نتایج جستجو برای: boron compounds

تعداد نتایج: 243622  

Journal: :Batteries 2022

Boron and boron compounds have been extensively studied together in the history development of lithium batteries, which are crucial to decarbonization automotive industry beyond. With a wide examination battery components, but boron-centric approach raw materials, this review attempts summarize past recent studies on following: battery, parts batteries they studied, what improvements offered fo...

Journal: :Organic & biomolecular chemistry 2014
A Filipa F da Silva Raquel S G R Seixas Artur M S Silva Joana Coimbra Ana C Fernandes Joana P Santos António Matos José Rino Isabel Santos Fernanda Marques

Herein we present the synthesis and characterization of benzo[b]acridin-12(7H)-ones bearing carboranyl moieties and test their biological effectiveness as boron neutron capture therapy (BNCT) agents in cancer treatment. The cellular uptake of these novel compounds into the U87 human glioblastoma cells was evaluated by boron analysis (ICP-MS) and by fluorescence imaging (confocal microscopy). Th...

Journal: :Chemical communications 2015
Holger Braunschweig William C Ewing Katharina Ferkinghoff Alexander Hermann Thomas Kramer Rong Shang Eva Siedler Christine Werner

The reactions of isonitriles with a variety of metalloboryl and metalloborylene species are shown to yield a range of products, none of which display the typical Lewis acid-base reactivity previously observed between such metal complexes and other Lewis bases. Insertions of one, or several, isonitriles into the metal-boron bond give cyclic and spiro compounds with bonding controlled by the elec...

Journal: :European Journal of Inorganic Chemistry 2023

The Front Cover shows a captivating image of two gears intricately interlocking and merging into one another. Metaphorically, gear represents the concept free aluminylene, while other embodies diverse boron Lewis acids. As these unite, they give rise to distinct forms aluminum−boron-bonded compounds. One variant encompasses an aluminum−boron electron-sharing bond, manifests dative bond. This di...

Journal: :Journal of molecular modeling 2012
Aloysus K Lawong David W Ball

As a follow-up on a study of a family of boron-oxygen-nitrogen compounds composed of two datively bonded B-O-N backbones, we investigate a similar series of compounds that have similar fragments but are covalently bonded. B3LYP/6-31G(d,p) quantum mechanical calculations have been performed to determine the minimum-energy geometries, vibrational frequencies, and thermochemical properties of the ...

Journal: :Bioscience, biotechnology, and biochemistry 2005
Ken-ichi Nihei Kimiko Hashimoto Kazuo Miyairi Toshikatsu Okuno

Four possible stereoisomers of 3-hydroxy-4-methyltetradecanoic acid were enantioselectively synthesized by using Sharpless epoxidation and a subsequent epoxide-ring opening reaction with trimethylaluminum as the key steps. The absolute configuration of the beta-oxyacid component of antifungal cyclodepsipeptides W493 A and B was consequently determined as 3S,4R.

D. Meena, H.S. Palsania, N. Chejara, N. Jakhar, P. Meena, S.K. Gupta,

Background: A 5 Ci 241Am-Be radio isotopic neutron source-based prompt gamma neutron activation analysis (PGNAA) setup was designed for estimation of minimum detectable concentration (MDC) of elements in aqueous solutions. Materials and Methods: Performance variables related to PGNAA setup (source to sample distance, sample to detector distance and volume of water) were optimized experimentally...

Journal: : 2021

Background Seven dioxaborole compounds are investigated in this study. Structural and spectral characterization is done at M062X/6-31+G(d,p) level the water. Active sites of these determined using molecular electrostatic potential (MEP) maps. Electrophilic nucleophilic attack regions determined. Aim We aimed to determine whether Boron-Containing Compounds (BCCs) inhibitor used treatment COVID-1...

2014
Ignacio Caretti Ignacio Jiménez

We present a detailed study of B1-xNx (0<x<0.6) films synthesized at room temperature by N2 + ion-beam assisted evaporation of boron. The atom-ion ratio was related to the final boron concentration as determined by X-ray energy dispersive spectroscopy (XEDS), and to the bonding structure explored by infrared (IR) and X-ray absorption near-edge structure (XANES) spectroscopies. IR and XANES reve...

2014
Kai Hong Xun Liu James P. Morken

The reaction of 1,1-bis(pinacolboronate) esters with alkyl halides can be effected by metal alkoxides and provides a strategy for the construction of organoboronate compounds. The reaction is found to occur by alkoxide-induced deborylation and generation of a boron-stabilized carbanion.

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