopropoxy- (26) -3-chloropyridines ... -
Benzylic Oligothioethers as Ditopic Ligands for Group 6 Transition Metal Carbonyls
(2000)The co-ordination preferences of a family of novel thioethers based on (alkylsulfanylmethyl)benzene were examined. The alkyl chain length and the number and position of the thioether substituents were varied. The ligands ... -
Palladium bis(phosphinite) 'PCP'-pincer complexes and their application as catalysts in the Suzuki Reaction
(2000)Palladium complexes of inexpensive, easily synthesised bis(phosphinite) `PCP ?-pincer ligands show good activity in the Suzuki coupling of deactivated and sterically hindered aryl bromides -
The origin of the electron distribution in SnO
(2001)The origin of the electron distribution in SnO Graeme W. Watson Department of Chemistry, Trinity College, Dublin 2, Ireland ~ Received 12 September 2000; accepted 17 October 2000 ! Gradient corrected density functional ... -
Theoretical study of the valence and core photoemission spectra of C-60
(2001)The photoionization cross section and angular distribution relative to all primary ionizations in C60 have been computed employing a convergent one-centre expansion and an LDA hamiltonian over an extended energy range. The ... -
Ferrocenylalkynes as ligands in transition metal complexes
(2001)Several ferrocenylalkynes have been prepared and their reaction with dicobalt octacarbonyl led to the formation of [Co2(CO)6(?-?2 ? ?2-ethynylferrocene)] 1, [Co2(CO)6(?-?2 ? ?2-1,4-bis(ferrocenyl)butadiyne)] 2, [(Co2(CO)6)2(?-?2 ... -
Preparation of oxime oxalate amides and their use in free-radical mediated syntheses of lactams.
(2002)Photosensitised decomposition of oxime oxalate amides is a useful new route to carbamoyl radicals that may cyclise to afford β- or γ-lactams. -
Transition metal complexes of triphosphorus macrocycles: A new class of homogeneous olefin polymerisation catalysts.
(2002)Some early transition metal (Ti, V, Cr) complexes of the triphosphorus macrocycle 1,5,9-triethyl-1,5,9-triphosphacyclododecane, [12]aneP3Et3, and related derivatives [12]aneP3R3 (R = Ph, C3H6OMe) have been examined for ... -
Bidentate N-Heterocyclic carbene complexes of group 13 trihydrides and trihalides.
(2002)top Treatment of the potentially chelating bis-carbene, 1,2-ethylene-3,3′-di-tert-butyl-diimidazole-2,2′-diylidene, EtIBut, with [MH3(NMe3)], M = Al, Ga, In, in a 1 ∶ 1 or 1 ∶ 2 stoichiometery led to good yields of the ... -
Manganese and Rhenium triphosphorus macrocycle complexes and reactions with alkenes.
(2002)The synthesis of Re(III), Re(I) and Mn(I) compounds of the macrocyclic phosphine ligand 1,5,9-trialkyl-1,5,9-triphosphacyclododecane, 12[ane]P3R3 (R = Et, iBu) is described. The reaction of 12[ane]P3R3 with ReCl3(PPh3)2(CH3CN) ... -
The reactivity of diazabutadienes towards low oxidation state group 13 iodides and the synthesis of a new gallium(I) carbene analogue
(2002)The reactions of two diazabutadiene ligands, Ar-DAB [(ArN[double bond, length as m-dash]CH)2 , Ar = 2,6-Pri2C6H3] and But-DAB [(ButN[double bond, length as m-dash]CH)2] with either GaI or an AlI3/Al mixture have afforded ... -
Two-dimensional material inks.
(2002)The development of new and more accurate fabrication technologies has, in the past few years, boosted interest in advanced device manufacturing. 2D materials, thanks to their diverse properties and dispersibility in liquid ... -
Low valent carbonylvanadium complexes of the triphosphorus macrocycle 12[ane]P3Et3.
(2003)The triphosphorus macrocycle 1,5,9-triethyl-1,5,9-triphosphacyclododecane, 12[ane]P3Et3, reacts with [V(CO)6]− under photolytic conditions to produce fac-[(12[ane]P3Et3)V(CO)3]− (1) which has been isolated as its Et4N salt. ... -
Spectroscopic characterization of chemically modified porous silicon
(SPIE, 2003)The discovery of room temperature photoluminescence in porous silicon has opened up a range of applications for this material in new areas such as optical, photodetector, photovoltaic, micromachine and sensors. For this ... -
Fast quantification of water in single living cells by near-infrared microscopy
(Royal Society of Chemistry, 2004)We have set up a near-infrared microscope using a tuneable diode laser in the range from 1530 to 1570 nm. This spectral range is close to the peak of the water overtone absorption. We used this new microscope to study ... -
Preparation of b- and g-lactams from carbamoyl radicals derived from oxime oxalate amides.
(2004)A general synthetic route to oxime oxalate amides was developed and applied to the preparation of molecules incorporating N -benzyl- N -alkenyl amides linked with acetone oxime or benzaldoxime units. In addition, 2 ... -
Formal encapsulation of [Fe(H2O)6]3+ by dinuclear {Fe2(hpdta)} units leads to a nonanuclear S = 13/2 Fe(III) oxo-cluster showing magnetic hysteresis
(2005)Under solvothermal conditions the unprecedented nonanuclear Fe(III) aggregate [Fe9(mu3-O)4(mu-OH)4(hpdta)4]5- is formed through the formal encapsulation of [Fe(H2O)6]3+ by four [Fe2(hpdta)(H2O)2]+ units: the aggregates ... -
Hierarchical supramolecular fullerene architectures with controlled dimensionality
(2005)Self-assembly of a fullerene derivative with long alkyl chains in different solvents results in the formation of hierarchically- ordered supramolecular assemblies with well-defined 1, 2 and 3Darchitecturessuchasvesicle s, ...