Thermal stability of mixed-valent binuclear osmium (II, III) carboxylates

Thermal stabilities studies of mixed-valent binuclear osmium carboxylates, Os2II,III (O2CR)4X, (where RCO2- are the equatorial carboxylates (R = alkyl group) and X- is the axial ligand (carboxylate or halide (Cl-, I-or Br-)) anion, have been carried out. The following series were analyzed: Os 2(O2C...

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Autores principales:	Fabiyi, F.A.S., Rivero, M.N., Adewuyi, G.O.
Formato:	JOUR
Materias:	Binuclear osmium Mixed-valent Thermal decomposition
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_15533174_v40_n1_p32_Fabiyi
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

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spelling	todo:paper_15533174_v40_n1_p32_Fabiyi2023-10-03T16:25:24Z Thermal stability of mixed-valent binuclear osmium (II, III) carboxylates Fabiyi, F.A.S. Rivero, M.N. Adewuyi, G.O. Binuclear osmium Mixed-valent Thermal decomposition Thermal stabilities studies of mixed-valent binuclear osmium carboxylates, Os2II,III (O2CR)4X, (where RCO2- are the equatorial carboxylates (R = alkyl group) and X- is the axial ligand (carboxylate or halide (Cl-, I-or Br-)) anion, have been carried out. The following series were analyzed: Os 2(O2C (CH2)n - 2CH2) 2; Os2(O2C(CH2)n - 2CH2)2Cl; (and also their analogs where X = Br or I); Os2 (benzoate)2Cl; Os2 (x, y, z - BmOCn)4Cl, (where x, y, z - BmOCn are substituted benzoates, m = number of alkoxy chains on the aromatic rings in the positions x, y, z and n = number of carbon atoms in each linear alkoxy chains), and also, for comparative purposes, their divalent analogs, Os2(4-B1OCn)4Cl; Os 2(3, 4- B2OCn)4 Cl and Os2(4-B1OCn) 4Cl. In all cases the number of n were varied. The nature of the axial ligands was found to dictate the two decomposition pathways, while the equatorial carboxylates play an insignificant role. Their thermal decompositions were found to involve the reduction of the bimetallic center to Os. The pentacarboxylates (X-= CH3(CH2)n - 2CO2-) have a two-step mechanism with Os 2II,II(O2C (CH2)n - 2CH 2)2 as their intermediate products, while the halocomplexes (X-= halide) proceed in only one complex step. The gases given off during the decomposition processes were analyzed. Copyright © Taylor & Francis Group, LLC. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_15533174_v40_n1_p32_Fabiyi
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Binuclear osmium Mixed-valent Thermal decomposition
spellingShingle	Binuclear osmium Mixed-valent Thermal decomposition Fabiyi, F.A.S. Rivero, M.N. Adewuyi, G.O. Thermal stability of mixed-valent binuclear osmium (II, III) carboxylates
topic_facet	Binuclear osmium Mixed-valent Thermal decomposition
description	Thermal stabilities studies of mixed-valent binuclear osmium carboxylates, Os2II,III (O2CR)4X, (where RCO2- are the equatorial carboxylates (R = alkyl group) and X- is the axial ligand (carboxylate or halide (Cl-, I-or Br-)) anion, have been carried out. The following series were analyzed: Os 2(O2C (CH2)n - 2CH2) 2; Os2(O2C(CH2)n - 2CH2)2Cl; (and also their analogs where X = Br or I); Os2 (benzoate)2Cl; Os2 (x, y, z - BmOCn)4Cl, (where x, y, z - BmOCn are substituted benzoates, m = number of alkoxy chains on the aromatic rings in the positions x, y, z and n = number of carbon atoms in each linear alkoxy chains), and also, for comparative purposes, their divalent analogs, Os2(4-B1OCn)4Cl; Os 2(3, 4- B2OCn)4 Cl and Os2(4-B1OCn) 4Cl. In all cases the number of n were varied. The nature of the axial ligands was found to dictate the two decomposition pathways, while the equatorial carboxylates play an insignificant role. Their thermal decompositions were found to involve the reduction of the bimetallic center to Os. The pentacarboxylates (X-= CH3(CH2)n - 2CO2-) have a two-step mechanism with Os 2II,II(O2C (CH2)n - 2CH 2)2 as their intermediate products, while the halocomplexes (X-= halide) proceed in only one complex step. The gases given off during the decomposition processes were analyzed. Copyright © Taylor & Francis Group, LLC.
format	JOUR
author	Fabiyi, F.A.S. Rivero, M.N. Adewuyi, G.O.
author_facet	Fabiyi, F.A.S. Rivero, M.N. Adewuyi, G.O.
author_sort	Fabiyi, F.A.S.
title	Thermal stability of mixed-valent binuclear osmium (II, III) carboxylates
title_short	Thermal stability of mixed-valent binuclear osmium (II, III) carboxylates
title_full	Thermal stability of mixed-valent binuclear osmium (II, III) carboxylates
title_fullStr	Thermal stability of mixed-valent binuclear osmium (II, III) carboxylates
title_full_unstemmed	Thermal stability of mixed-valent binuclear osmium (II, III) carboxylates
title_sort	thermal stability of mixed-valent binuclear osmium (ii, iii) carboxylates
url	http://hdl.handle.net/20.500.12110/paper_15533174_v40_n1_p32_Fabiyi
work_keys_str_mv	AT fabiyifas thermalstabilityofmixedvalentbinuclearosmiumiiiiicarboxylates AT riveromn thermalstabilityofmixedvalentbinuclearosmiumiiiiicarboxylates AT adewuyigo thermalstabilityofmixedvalentbinuclearosmiumiiiiicarboxylates
_version_	1807324373362671616

Thermal stability of mixed-valent binuclear osmium (II, III) carboxylates

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