Leonard Lindoy - Academia.edu (original) (raw)
Papers by Leonard Lindoy
J Chem Soc Dalton Trans, 1991
Acta Crystallogr E Struct Rep, 2004
ABSTRACT In the crystalline state, the two pyridyl groups of the centrosymmetric title molecule,... more ABSTRACT In the crystalline state, the two pyridyl groups of the centrosymmetric title molecule, C12H10Cl2N2, are coplanar, with the N atoms trans to each other and with the Cl atoms of the chloromethyl groups protruding on opposite sides of the bipyridyl plane. In the crystal structure, the molecules are arranged in discrete layers propagated by edge-to-face and offset face-to-face aryl–aryl interactions. The interlayer spaces are occupied by chloromethyl groups.
Bioconjugate Chemistry, 2009
The 64 Cu complexes of a series of mono-, bis-, and tris-tetraazamacrocycles have been prepared, ... more The 64 Cu complexes of a series of mono-, bis-, and tris-tetraazamacrocycles have been prepared, and their stability in human sera has been assessed. The ligands forming the most stable Cu 2+ complexes were then conjugated to the B72.3 antibody (mAb). Conditions for conjugation of the ligands to the mAb were optimized for the concentration of protein, ligand, pH, temperature, and time. The optimum moles of Cu 2+ attached to the mAb were as high as 3.5 for L2 and 5.5 or 2.7 for L5, and the immunoreactivity was g80%. Biodistribution of the radioimmunoconjugates showed good tumor localization and target-to-background ratios that were significantly enhanced compared to those achieved with monotetraazamacrocyclic derivatives.
J Chem Soc Dalton Trans, 1987
ABSTRACT
Journal of the American Chemical Society, 1985
The hydration of coordinated carboxyalkenes has been studied by using bis( 1,2-ethanediamine)coba... more The hydration of coordinated carboxyalkenes has been studied by using bis( 1,2-ethanediamine)cobalt(III) complexes with either methyl maleate or ethyl fumarate coordinated cis to an aqua molecule. Upon removal of a proton from the aqua ligand (pK, 7.14) under pH-stat conditions, the [Co(en),(OH)(methylmaleato)]+ ion undergoes a rapid intramolecular cyclization reaction ( k = 3.4 X s-I at pH 8.05, 25 "C, /I = 1.0 M NaC10,) to produce cis-[Co(en),(OH)(methylfumarato)]+ and two diastereoisomers of the [Co(en),(methylmalato)]+ ion. The intramolecular nature of the cyclization reaction and the exclusive formation of five-membered rings in the chelated malate product have been established by "0-tracer experiments and a three-dimensional X-ray crystallographic analysis of one of the diastereoisomers (crystal data: C9H2,Br2CoN,0,, space group
Faculty of Science and Technology, 2006
J Am Chem Soc, 1980
The (p-nitrophenylphosphato)pentaamminecobalt(III) cation (CoNPP) undergoes base hydrolysis to ge... more The (p-nitrophenylphosphato)pentaamminecobalt(III) cation (CoNPP) undergoes base hydrolysis to generate p-nitrophenolate ion (NP), p-nitrophenylphosphate ion (NPP), and hydroxo(phosphoramido)tetraamminecobalt(III) with a rate law of the form -d(CoNPP)/dt = k[CoNPP][OH-] (p = 1.0 M, NaCIO.,; 25 "C) where k = 8.1 X lo4 M-I s-I ( k is a composite rate constant for p-nitrophenol and p-nitrophenylphosphate production divided approximately equally between the two pathways) in the hydroxide range 0.05-1.0 M. The ester hydrolysis is accelerated at least 10x-fold relative to uncoordinated p-nitrophenylphosphate in the presence of OH-(1 M) and NH3 (1 M). Product distribution, I8O tracer, and 31P NMR studies imply the participation of a five-coordinate aminophosphorane, generated by intramolecular attack of a deprotonated, coordinated ammonia at the phosphorus center. Both hydroxo(phosphoramido)tetraamminecobalt(III) and p-nitrophenolate are produced by this route. A competing conventional base-catalyzed SNlcB mechanism for Co-0 bond rupture accounts for the released p-nitrophenylphosphate. The intermediate hydroxo(phosphoramido)tetraammine complex is hydrolyzed slowly by base to liberate phosphoramidate anion by the same mechanism. The ester hydrolysis represents a rapid phosphoryl group transfer from oxygen to nitrogen, and it may model some aspects of amino transferase chemistry. (8) Armitage, I. M.; Schoot Uiterkamp, A. J. M.; Chlebowski, J. F.; (9) Otvos, J. 0.; Alger, J. R.; Coleman, J. E.; Armitage, I. M. J . Biol. Coleman, J. E. J. Magn. Reson. 1978, 29, 375-392. Chem. 1979, 254, 1178-1 180 and references therein.
