Metallic Borides, La2Re3B7 and La3Re2B5, Featuring Extensive Boron-Boron Bonding

Inorganic Chemistry
Daniel E BugarisMercouri G Kanatzidis

Abstract

La2Re3B7 and La3Re2B5 have been synthesized in single-crystalline form from a molten La/Ni eutectic at 1000 °C in the first example of the flux crystal growth of ternary rare-earth rhenium borides. Both compounds crystallize in their own orthorhombic structure types, with La2Re3B7 (space group Pcca) having lattice parameters a = 7.657(2) Å, b = 6.755(1) Å, and c = 11.617(2) Å, and La3Re2B5 (space group Pmma) having lattice parameters a = 10.809(2) Å, b = 5.287(1) Å, and c = 5.747(1) Å. The compounds possess three-dimensional framework structures that are built up from rhenium boride polyhedra and boron-boron bonding. La3Re2B5 features fairly common B2 dumbbells, whereas La2Re3B7 has unique one-dimensional subunits composed of alternating triangular B3 and trans-B4 zigzag chain fragments. Also observed in La3Re2B5 is an unusual coordination of B by an octahedron of La atoms. Electronic band structure calculations predict that La2Re3B7 is a semimetal, which is observed in the electrical resistivity data as measured on single crystals, with behavior obeying the Bloch-Grüneisen model and a room-temperature resistivity ρ300 K of ∼375 μΩ cm. The electronic band structure calculations also suggest that La3Re2B5 is a regular metal.

References

Oct 28, 1996·Physical Review Letters·J P PerdewM Ernzerhof
Apr 1, 1977·Proceedings of the National Academy of Sciences of the United States of America·B T MatthiasH E Barz
Oct 24, 2006·Chemical Communications : Chem Comm·Boniface P T FokwaRichard Dronskowski
Dec 25, 2007·Acta Crystallographica. Section A, Foundations of Crystallography·George M Sheldrick
Dec 5, 2008·Journal of the American Chemical Society·Jonathan B LevineRichard B Kaner
Feb 14, 2009·Journal of the American Chemical Society·Evan M BenbowSusan E Latturner
Feb 10, 2010·Inorganic Chemistry·Julia V ZaikinaSusan E Latturner
Mar 16, 2011·Journal of Physics. Condensed Matter : an Institute of Physics Journal·L SalamakhaP Rogl
Jul 21, 2011·Physical Review Letters·Hiroshi MizoguchiHideo Hosono
Sep 1, 2011·Journal of Physics. Condensed Matter : an Institute of Physics Journal· AnupamC Geibel
Jan 12, 2012·Angewandte Chemie·Boniface P T Fokwa, Martin Hermus
Jun 14, 2012·Journal of Physics. Condensed Matter : an Institute of Physics Journal·K MukherjeeE V Sampathkumaran
Jun 27, 2012·Journal of the American Chemical Society·Patricia C TuckerSusan E Latturner
Apr 2, 2013·Inorganic Chemistry·Leonid SalamakhaGerald Giester
Dec 5, 2013·Chemistry : a European Journal·Anastasia M AlekseevaYuri Grin
Aug 26, 2014·Angewandte Chemie·Mohammed MbarkiBoniface P T Fokwa
Aug 5, 2015·Inorganic Chemistry·Daniel E BugarisMercouri G Kanatzidis

❮ Previous
Next ❯

Citations

Oct 11, 2016·Physical Chemistry Chemical Physics : PCCP·Kasper T MøllerTorben R Jensen

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.

Related Papers

Journal of Physics. Condensed Matter : an Institute of Physics Journal
Qiang ZhengAndreas Leithe-Jasper
Dalton Transactions : an International Journal of Inorganic Chemistry
Bayrammurad SaparovAthena S Sefat
© 2021 Meta ULC. All rights reserved