Person: Jiménez Aparicio, Reyes
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First Name
Reyes
Last Name
Jiménez Aparicio
Affiliation
Universidad Complutense de Madrid
Faculty / Institute
Ciencias Químicas
Department
Química Inorgánica
Area
Química Inorgánica
Identifiers
4 results
Search Results
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Item Tetracarbonatodiruthenium Fragments and Lanthanide(III) Ions as Building Blocks to Construct 2D Coordination Polymers(Polymers, 2019) Gutiérrez Martín, Daniel; Cortijo Montes, Miguel; Martín Humanes, Álvaro; González Prieto, Rodrigo; Delgado Martínez, Patricia; Herrero Domínguez, Santiago; Priego Bermejo, José Luis; Jiménez Aparicio, ReyesTwo-dimensional coordination polymers of [Pr(DMSO)2(OH2)3][Ru2(CO3)4(DMSO)(OH2)]·5H2O (Prα) and [Ln(OH2)5][Ru2(CO3)4(DMSO)]·xH2O (Ln = Sm (Smβ), Gd (Gdβ)) formulae have been obtained by reaction of the corresponding Ln(NO3)3·6H2O dissolved in dimethyl sulphoxide (DMSO) and K3[Ru2(CO3)4]·4H2O dissolved in water. Some DMSO molecules are coordinated to the metal atoms reducing the possibilities of connection between the [Ru2(CO3)4]3− and Ln3+ building blocks giving rise to the formation of two-dimensional networks. The size of the Ln3+ ion and the synthetic method seem to have an important influence in the type of two-dimensional structure obtained. Slow diffusion of the reagents gives rise to Prα that forms a 2D net that is built by Ln3+ ions as triconnected nodes and two types of Ru25+ units as bi- and tetraconnected nodes with (2-c)(3-c)2(4-c) stoichiometry (α structure). An analogous synthetic procedure gives Smβ and Gdβ that display a grid-like structure, (2-c)2(4-c)2, formed by biconnected Ln3+ ions and two types of tetraconnected Ru25+ fragments (β structure). The magnetic properties of these compounds are basically explained as the sum of the individual contributions of diruthenium and lanthanide species, although canted ferrimagnetism or weak ferromagnetism are observed at low temperature.Item Microwave and solvothermal methods for the synthesis of nickel and ruthenium complexes with 9-anthracene carboxylate ligand(Inorganica Chimica Acta, 2015) Cortijo Montes, Miguel; Delgado-Martínez, Patricia; González Prieto, Rodrigo; Herrero Domínguez, Santiago; Jiménez Aparicio, Reyes; Perles Hernáez, Josefina; Priego Bermejo, José Luis; M.R. TorresMicrowave and solvothermal activation processes have been explored as tools for the preparation of various nickel and ruthenium complexes. Different reaction conditions are tested using ethanol or water as solvents. Three nickel derivatives, [Ni(9-atc)2(OH2)2(py)2]·2EtOH (1), [Ni2(9-atc)4(OH2)(py)4]·2H2O (2·2H2O), and [Ni2(9-atc)4(py)2] (3), and two diruthenium compounds, {[Ru2Cl(9-atc)4]·2H2O}n (4) and [Ru2(9-atc)4(EtOH)2]·2EtOH (5), are obtained. The crystal structure determination of complexes 1-3 and 5 is also described. Compound 1 displays a 1D extended supramolecular structure with hydrogen bonds involving crystallization solvent molecules. Compound 2 is dimetallic, and both nickel centers show an octahedral coordination environment, whereas complexes 3 and 5 display a typical carboxylate-bridged paddlewheel-type structure with two metal atoms connected by four bridging carboxylate ligands. All compounds show weak antiferromagnetic interactions except 3, where a strong intra-dimer antiferromagnetic coupling is observed. Compound 4 also shows a strong zero field splitting.Item Heteronuclear Dirhodium-Gold Anionic Complexes: Polymeric Chains and Discrete Units(Polymers, 2020) Fernández Bartolomé, Estefanía; Paula Cruz; Abad Galán, Laura; Cortijo Montes, Miguel; Patricia Delgado-Martínez; González Prieto, Rodrigo; Priego Bermejo, José Luis; Jiménez Aparicio, ReyesIn this article, we report on the synthesis and characterization of the tetracarboxylatodirhodium(II) complexes [Rh2(μ–O2CCH2OMe)4(THF)2] (1) and [Rh2(μ–O2CC6H4–p–CMe3)4(OH2)2] (2) by metathesis reaction of [Rh2(μ–O2CMe)4] with the corresponding ligand acting also as the reaction solvent. The reaction of the corresponding tetracarboxylato precursor, [Rh2(μ–O2CR)4], with PPh4[Au(CN)2] at room temperature, yielded the one-dimensional polymers (PPh4)n[Rh2(μ–O2CR)4Au(CN)2]n (R = Me (3), CH2OMe (4), CH2OEt (5)) and the non-polymeric compounds (PPh4)2{Rh2(μ–O2CR)4[Au(CN)2]2} (R = CMe3 (6), C6H4–p–CMe3 (7)). The structural characterization of 1, 3·2CH2Cl2, 4·3CH2Cl2, 5, 6, and 7·2OCMe2 is also provided with a detailed description of their crystal structures and intermolecular interactions. The polymeric compounds 3·2CH2Cl2, 4·3CH2Cl2, and 5 show wavy chains with Rh–Au–Rh and Rh–N–C angles in the ranges 177.18°–178.69° and 163.0°–170.4°, respectively. A comparative study with related rhodium-silver complexes previously reported indicates no significant influence of the gold or silver atoms in the solid-state arrangement of these kinds of complexes.Item The use of amidinate ligands in paddlewheel diruthenium chemistry(Coordination Chemistry Reviews, 2019) Cortijo Montes, Miguel; González Prieto, Rodrigo; Herrero Domínguez, Santiago; Priego Bermejo, José Luis; Jiménez Aparicio, ReyesThe amidinate anions have been widely used in the formation of dinuclear complexes with paddlewheel structure. The higher donor character of this type of ligands, compared to carboxylate ligands, increases the electronic density of the dimetallic units giving, in the case of ruthenium, stable complexes with a large variety of oxidation states containing Ru24+, Ru25+ and Ru26+ units. Even complexes with Ru22+, Ru23+ and Ru27+ cores have been detected in electrochemical measurements and isolated in some cases. The influence of formamidinate and benzamidinate ligands in the synthesis, characterization, properties and reactivity of metal-metal bonded diruthenium complexes with paddlewheel structure in several oxidation states is considered. A revision of the electronic and magnetic properties of diruthenium complexes and their relationship with the different electronic configurations found in this type of complexes is broadly documented. Additionally, the switching between oxidation states is considered through the discussion of the results obtained by electrochemical measurements. Finally, the most relevant applications of the amidinatodiruthenium complexes are also reviewed.