Dalton transactions (Cambridge, England : 2003), 2015
The hetero-metal complexes [Co(II)(Fctpy)2]X2 (Fctpy = 4'-ferrocenyl-2,2';6'2'... more The hetero-metal complexes [Co(II)(Fctpy)2]X2 (Fctpy = 4'-ferrocenyl-2,2';6'2''-terpyridine, X = PF6 (), BF4 (), ClO4 (), BPh4 ()) were prepared and their structures and properties were investigated by single crystal X-ray structural analysis, cyclic voltammetry, Mössbauer spectroscopy, UV-vis spectroscopy measurements and DFT calculations. These compounds show reversible redox behaviour in the solid state and switching of the colour between red-violet and blue in response to the change of the oxidation state of the cobalt ion centres. [Co(II)(Fctpy)2](PF6)2 () and [Co(III)(Fctpy)2](PF6)3 () were isolated as the red and blue crystalline products, and the crystal structures were determined. From the results of UV-vis spectroscopy and the DFT calculations, we assigned the respective colours as resulting from MLCT involving the ferrocenyl substituents, with the shift in the wavelength of the MLCT reflecting the respective HOMO/LUMO stabilizations induced by the chan...
ChemInform
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was e... more ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Journal of the Chemical Society, Dalton Transactions, 1991
ABSTRACT
Journal of the Chemical Society, Dalton Transactions, 1990
ABSTRACT
Journal of the Chemical Society, Dalton Transactions, 1996
... Philip J. Baillie,**" Nick Choi," Leonard F. Lindoy,b Mary ... more ... Philip J. Baillie,**" Nick Choi," Leonard F. Lindoy,b Mary McPartlin," Harold R. Powell" and Peter A. Tasker *?' ... 2 KR Adam, BJ McCool, AJ Leong, L. F. Lindoy, CWG Ansell, PJ Baillie, KP Dancey, LA Drummond, K. Henrick, M. McPartlin, DK Uppal and PA Tasker, J. Chem. ...
Journal of the Chemical Society, Dalton Transactions, 1991
ABSTRACT
Journal of the Chemical Society, Dalton Transactions, 1987
ABSTRACT
Journal of the Chemical Society, Dalton Transactions, 1996
The effect of macrocyclic and chelate-ring size on the complexation behaviour of a series of dibe... more The effect of macrocyclic and chelate-ring size on the complexation behaviour of a series of dibenzo tetraaza macrocycles incorporating 14-to 17-membered inner rings has been investigated. Change in ring size along this 'lop-sided%'series has been achieved solely by varying the number of methylene carbons that link adjacent benzyl nitrogen atoms. Several solid complexes of type NiLX 2· xH 2 O (L= macrocyclic ligand; x= 0 or 1; X= Cl, NCS or NO 3) with these rings have been isolated. The results of five X-ray crystallographic analyses, ...
Polyhedron, 2015
Dedicated to Catherine Housecroft on the occasion of her 60th birthday.
Journal of the Chemical Society, Dalton Transactions, 1991
ABSTRACT
Journal of the Chemical Society, Dalton Transactions, 1990
ABSTRACT
Zeitschrift für anorganische und allgemeine Chemie, 2004
Page 1. Anion Controlled Supramolecular Self-Assembly of Tetraprotonated Tris[2-(benzylamino)ethy... more Page 1. Anion Controlled Supramolecular Self-Assembly of Tetraprotonated Tris[2-(benzylamino)ethyl]amine Bianca Antoniolia, Kerstin Gloea, Karsten Gloea,*, Gudrun Goretzkia, Manuela Grotjahna, Holger Heßkea, Matthias ...
