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Displaying Results 1 - 25 of 1557 on page 1 of 63
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'Robust Self-Assembled Monolayers of Ru(II) and Os(II) Polypyridines on Gold Surfaces: Exploring New Potentials'
(2009)
MURPHY, FRANCES; DRAPER, SYLVIA
'Robust Self-Assembled Monolayers of Ru(II) and Os(II) Polypyridines on Gold Surfaces: Exploring New Potentials'
(2009)
MURPHY, FRANCES; DRAPER, SYLVIA
Abstract:
Metal complexes [M(phtpy)(pztpy)](PF6)2 (phtpy = 4'-phenyl-2,2':6',2"-terpyridine, pztpy = 4'-(Npiperazinyl)- 2,2':6',2"-terpyridine, M = Ru, Os) were prepared and examined spectroscopically and electrochemically. The piperazine attachment was found to significantly modify the photophysical and electrochemical properties compared to the parent bis-terpyridine complexes, causing a red-shift of the 1MLCT (23 nm) and a substantial cathodic shift of the redox potential (0.30 V for Ru, 0.23 V for Os). Self-assembled monolayers (SAMs) of the complexes on polished gold electrodes were generated simply via the in situ formation of a dithiocarbamate (DTC) anchoring group at the terminal piperazinyl nitrogen on the pztpy ligand. Cyclic voltammetry revealed that the monolayers show excellent reversible behaviour and exceptional stability. The high stability of the SAMs is attributed to the strong bidentate attachment to the gold surface of the DTC tether...
http://hdl.handle.net/2262/39279
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"GaI": A versatile reagent for the synthetic chemist.
(2005)
BAKER, ROBERT
"GaI": A versatile reagent for the synthetic chemist.
(2005)
BAKER, ROBERT
Abstract:
The current renaissance in main group chemistry has been fuelled by the remarkable array of fundamentally interesting yet synthetically applicable low oxidation state p-block compounds that have appeared over the last decade. Their syntheses generally require the ready availability of low oxidation state element halide precursors. In the case of gallium this is provided by the simple to prepare reagent, ?GaI?, which since it was first reported in 1990, has been utilised in areas as varied as organic synthesis and gallium cluster construction. This article tracks the history of this extraordinary material and highlights its synthetic diversity; hopefully allowing the reader to envisage its application to aspects of their own research fields.
http://hdl.handle.net/2262/69572
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(1,3-Butadiynyl-C¹)(η⁵-cyclopentadienyl)(triphenylphosphine-P)nickel(II)
(1998)
Gallagher, John F.; Butler, Peter; Manning, Anthony R.
(1,3-Butadiynyl-C¹)(η⁵-cyclopentadienyl)(triphenylphosphine-P)nickel(II)
(1998)
Gallagher, John F.; Butler, Peter; Manning, Anthony R.
Abstract:
The title compound, [Ni(Cp)(PPh₃)(C≡C-C≡C-H)] or [Ni(C₄H)(C₅H₅)(C₁₈H₁₅P)], has metal-ligand dimensions of Ni--P 2.1410(4), Ni--C 1.8383 (15)Å and P--Ni--C 93.47 (5)°, and principal oalkyne dimensions of C≡C 1.212(2) and 1.187(3)Å, and C≡C-C 177.94(19) and 179.5(2)°. Intra- and intermolecular C--H...C≡C interactions are present with the shortest C...C distance being 3.198 Å.
http://doras.dcu.ie/290/
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(1'-Benzoylferrocenyl)diphenylmethanol; a Centrosymmetric R⁴₄(16) Dimer Generated by C-H...O Hydrogen Bonding
(1997)
Glidewell, Christopher; Ahmed, S. Zaka; Gallagher, John F.; Ferguson, George
(1'-Benzoylferrocenyl)diphenylmethanol; a Centrosymmetric R⁴₄(16) Dimer Generated by C-H...O Hydrogen Bonding
(1997)
Glidewell, Christopher; Ahmed, S. Zaka; Gallagher, John F.; Ferguson, George
Abstract:
In (1'-benzoylferrocenyl)diphenylmethanol, [(PhCOC₅H₄)Fe(C₅H₄)]CPh₂OH, (C₃₀H₂₄FeO₂), there is an intramolecular O-H...O hydrogen bond with O...O 2.891 (2) Å: the ferrocenyl unit adopts an eclipsed conformation and the molecules are linked into centrosymmetric dimers by C-H...O hydrogen bonds with C...O 3.357 (3) Å, to generate a cyclic R⁴₄(16) motif.
