Results 21 to 30 of about 3,726 (222)

Synthesis and X-ray characterization of 15- and 16-vertex closo-carboranes

open access: yesNature Communications, 2020
The synthesis of closo-carboranes with more than 14 vertexes is challenging, and no examples have been reported to date. Herein, the authors present the long-sought 15- and 16-vertex closo-carboranes, in which the introduction of silyl groups to the two ...
Fangrui Zheng   +3 more
doaj   +1 more source

Asymmetric 1,8/13,2,x-M2C2B10 14-vertex metallacarboranes by direct electrophilic insertion reactions; the VCD and BHD methods in critical analysis of cage C atom positions [PDF]

open access: yes, 2014
The isolation of six isomeric, low-symmetry, dicobaltacarboranes with bicapped hexagonal antiprismatic cage structures, always in low yield, is described from reactions in which 13-vertex cobaltacarborane anions and sources of cobalt-containing cations ...
Ellis, David   +4 more
core   +1 more source

Pharmacological development of target-specific delocalized lipophilic cation-functionalized carboranes for cancer therapy [PDF]

open access: yes, 2016
PURPOSE: Tumor cell heterogeneity and microenvironment represent major hindering factors in the clinical setting toward achieving the desired selectivity and specificity to malignant tissues for molecularly targeted cancer therapeutics. In this study,
A Kreso   +52 more
core   +1 more source

Could humans recognize odor by phonon assisted tunneling? [PDF]

open access: yes, 2006
Our sense of smell relies on sensitive, selective atomic-scale processes that are initiated when a scent molecule meets specific receptors in the nose. However, the physical mechanisms of detection are not clear.
A. M. Stoneham   +16 more
core   +2 more sources

Iridium-catalysed regioselective borylation of carboranes via direct B–H activation

open access: yesNature Communications, 2017
Functionalization of the multiple, similar, boron-hydrogen bonds in carboranes is difficult to achieve with selectivity. Here the authors report an iridium-catalysed borylation ofo-carboranes with high yields and regioselectivities.
Ruofei Cheng, Zaozao Qiu, Zuowei Xie
doaj   +1 more source

The Importance of Strain (Preorganization) in Beryllium Bonds

open access: yesMolecules, 2020
In order to explore the angular strain role on the ability of Be to form strong beryllium bonds, a theoretical study of the complexes of four beryllium derivatives of orthocloso-carboranes with eight molecules (CO, N2, NCH, CNH, OH2, SH2, NH3, and PH3 ...
Ibon Alkorta   +5 more
doaj   +1 more source

Synthesis and In Vitro Biological Evaluation of p-Carborane-Based Di-tert-butylphenol Analogs

open access: yesMolecules, 2023
Targeting inflammatory mediators and related signaling pathways may offer a rational strategy for the treatment of cancer. The incorporation of metabolically stable, sterically demanding, and hydrophobic carboranes in dual cycloxygenase-2 (COX-2)/5 ...
Sebastian Braun   +10 more
doaj   +1 more source

The topological uniqueness of the deltahedra found in the boranes BnHn2− (6≤n≤12) [PDF]

open access: yes, 1990
The deltahedra observed experimentally in the borane anions BnHn2− (6≤n≤12) are the only possible n-vertex deltahedra having only degree 4 and 5 vertices.
Duijvestijn, A.J.W., King, R.B.
core   +2 more sources

Competition between Halogen, Hydrogen and Dihydrogen Bonding in Brominated Carboranes [PDF]

open access: yes, 2016
Halogen bonds are a subset of noncovalent interactions with rapidly expanding applications in materials and medicinal chemistry. While halogen bonding is well known in organic compounds, it is new in the field of boron cluster chemistry.
Allen   +31 more
core   +2 more sources

Ir-catalyzed enantioselective B−H alkenylation for asymmetric synthesis of chiral-at-cage o‑carboranes

open access: yesNature Communications, 2021
Chiral-at-cage o-carboranes are clusters of carbon and boron atoms that, when functionalized, can lower the symmetry of the cluster. Here the authors present a method to alkenylate B–H bonds on ocarboranes enantioselectively via iridium catalysis.
Ruofei Cheng   +4 more
doaj   +1 more source

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