J Chem Soc Dalton Trans, 1991
Acta Crystallogr E Struct Rep, 2004
ABSTRACT In the crystalline state, the two pyridyl groups of the centrosymmetric title molecule,... more ABSTRACT In the crystalline state, the two pyridyl groups of the centrosymmetric title molecule, C12H10Cl2N2, are coplanar, with the N atoms trans to each other and with the Cl atoms of the chloromethyl groups protruding on opposite sides of the bipyridyl plane. In the crystal structure, the molecules are arranged in discrete layers propagated by edge-to-face and offset face-to-face aryl–aryl interactions. The interlayer spaces are occupied by chloromethyl groups.
Bioconjugate Chemistry, 2009
The 64 Cu complexes of a series of mono-, bis-, and tris-tetraazamacrocycles have been prepared, ... more The 64 Cu complexes of a series of mono-, bis-, and tris-tetraazamacrocycles have been prepared, and their stability in human sera has been assessed. The ligands forming the most stable Cu 2+ complexes were then conjugated to the B72.3 antibody (mAb). Conditions for conjugation of the ligands to the mAb were optimized for the concentration of protein, ligand, pH, temperature, and time. The optimum moles of Cu 2+ attached to the mAb were as high as 3.5 for L2 and 5.5 or 2.7 for L5, and the immunoreactivity was g80%. Biodistribution of the radioimmunoconjugates showed good tumor localization and target-to-background ratios that were significantly enhanced compared to those achieved with monotetraazamacrocyclic derivatives.
J Chem Soc Dalton Trans, 1987
ABSTRACT
Journal of the American Chemical Society, 1985
The hydration of coordinated carboxyalkenes has been studied by using bis( 1,2-ethanediamine)coba... more The hydration of coordinated carboxyalkenes has been studied by using bis( 1,2-ethanediamine)cobalt(III) complexes with either methyl maleate or ethyl fumarate coordinated cis to an aqua molecule. Upon removal of a proton from the aqua ligand (pK, 7.14) under pH-stat conditions, the [Co(en),(OH)(methylmaleato)]+ ion undergoes a rapid intramolecular cyclization reaction ( k = 3.4 X s-I at pH 8.05, 25 "C, /I = 1.0 M NaC10,) to produce cis-[Co(en),(OH)(methylfumarato)]+ and two diastereoisomers of the [Co(en),(methylmalato)]+ ion. The intramolecular nature of the cyclization reaction and the exclusive formation of five-membered rings in the chelated malate product have been established by "0-tracer experiments and a three-dimensional X-ray crystallographic analysis of one of the diastereoisomers (crystal data: C9H2,Br2CoN,0,, space group
Faculty of Science and Technology, 2006
J Am Chem Soc, 1980
The (p-nitrophenylphosphato)pentaamminecobalt(III) cation (CoNPP) undergoes base hydrolysis to ge... more The (p-nitrophenylphosphato)pentaamminecobalt(III) cation (CoNPP) undergoes base hydrolysis to generate p-nitrophenolate ion (NP), p-nitrophenylphosphate ion (NPP), and hydroxo(phosphoramido)tetraamminecobalt(III) with a rate law of the form -d(CoNPP)/dt = k[CoNPP][OH-] (p = 1.0 M, NaCIO.,; 25 "C) where k = 8.1 X lo4 M-I s-I ( k is a composite rate constant for p-nitrophenol and p-nitrophenylphosphate production divided approximately equally between the two pathways) in the hydroxide range 0.05-1.0 M. The ester hydrolysis is accelerated at least 10x-fold relative to uncoordinated p-nitrophenylphosphate in the presence of OH-(1 M) and NH3 (1 M). Product distribution, I8O tracer, and 31P NMR studies imply the participation of a five-coordinate aminophosphorane, generated by intramolecular attack of a deprotonated, coordinated ammonia at the phosphorus center. Both hydroxo(phosphoramido)tetraamminecobalt(III) and p-nitrophenolate are produced by this route. A competing conventional base-catalyzed SNlcB mechanism for Co-0 bond rupture accounts for the released p-nitrophenylphosphate. The intermediate hydroxo(phosphoramido)tetraammine complex is hydrolyzed slowly by base to liberate phosphoramidate anion by the same mechanism. The ester hydrolysis represents a rapid phosphoryl group transfer from oxygen to nitrogen, and it may model some aspects of amino transferase chemistry. (8) Armitage, I. M.; Schoot Uiterkamp, A. J. M.; Chlebowski, J. F.; (9) Otvos, J. 0.; Alger, J. R.; Coleman, J. E.; Armitage, I. M. J . Biol. Coleman, J. E. J. Magn. Reson. 1978, 29, 375-392. Chem. 1979, 254, 1178-1 180 and references therein.
