A Crystalline Diazadiborinine Radical Cation and Its Boron‐Centered Radical Reactivity

Wang, Baolin; Li, Yongxin; Ganguly, Rakesh; Webster, Richard D.; Kinjo, Rei

doi:10.1002/ange.201803547

Cited by 19 publications

(1 citation statement)

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“…Boron plays a pivotal role in various applications such as fuel synthesis, organic LEDs, hydrogen storage. Boron has scarcity of electron and because of this many compounds of Boron act like electrophiles, Lewis acids [10]; while in specific situations, atom may be negatively charged or polarized, so behaving like nucleophile or Lewis base [11]. This feasibility of boron permits forming its compounds for particular applications [12].…”

Section: Introductionmentioning

confidence: 99%

Structural and temperature dependent dielectric behaviour of B_xFe₍₃₋_x₎O₄ nanoferrite particles

Donta

2024

Micro & Nano Letters

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The auto‐combustion technique was employed to synthesize nano particles of BxFe(3−x)O4 (x = 0.0, 0.7, 1.18, 1.36 and 1.54). The resulting structural and dielectric properties of the boron doped Fe3O4 were evaluated. XRD analysis confirmed the presence of a single spinel structure with crystallite dimensions ranging from 21.18 to 26.43 nm and lattice parameters of 8.211 to 8.487 Ǻ. The morphological images revealed homogenous and spherical grain sizes, while EDX confirmed the presence of constituent elements used. The X‐ray density increased whereas the bulk density and the porosity decreased with boron substitution. The study of dielectric properties and AC conductivity (σAC) was demonstrated and the AC conductivity decreased with increasing boron concentration, indicating a hopping mechanism. Moreover, noticeable variations in dielectric loss, AC conductivity, and dielectric permittivity with temperature and frequency were observed. These observations were attributed to the Maxwell–Wagner interfacial polarization and the hopping of charges between Fe3+ and Fe2+ ions.

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Section: Introductionmentioning

confidence: 99%

Structural and temperature dependent dielectric behaviour of B_xFe₍₃₋_x₎O₄ nanoferrite particles

Donta

2024

Micro & Nano Letters

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Threat to the Throne: Can Two Cooperating Boron Atoms Rival Transition Metals in Chemical Bond Activation and Catalysis?

Prey

Wagner

2020

Adv Synth Catal

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Certain electron‐rich 1,4‐diborabenzene derivatives efficiently activate single, double, and triple bonds and thereby increasingly compete with transition metals in homogeneous catalysis. This review compares the activation of three model substrates (H2, H2C=CH2, CO2) by (i) 9,10‐dihydro‐9,10‐diboraanthracene dianions, (ii) their neutral carbene‐stabilized congeners, (iii) 1,3,2,5‐diazadiborinines, and (iv) 1,4,2,5‐diazadiborinines. Distinct structure‐properties relationships become apparent, the most influential factors being (i) the steric demands of the B‐bonded substituents, (ii) the charges on the B‐doped (hetero)arenes, (iii) charge polarization as a result of additional N‐doping, and (iv) the energies and nodal structures of the frontier orbitals. The observed reactions are explained by a transition metal‐like activation mechanism. If the two boron atoms are chemically inequivalent, contributions of a B(+I)/B(+III) mixed‐valence state determine the observed regioselectivities when polar substrates are added. The lessons learned from the conversions of the model substrates are subsequently used to rationalize the behavior of the B2 heterocycles also toward more sophisticated substrate molecules. Finally, catalytic cycles based on H2‐ and H−‐transfers, hydroboration reactions, and CO2 reductions will be covered.

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A Main‐Group Element Radical Based One‐Dimensional Magnetic Chain

et al. 2019

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The first main-group element radical based onedimensional magnetic chain (1K) n was realized by oneelectron reduction of the pyridinyl functionalizedb orane 1 with elemental potassium in THF in the absence of 18crown-6 (18-c-6). The electron spin density of (1K) n mainly resides at the boron centers with ac onsiderable contribution from central benzene and pyridine moieties.T he spin centers exhibit an antiferromagnetic interaction as demonstrated by magnetic measurements and theoretical calculations.I nc ontrast, the reduction in the presence of 18-c-6 afforded the separated radical anion salt 1K(Crown),i nw hicht he potassium cation was trapped by THF and 18-c-6 molecules.Further one-electron reduction of 1K(Crown) and (1K) n led to the diamagnetic monomer and polymer,respectively.Supportinginformation and the ORCID identification number(s) for the author(s) of this article can be found under: https://doi.

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A Crystalline Diazadiborinine Radical Cation and Its Boron‐Centered Radical Reactivity

Abstract: One-electron oxidation of 1,4,2,5-diazadiborinine

Cited by 19 publications

References 64 publications

Structural and temperature dependent dielectric behaviour of B_xFe₍₃₋_x₎O₄ nanoferrite particles

Structural and temperature dependent dielectric behaviour of B_xFe₍₃₋_x₎O₄ nanoferrite particles

Threat to the Throne: Can Two Cooperating Boron Atoms Rival Transition Metals in Chemical Bond Activation and Catalysis?

A Main‐Group Element Radical Based One‐Dimensional Magnetic Chain

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A Crystalline Diazadiborinine Radical Cation and Its Boron‐Centered Radical Reactivity

Abstract: One-electron oxidation of 1,4,2,5-diazadiborinine

Cited by 19 publications

References 64 publications

Structural and temperature dependent dielectric behaviour of BxFe(3−x)O4 nanoferrite particles

Structural and temperature dependent dielectric behaviour of BxFe(3−x)O4 nanoferrite particles

Threat to the Throne: Can Two Cooperating Boron Atoms Rival Transition Metals in Chemical Bond Activation and Catalysis?

A Main‐Group Element Radical Based One‐Dimensional Magnetic Chain

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Product

Resources

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Structural and temperature dependent dielectric behaviour of B_xFe₍₃₋_x₎O₄ nanoferrite particles

Structural and temperature dependent dielectric behaviour of B_xFe₍₃₋_x₎O₄ nanoferrite particles