Dimethylphosphinato and dimethylarsinato complexes of group 13 metals and their chemistry

Ioannou, Panayiotis V.

doi:10.1007/s00706-013-0935-5

Cited by 4 publications

(3 citation statements)

References 23 publications

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“…It is only for pH > 5 that the contribution of the deprotonated Cac À ion to the binding reaction becomes important. This interpretation differs from that advanced in a previous study, 19 where the formation of the 1 : 1 complex was rationalized assuming that the main process is the reaction of the Al 3+ ion with the deprotonated form of the ligand, Cac À .…”

Section: Speciation Of Aluminium Formscontrasting

confidence: 94%

“…17 Formation of Al(III)/Cac complex 18 and, more recently, the synthesis of complexes of the dimethylarsinate anion and metal ions of the XIII group (Al, Ga, In, Tl) has been reported. 19 However, to the best of our knowledge, systematic thermodynamic studies of the aluminium/cacodylic acid system in solution under different experimental conditions are still lacking. This work focuses on the study of the Al(III)/Cac system at different pH values to infer the nature and strength of the interaction between Al(III) and the ligand and to assess the possible use of cacodylate to provide Al(III) buffered solutions for biochemical studies at neutral pH.…”

Section: Introductionmentioning

confidence: 99%

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Stabilization of Al(iii) solutions by complexation with cacodylic acid: speciation and binding features

Lari

Lozano

Busto

et al. 2015

Phys. Chem. Chem. Phys.

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Aluminium ions are believed to play a role in a number of neurological and skeletal disorders in the human body. The study of the biological processes and molecular mechanisms that underlie these pathological disorders is rendered a difficult task due to the wide variety of complex species that result from the hydrolysis of Al(3+) ions. In addition, this ion displays a pronounced tendency to precipitate as a hydroxide, so certain complexing agents should be envisaged to stabilize Al(III) solutions in near physiological conditions. In this work, we show that the common buffer cacodylic acid (dimethylarsinic acid, HCac) interacts with Al(III) to give stable complexes, even at pH 7. After preliminary analyses of the speciation of the metal ion and also of the ligand, a systematic study of the formation of different Al/Cac complexes at different pH values has been conducted. UV-Vis titrations, mass spectrometry NMR measurements and DTF calculations were performed to enlighten the details of the speciation and stoichiometry of Al/Cac complexes. The results altogether show that Al/Cac dimer complexes prevail, but monomer and trimer forms are also present. Interestingly, it was found that cacodylate promotes the formation of such relatively simple complexes, even under conditions where the polymeric form, Al13O4(OH)24(7+), should predominate. The results obtained can help to shed some light into the reactivity of aluminium ions in biological environments.

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Section: Speciation Of Aluminium Formscontrasting

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Stabilization of Al(iii) solutions by complexation with cacodylic acid: speciation and binding features

Lari

Lozano

Busto

et al. 2015

Phys. Chem. Chem. Phys.

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“…Ga III shows beneficial biological activities36 and 2 may be of interest but the oxygen analogue of 1 , (Me 2 AsO 2 ) 3 Ga, shows toxicity to both cancer and normal cells 37…”

Section: Resultsmentioning

confidence: 99%

The Structure of Bis(dimethyldithioarsinato)gallium(III) Sulfide [(Me₂AsS₂)₂Ga]₂S·0.75H₂O: A Hydrolysis Product of (Me₂AsS₂)₃Ga that Contains a Bridging Sulfide and both Pendant and Bridging Dimethyldithioarsinato Ligands

Papatriantafyllopoulou

Nastopoulos

Ioannou

2014

Zeitschrift anorg allge chemie

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The complex (Me 2 AsS 2 ) 3 Ga (1) attracted water molecules that slowly and completely hydrolyzed it. The product was the dinuclear gallium compound (Me 2 AsS 2 ) 2 Ga-S-Ga(S 2 AsMe 2 ) 2 (2) as 2·0.75H 2 O, which was structurally characterized with X-ray crystallography (P2 1 2 1 2 1 , R 1 = 0.0321, wR 2 = 0.0622). Compound 2 shows * Prof. Dr. P. V. Ioannou E-Mail: ioannou@chemistry.upatras.gr [a] 1654 an approximate non-crystallographic twofold axis. The packing in the crystalline state is dictated by the mediation of crystallization water molecules, which connect the complex units through strong O-H···S and weak C-H···O hydrogen bonds into infinite zigzag chains.Having the gallium complex (Me 2 AsS 2 ) 3 Ga (1), we tried to crystallize it in order to see whether the arrangement around gallium is the same as in (Me 2 AsS 2 ) 3 In [14] or is different as in the case of [(Me 2 CHCH 2 ) 2 PS 2 ] 3 M, in which for M = Ga the arrangement is tetrahedral, and for M = In the arrangement is octahedral. [6] However, the crystals isolated were due to the new and novel complex 2 described herein.

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The study of bis-chloromethyl-phosphinic acid crystal by ATR and Raman spectroscopy and X-ray diffraction

Glazachev

Avdontceva

Asfin

2018

Molecular Crystals and Liquid Crystals

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Dimethylphosphinato and dimethylarsinato complexes of group 13 metals and their chemistry

Cited by 4 publications

References 23 publications

Stabilization of Al(iii) solutions by complexation with cacodylic acid: speciation and binding features

Stabilization of Al(iii) solutions by complexation with cacodylic acid: speciation and binding features

The Structure of Bis(dimethyldithioarsinato)gallium(III) Sulfide [(Me₂AsS₂)₂Ga]₂S·0.75H₂O: A Hydrolysis Product of (Me₂AsS₂)₃Ga that Contains a Bridging Sulfide and both Pendant and Bridging Dimethyldithioarsinato Ligands

The study of bis-chloromethyl-phosphinic acid crystal by ATR and Raman spectroscopy and X-ray diffraction

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Dimethylphosphinato and dimethylarsinato complexes of group 13 metals and their chemistry

Cited by 4 publications

References 23 publications

Stabilization of Al(iii) solutions by complexation with cacodylic acid: speciation and binding features

Stabilization of Al(iii) solutions by complexation with cacodylic acid: speciation and binding features

The Structure of Bis(dimethyldithioarsinato)gallium(III) Sulfide [(Me2AsS2)2Ga]2S·0.75H2O: A Hydrolysis Product of (Me2AsS2)3Ga that Contains a Bridging Sulfide and both Pendant and Bridging Dimethyldithioarsinato Ligands

The study of bis-chloromethyl-phosphinic acid crystal by ATR and Raman spectroscopy and X-ray diffraction

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The Structure of Bis(dimethyldithioarsinato)gallium(III) Sulfide [(Me₂AsS₂)₂Ga]₂S·0.75H₂O: A Hydrolysis Product of (Me₂AsS₂)₃Ga that Contains a Bridging Sulfide and both Pendant and Bridging Dimethyldithioarsinato Ligands