http://doras.dcu.ie/567/
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(1RS,2SR,7RS,8RS)-N-Benzoyltricyclo[6.2.2.0²,⁷]dodeca-9,11-diene-1,10-dicarboximide
(2005)
McSweeney, Nigel; Pratt, Albert C.; Long, Conor; Howie, R. Alan
(1RS,2SR,7RS,8RS)-N-Benzoyltricyclo[6.2.2.0²,⁷]dodeca-9,11-diene-1,10-dicarboximide
(2005)
McSweeney, Nigel; Pratt, Albert C.; Long, Conor; Howie, R. Alan
Abstract:
The title 1,4-photoadduct, C₂₁H₁₉NO₃, was formed on irradiation of N-benzoylphthalimide in dichloromethane containing cyclohexene. The bond lengths and angles are generally within the normal ranges. A notable feature of the molecule is the presence within it of four contiguous chiral centres.
http://doras.dcu.ie/116/
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(2RS)-3-(4-Hydroxyphenyl)-2-(1-oxo-1H-2,3-dihydroisoindol-2-yl)propanoic acid monohydrate
(2007)
Gallagher, John F.; Brady, Fiona
(2RS)-3-(4-Hydroxyphenyl)-2-(1-oxo-1H-2,3-dihydroisoindol-2-yl)propanoic acid monohydrate
(2007)
Gallagher, John F.; Brady, Fiona
Abstract:
The title compound, C₁₇H₁₅NO₄·H₂O, derived from DL-tyrosine crystallizes as an unusual hydrogen-bonded acid-monohydrate dimer. The asymmetric unit contains two organic molecules and two water molecules. Dimers link through (aryl)O-H...O=C hydrogen bonds along the [101] direction, forming a one-dimensional chain of rings, and further associated via inversion centres (forming a chain of rings aligned in the opposite direction) generating columns. Ruffled sheets arise from interlocking of isoindole rings via π-π(arene) stacking and C-H...π(arene) interactions; C-H...O interactions generate a three-dimensional network.
http://doras.dcu.ie/304/
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(2S)-4-Methyl-2-(1-oxo-1H-2,3-dihydroisoindol- 2-yl)pentanoic acid.
(2006)
Brady, Fiona; Gallagher, John F.
(2S)-4-Methyl-2-(1-oxo-1H-2,3-dihydroisoindol- 2-yl)pentanoic acid.
(2006)
Brady, Fiona; Gallagher, John F.
Abstract:
The title compound, C14H17NO3, exhibits carboxylic acid group disorder about the C—CO2 axis, with site occupancies of 0.79 (5):0.21 (5). Molecules are linked by intermolecular O—H O Ciso, C—H O Ciso and C—H (arene) interactions (iso = isoindolinone).
http://doras.dcu.ie/25/
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(S)-N-(1-Benzyl-2-hydroxyethyl)phthalamic acid
(2005)
McCormac, Paul B.; Pratt, Albert C.; Long, Conor; Howie, R. Alan
(S)-N-(1-Benzyl-2-hydroxyethyl)phthalamic acid
(2005)
McCormac, Paul B.; Pratt, Albert C.; Long, Conor; Howie, R. Alan
Abstract:
A feature of the structure of the title compound, C₁₇H₁₇NO₄, is the three-dimensional connectivity generated by intermolecular hydrogen bonds.
http://doras.dcu.ie/84/
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(η5-Cyclopentadienyl)(2-naphthylethynyl)(triphenylphosphine-κP)nickel(II)
(2007)
Butler, Peter; Gallagher, John F.; Lough, Alan J.; Manning, Anthony R.
(η5-Cyclopentadienyl)(2-naphthylethynyl)(triphenylphosphine-κP)nickel(II)
(2007)
Butler, Peter; Gallagher, John F.; Lough, Alan J.; Manning, Anthony R.
