Solid state and solution structures of alkaline-earth complexes with lariat ethers containing aniline and benzimidazole pendants

Rodríguez-Rodríguez, Aurora; Carreira-Barral, Israel; Regueiro‐Figueroa, Martín; Esteban‐Gómez, David; Platas‐Iglesias, Carlos; Blas, Andrés de; Rodríguez‐Blas, Teresa

doi:10.1016/j.poly.2011.09.027

Cited by 6 publications

(4 citation statements)

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“…In previous papers we have reported the coordinative properties of cryptands and bibracchial lariat ethers incorporating aniline or benzimidazole pendant arms towards transition metal ions, lanthanide, and alkalineearth metal ions [20][21][22][23][24] . As a continuation of these works, herein we report a structural study both in the solid state and solution of alkaline complexes with the bibracchial lariat ethers L 1 -L 6 and cryptands L 7 and L 8 (Scheme 1).…”

Section: Introductionmentioning

confidence: 99%

“Cinderella” elements: Strategies to increase the stability of group 1 complexes by tailoring crown macrocycles

Rodríguez-Rodríguez

Carreira-Barral

Esteban‐Gómez

et al. 2014

Inorganica Chimica Acta

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The synthesis and structural characterization of six sodium complexes with bibracchial lariatethers containing aniline or benzimidazole side arms, and derived from 1,7-diaza-12-crown-4, 1,10-diaza-15crown-5 or 4,13-diaza-18-crown-6, are reported. The X-ray structures of four of these compounds have been obtained. Additionally, the X-ray structures of a sodium macrobicyclic complex derived from 1,10-diaza-15crown-5, and a potassium complex with a bibracchial lariat ether containing aniline side arms are also reported. Bonding distances as well as the stability constants in acetonitrile solution confirm that the coordination of the pendant arms provides an important contribution to the overall stability of the complexes, particularly when benzimidazole pendants are present rending more stable complexes, even more than cryptand complexes of the same size. Compared with the parent crown ethers, the stability increases when the side arms contain benzimidazole moieties but remains about the same order when aniline side arms are present.

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Section: Introductionmentioning

confidence: 99%

“Cinderella” elements: Strategies to increase the stability of group 1 complexes by tailoring crown macrocycles

Rodríguez-Rodríguez

Carreira-Barral

Esteban‐Gómez

et al. 2014

Inorganica Chimica Acta

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“…Only one seven-coordinate magnesium with six oxygen and one nitrogen atoms in the inner coordination sphere has been reported in the Cambridge Structure Database, which is composed of an aza-crown ether complex. Just a dozen similar structures − with seven-coordinate magnesium centers are known that involve oxygen and more than one nitrogen atom. The bond lengths are slightly longer than the ones of the dipicolylamine complex [ L DPA Mg 2 (μ 2 -NO 3 ) 2 ](NO 3 ) with 2.4 Å (N···Mg) and 2.16 Å (O···Mg).…”

Section: Resultsmentioning

confidence: 99%

Bimetallic Bis-anion Cascade Complexes of Magnesium in Nonaqueous Solution

et al. 2020

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Bimetallic magnesium(II) complexes are gaining significant interest in catalysis, yet their fundamental formation and behavior in organic media remain surprisingly unexplored relative to other divalent cations. To understand key principles of their formation, we investigate symmetric ditopic ligands bearing a phenolic backbone and characterize their ability to form dinuclear magnesium(II) cascade complexes with two bridging anions. Highfidelity production of bimetallic magnesium complexes relative to the monometallic complexes is indicative of positive cooperativity. Binding and recognition of analytes or substrates is a key characteristic of metal cascade complexes and relies on anion exchange, but this is also rarely studied with bimetallic magnesium complexes. Investigations with acetate, phosphate, and pyrophosphate reveal exchange of bridging nitrates using the bisdipicolylamine complex. Rare seven-coordinate magnesium centers are found for the ester complex. The findings in this study provide formative steps to establish design principles for future generations of bimetallic magnesium(II) complexes.

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“…For EuDO3APic, the carboxylate function of the picolinate group coordinates at a sterically demanding capping position, and thus protonation of the picolinate moiety facilitates complex dissociation. 52,53…”

Section: Kinetic Inertnessmentioning

confidence: 99%

Investigation of Ln³⁺ complexation by a DOTA derivative substituted by an imidazothiadiazole: synthesis, solution structure, luminescence and relaxation properties

Caillet,

Nunes,

Eliseeva

et al. 2024

Dalton Trans.

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Solid state and solution structures of alkaline-earth complexes with lariat ethers containing aniline and benzimidazole pendants

Abstract: Solid state and solution structures of alkaline-earth complexes with lariat ethers containing aniline and benzimidazole pendants, Polyhedron. 31 (2012) 402-412.

Cited by 6 publications

References 50 publications

“Cinderella” elements: Strategies to increase the stability of group 1 complexes by tailoring crown macrocycles

“Cinderella” elements: Strategies to increase the stability of group 1 complexes by tailoring crown macrocycles

Bimetallic Bis-anion Cascade Complexes of Magnesium in Nonaqueous Solution

Investigation of Ln³⁺ complexation by a DOTA derivative substituted by an imidazothiadiazole: synthesis, solution structure, luminescence and relaxation properties

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Solid state and solution structures of alkaline-earth complexes with lariat ethers containing aniline and benzimidazole pendants

Abstract: Solid state and solution structures of alkaline-earth complexes with lariat ethers containing aniline and benzimidazole pendants, Polyhedron. 31 (2012) 402-412.

Cited by 6 publications

References 50 publications

“Cinderella” elements: Strategies to increase the stability of group 1 complexes by tailoring crown macrocycles

“Cinderella” elements: Strategies to increase the stability of group 1 complexes by tailoring crown macrocycles

Bimetallic Bis-anion Cascade Complexes of Magnesium in Nonaqueous Solution

Investigation of Ln3+ complexation by a DOTA derivative substituted by an imidazothiadiazole: synthesis, solution structure, luminescence and relaxation properties

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Investigation of Ln³⁺ complexation by a DOTA derivative substituted by an imidazothiadiazole: synthesis, solution structure, luminescence and relaxation properties