Dalton transactions (Cambridge, England : 2003), 2015
The hetero-metal complexes [Co(II)(Fctpy)2]X2 (Fctpy = 4'-ferrocenyl-2,2';6'2'... more The hetero-metal complexes [Co(II)(Fctpy)2]X2 (Fctpy = 4'-ferrocenyl-2,2';6'2''-terpyridine, X = PF6 (), BF4 (), ClO4 (), BPh4 ()) were prepared and their structures and properties were investigated by single crystal X-ray structural analysis, cyclic voltammetry, Mössbauer spectroscopy, UV-vis spectroscopy measurements and DFT calculations. These compounds show reversible redox behaviour in the solid state and switching of the colour between red-violet and blue in response to the change of the oxidation state of the cobalt ion centres. [Co(II)(Fctpy)2](PF6)2 () and [Co(III)(Fctpy)2](PF6)3 () were isolated as the red and blue crystalline products, and the crystal structures were determined. From the results of UV-vis spectroscopy and the DFT calculations, we assigned the respective colours as resulting from MLCT involving the ferrocenyl substituents, with the shift in the wavelength of the MLCT reflecting the respective HOMO/LUMO stabilizations induced by the chan...
ChemInform
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was e... more ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Journal of the Chemical Society, Dalton Transactions, 1991
ABSTRACT
Journal of the Chemical Society, Dalton Transactions, 1990
ABSTRACT
Journal of the Chemical Society, Dalton Transactions, 1996
... Philip J. Baillie,**" Nick Choi," Leonard F. Lindoy,b Mary ... more ... Philip J. Baillie,**" Nick Choi," Leonard F. Lindoy,b Mary McPartlin," Harold R. Powell" and Peter A. Tasker *?' ... 2 KR Adam, BJ McCool, AJ Leong, L. F. Lindoy, CWG Ansell, PJ Baillie, KP Dancey, LA Drummond, K. Henrick, M. McPartlin, DK Uppal and PA Tasker, J. Chem. ...
Journal of the Chemical Society, Dalton Transactions, 1991
ABSTRACT
Journal of the Chemical Society, Dalton Transactions, 1987
ABSTRACT
Journal of the Chemical Society, Dalton Transactions, 1996
The effect of macrocyclic and chelate-ring size on the complexation behaviour of a series of dibe... more The effect of macrocyclic and chelate-ring size on the complexation behaviour of a series of dibenzo tetraaza macrocycles incorporating 14-to 17-membered inner rings has been investigated. Change in ring size along this 'lop-sided%'series has been achieved solely by varying the number of methylene carbons that link adjacent benzyl nitrogen atoms. Several solid complexes of type NiLX 2· xH 2 O (L= macrocyclic ligand; x= 0 or 1; X= Cl, NCS or NO 3) with these rings have been isolated. The results of five X-ray crystallographic analyses, ...
Polyhedron, 2015
Dedicated to Catherine Housecroft on the occasion of her 60th birthday.
Journal of the Chemical Society, Dalton Transactions, 1991
ABSTRACT
Journal of the Chemical Society, Dalton Transactions, 1990
ABSTRACT
Zeitschrift für anorganische und allgemeine Chemie, 2004
Page 1. Anion Controlled Supramolecular Self-Assembly of Tetraprotonated Tris[2-(benzylamino)ethy... more Page 1. Anion Controlled Supramolecular Self-Assembly of Tetraprotonated Tris[2-(benzylamino)ethyl]amine Bianca Antoniolia, Kerstin Gloea, Karsten Gloea,*, Gudrun Goretzkia, Manuela Grotjahna, Holger Heßkea, Matthias ...