Abstract:
The title compound, [Ni(C₅H₅)(C₁₂H₇)(C₁₈H₁₅P)], does not contain strong hydrogen-bond donors or acceptors and the primary interactions are limited to those of the weak C-H...π(arene) type and mainly involving the arene rings.
http://doras.dcu.ie/305/
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[5,15-Bis(2-methyl-prop-yl)porphyrinato]nickel(II).
(2012)
SENGE, MATHIAS
[5,15-Bis(2-methyl-prop-yl)porphyrinato]nickel(II).
(2012)
SENGE, MATHIAS
Abstract:
The title compound, [Ni(C28H28N4)], crystallizes with two independent molecules in the unit cell, one of which is located on an inversion center. Both macrocycles exhibit a planar conformation with average deviation from the least-squaresplane of the 24 macrocycle atoms of 24 = 0.043 A ? for the first molecule and 0.026 A ? for the molecule located on an inversion center. The average Ni?N bond lengths are 1.955 (2) and 1.956 (2) A ? in the two molecules. The molecules form ? dimers of intermediary strength with a mean plane separation of 3.36 (2) A
http://hdl.handle.net/2262/67520
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[Ru-POM] Photo-electrocatalysis
(2011)
Zhu, Jie
[Ru-POM] Photo-electrocatalysis
(2011)
Zhu, Jie
Abstract:
In the past years, photo-sensitation of polyoxometalate anions with Ruthenium polypyridyl cations has received intensive investigation as the excellent photoluminescence properties and stability of Ruthenium polypyridyl complexes in multiple redox states can be coupled to the POM in order to extend the absorbance crosssection of the resulting complex into the visible region. In this thesis, remediation of organic solvent, such as benzyl alcohol and toluene, and a number of key processes that influence the overall output from photocatalytic thin films were optimized. These steps included; (1) the extent to which the catalyst and sensitizer interact electronically, (2) the film structure since this can influence the substrate access to the catalytic centres and (3) their rate of regeneration. Thin layers of an electrostatically associated adduct formed between the polyoxomolybdate, and the ruthenium polypyridyl complex or metallopolymers have been deposited onto electrodes using alter...
http://doras.dcu.ie/16607/
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{4,6-Bis[(E)-1-methyl-2-(pyridin-2-yl-methyl-idene-κN)hydrazinyl-κN]pyrimidine-κN}dichloridocopper(II) methanol disolvate monohydrate
(2011)
MCCABE, THOMAS; MARZEC, BARTOSZ; SCHMITT, WOLFGANG
{4,6-Bis[(E)-1-methyl-2-(pyridin-2-yl-methyl-idene-κN)hydrazinyl-κN]pyrimidine-κN}dichloridocopper(II) methanol disolvate monohydrate
(2011)
MCCABE, THOMAS; MARZEC, BARTOSZ; SCHMITT, WOLFGANG
Abstract:
The title compound, [CuCl2(C18H18N8)]?2CH3OH?H2O, contains a pentacoordinated Cu(II) atom bonded to the tridentate 4,6-bis[(E)-1-methyl-2-(pyridin-2-ylmethylidene)hydrazinyl]pyrimidine ligand and two Cl atoms. The geometry around the CuII atom is distorted square-pyramidal. The molecules pack in the crystal structure via O-HCl, O-HN, C-HCl and C-HO hydrogen bonds, C-H and - interactions [centroid-centroid distances of the pyrimidine-pyridine and pyridine-pyridine interactions are 3.750 (3) and 3.850 (3) ?, respectively], forming sheet-like assemblies.
http://hdl.handle.net/2262/60824
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1-Ferrocenylmethyl-2-phenyl-1H-1,3-benzimidazole
(2007)
Gallagher, John F.; Hanlon, Keith; Howarth, Joshua
1-Ferrocenylmethyl-2-phenyl-1H-1,3-benzimidazole
(2007)
Gallagher, John F.; Hanlon, Keith; Howarth, Joshua
Abstract:
In the title molecule, [Fe(C5H5)(C19H15N2)], the five-membered C3N2 imidazole ring forms dihedral angles of 84.71 (13) and 52.12 (11)°, respectively, with the substituted cyclopentadienyl and phenyl rings. In the crystal structure, in addition to a weak C-H...N interaction, there is a modest C-H...[pi](ring) interaction involving a C-H group of the unsubstituted cyclopentadienyl ring and the imidazole ring.
http://doras.dcu.ie/104/
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1,1′-Fc(4-C6H4CO2Et)2and its unusual salt derivative withZ′ = 5,catena-[Na+]2[1,1′-Fc(4-C6H4CO2−)2]·0.6H2O [1,1′-Fc = (η5-(C5H4)2Fe]
(2010)
Gallagher, John F.; Alley, Steven; Brosnan, Marianne; Lough, Alan J.
1,1′-Fc(4-C6H4CO2Et)2and its unusual salt derivative withZ′ = 5,catena-[Na+]2[1,1′-Fc(4-C6H4CO2−)2]·0.6H2O [1,1′-Fc = (η5-(C5H4)2Fe]
(2010)
Gallagher, John F.; Alley, Steven; Brosnan, Marianne; Lough, Alan J.
Abstract:
The neutral diethyl 4,4'-(ferrocene-1,1'-diyl)dibenzoate, Fe[[eta]5-(C5H4)(4-C6H4CO2Et)]2 (I), yields (II) (following base hydrolysis) as the unusual complex salt poly[disodium bis[diethyl 4,4'-(ferrocene-1,1'-diyl)dibenzoate] 0.6-hydrate] or [Na+]2[Fe{[eta]5-(C5H4)-4-C6H4CO_2^-}2]·0.6H2O with Z' = 5. Compound (I) crystallizes in the triclinic system, space group P\bar 1, with two molecules having similar geometry in the asymmetric unit (Z' = 2). The salt complex (II) crystallizes in the orthorhombic system, space group Pbca, with the asymmetric unit comprising poly[decasodium pentakis[diethyl 4,4'-(ferrocene-1,1'-diyl)dibenzoate] trihydrate] or [Na+]10[Fe{[eta]5-(C5H4)-4-C6H4CO_2^-}2]5·3H2O. The five independent 1,1'-Fc[(4-C6H4CO2)-]2 dianions stack in an offset ladder (stepped) arrangement with the ten benzoates mutually oriented cisoid towards and bonded to a central layer comprising the ten Na+ ions and three water molecules [1,1'...
http://doras.dcu.ie/15328/
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1,4-Bis[2-(6-bromohexyl)-2H-tetrazol-5-yl]benzene
(2004)
Fleming, Adrienne F. M.; Kelleher, Fintan; Mahon, Mary F.; McGinley, John; Molloy, Kier...
1,4-Bis[2-(6-bromohexyl)-2H-tetrazol-5-yl]benzene
(2004)
Fleming, Adrienne F. M.; Kelleher, Fintan; Mahon, Mary F.; McGinley, John; Molloy, Kieran C.; Prajapati, Vipa
Abstract:
The 150 K structure of the title compound, C20H28Br2N8, has been shown to exhibit liquid-crystal alignment in the gross array, enhanced by the presence of intermolecular Br Br interactions. The asymmetric unit consists of one-half of a molecule, the remainder being generated via a crystallographic inversion centre located at the centre of the benzene ring.
http://mural.maynoothuniversity.ie/364/
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2-(3-Chlorophenyl)-1-ferrocenylmethyl-1H-1,3-benzimidazole: an electroactive agent for anion sensor and malarial parasite studies
(2001)
Gallagher, John F.; Hanlon, Keith; Howarth, Joshua; Thomas, Jean-Luc
2-(3-Chlorophenyl)-1-ferrocenylmethyl-1H-1,3-benzimidazole: an electroactive agent for anion sensor and malarial parasite studies
(2001)
Gallagher, John F.; Hanlon, Keith; Howarth, Joshua; Thomas, Jean-Luc
Abstract:
The title compound, [Fe(C₅H₅)(C₁₉H₁₄ClN₂)], a model electroactive agent for anion sensor and malarial parasite studies, has Fe-C bond lengths in the range 2.020 (3)-2.0543 (18) Å. The Fe...Cg distances (Cg indicates a ring centroid) are essentially similar, with values of 1.6467 (10) and 1.6487 (11) Å for the substituted and unsubstituted cyclopentadienyl rings, respectively, with a linear Cg...Fe...Cg angle of 179.12 (7)°. The Fe-CCp-Csp³ angle is 128.43 (13)° and the Fe1-CCp-Csp³-NBz torsion angle 110.27 (17)° (Cp is cyclopentadienyl and Bz is benzimidazole). Weak C-H...Cl contacts form the only intermolecular interactions of significance.
http://doras.dcu.ie/156/
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2-(3,5-Dimethylbenzene)-1-ferrocenylmethyl-1H-1,3-benzimidazole
(2007)
Gallagher, John F.; Hanlon, Keith; Howarth, Joshua
2-(3,5-Dimethylbenzene)-1-ferrocenylmethyl-1H-1,3-benzimidazole
(2007)
Gallagher, John F.; Hanlon, Keith; Howarth, Joshua
Abstract:
In the title molecule, [Fe(C5H5)(C21H19N2)], the five-membered imidazole ring forms dihedral angles of 88.61 (8) and 42.15 (6)° with the substituted cyclopentadienyl and dimethyl-substituted benzene rings, respectively. In the crystal structure, there is an Nsp2...H contact and a modest C-H...[pi](arene) interaction involving the benzene ring of the benzimidizole system.
http://doras.dcu.ie/103/
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2-Benzoylspiro[1H-isoindole-1,3'-isochromene]-1',3,4'(2H,3'H)-trione
(2004)
McSweeney, Nigel; Pratt, Albert C.; Creaven, Bernadette; Long, Conor; Howie, R. Alan
2-Benzoylspiro[1H-isoindole-1,3'-isochromene]-1',3,4'(2H,3'H)-trione
(2004)
McSweeney, Nigel; Pratt, Albert C.; Creaven, Bernadette; Long, Conor; Howie, R. Alan
Abstract:
The title compound, C₂₃H₁₃NO₅, was isolated following irradiation of N-benzoylphthalimide in toluene. The bond lengths and angles are typical of a molecule of this kind, but the molecule itself is of some interest. The most challenging aspect of the refinement was to devise a model to cater for disorder in one part of the molecule.
http://doras.dcu.ie/114/
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2,2'-[2,3-Dihydro-2-(prop-2-enyl)-1H-isoindole-1,3-diylidene]bis(propanedinitrile)-tetrathiafulvalene (1/1), TCPI-TTF
(2002)
Crean, Colm; Gallagher, John F.; Pratt, Albert C.
2,2'-[2,3-Dihydro-2-(prop-2-enyl)-1H-isoindole-1,3-diylidene]bis(propanedinitrile)-tetrathiafulvalene (1/1), TCPI-TTF
(2002)
Crean, Colm; Gallagher, John F.; Pratt, Albert C.
Abstract:
The title complex, C17H9N5•C6H4S4, contains -deficient bis(dinitrile) and TTF molecules stacked alternately in columns along the a-axis direction; the interplanar angle between the TTF molecule and the isoindolinyl C4N[C(CN)2]2 moiety is 1.21 (4)°. The N-allyl moiety in the TCPI molecule is oriented at an angle of 87.10 (10)° with respect to the five-membered C4N ring, and the four C N bond lengths range from 1.134 (3) to 1.142 (3) Å, with C-C N angles in the range 174.3 (3)-176.9 (2)°. In the TTF system, the S-C bond lengths are 1.726 (3)-1.740 (3) and 1.751 (2)-1.763 (2) Å for the external S-C(H) and internal S-C(S) bonds, respectively.
http://doras.dcu.ie/22/
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2,2'-{2-[(E)-3-Phenylprop-2-enyl]-2,3-dihydro-1H-isoindol-1,3-diylidene}dimalononitrile, a π-deficient system for π...π (1:1) stacking investigations
(2001)
Crean, Colm; Gallagher, John F.; Pratt, Albert C.
2,2'-{2-[(E)-3-Phenylprop-2-enyl]-2,3-dihydro-1H-isoindol-1,3-diylidene}dimalononitrile, a π-deficient system for π...π (1:1) stacking investigations
(2001)
Crean, Colm; Gallagher, John F.; Pratt, Albert C.
Abstract:
The title compound, C₂₃H₁₃N₅, derived from cinnamyl alcohol and 2,2'-(isoindolin-1,3-diylidene)bispropanedinitrile, is a heterocyclic TCNQ analogue of interest as an electron-deficient component in charge-transfer complexes. A small perturbation of the four C-C≡N angles from linearity is observed, which are in the range 173.41 (18)-176.3 (2)°; the C≡N bond lengths are in the range 1.144 (2)-1.146 (2) Å. The terminal phenyl group is oriented at an angle of 77.17 (6)° to the C₄N ring and the C=C bond is short, 1.319 (2) Å. There are no classical hydrogen bonds, although intramolecular C-H...N and intermolecular C-H...π(arene) interactions influence the crystal-structure packing.
http://doras.dcu.ie/154/
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3-(Benzo[b]thien-2-yl)-5,6-dihydro-1,4,2-oxathiazine 4-Oxide
(1997)
Gallagher, John F.; Ferguson, George; Brouwer, Walter G.
3-(Benzo[b]thien-2-yl)-5,6-dihydro-1,4,2-oxathiazine 4-Oxide
(1997)
Gallagher, John F.; Ferguson, George; Brouwer, Walter G.
Abstract:
The title compound, C₁₁H₉NO₂S₂, is a potent material preservative and contains the 1,4,2-oxathiazine ring system in a half-chair conformation with the methylene C atoms 0.510 (3) and -0.367 (3) Å from the plane of the other four oxathiazine ring atoms.
http://doras.dcu.ie/565/
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3d fabrication by multi-photon polymerisation of stimuli-responsive soft structures with sub-200nm resolution
(2018)
Florea, Larisa; Delaney, Colm; Tudor, Alexandru; Diamond, Dermot; Higgins, Michael
3d fabrication by multi-photon polymerisation of stimuli-responsive soft structures with sub-200nm resolution
(2018)
Florea, Larisa; Delaney, Colm; Tudor, Alexandru; Diamond, Dermot; Higgins, Michael
http://doras.dcu.ie/22246/
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4',5',6',7'-Tetrachlorospiro[cyclohex-2-ene-1,2'-indan]-1',3'-dione
(2005)
McSweeney, Nigel; Pratt, Albert C.; Long, Conor; Howie, R. Alan
4',5',6',7'-Tetrachlorospiro[cyclohex-2-ene-1,2'-indan]-1',3'-dione
(2005)
McSweeney, Nigel; Pratt, Albert C.; Long, Conor; Howie, R. Alan
Abstract:
The title compound, C₁₄H₈Cl₄O₂, has been isolated following irradiation of a dichloromethane solution of N-acetyltetrachlorophthalimide and cyclohexene. The structure refinement is slightly compromised by the disorder over two positions of equal occupancy of a methylene groupβ to the spiro C atom.
http://doras.dcu.ie/117/
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5,15-Bis(4-pentyl-oxyphen-yl)porphyrin.
(2013)
SENGE, MATHIAS
5,15-Bis(4-pentyl-oxyphen-yl)porphyrin.
(2013)
SENGE, MATHIAS
Abstract:
In the title compound, C42H42N4O2, the complete molecule is generated by a crystallographic inversion centre. The porphyrin system exhibits a near planar macrocycle conformation with an average deviation from the least-squares plane of the 24 macrocycle atoms of 0.037 (5) A ? . The phenyl ipso C atoms are positioned above and below the porphyrin plane by 0.35 (1) A ? and the macrocycle shows evidence of in-plane rectangular elongation with N N separations of 3.032 (5) and 2.803 (5) A ? . Two intramolecular N?H N hydrogen bonds occur.
http://hdl.handle.net/2262/72251
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5',6-Dichloro-1',3',3'-trimethylspiro[2H-1-benzopyran-2,2'-indoline]
(2008)
Alhashimy, Nameer; Müller-Bunz, Helge; Schazmann, Benjamin; Diamond, Dermot
5',6-Dichloro-1',3',3'-trimethylspiro[2H-1-benzopyran-2,2'-indoline]
(2008)
Alhashimy, Nameer; Müller-Bunz, Helge; Schazmann, Benjamin; Diamond, Dermot
Abstract:
In the crystal structure of the title compound, C19H17Cl2NO, the indoline and benzopyran ring systems are approximately perpendicular to each other. The indoline ring is in an envelope conformation with the spiro C atom as the flap. The N atom of the indoline ring forms a pyramidal environment, the sum of the angles at this atom being 352.46°.
http://doras.dcu.ie/714/
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