Bonding in Barium Boryloxides, Siloxides, Phenoxides and Silazides: A Comparison with the Lighter Alkaline Earths.

Chemistry : a European Journal
Erwann Le CozYann Sarazin

Abstract

Barium complexes ligated by bulky boryloxides [OBR2 ]- (where R=CH(SiMe3 )2 , 2,4,6-i Pr3 -C6 H2 or 2,4,6-(CF3 )3 -C6 H2 ), siloxide [OSi(SiMe3 )3 ]- , and/or phenoxide [O-2,6-Ph2 -C6 H3 ]- , have been prepared. A diversity of coordination patterns is observed in the solid state for both homoleptic and heteroleptic complexes, with coordination numbers ranging between 2 and 4. The identity of the bridging ligand in heteroleptic dimers [Ba(μ2 -X1 )(X2 )]2 depends largely on the given pair of ligands X1 and X2 . Experimentally, the propensity to fill the bridging position increases according to [OB{CH(SiMe3 )2 }2 )]- <[N(SiMe3 )2 ]- <[OSi(SiMe3 )3 ]- <[O(2,6-Ph2 -C6 H3 )]- <[OB(2,4,6-i Pr3 -C6 H2 )2 ]- . This trend is the overall expression of 3 properties: steric constraints, electronic density and σ- and π-donating capability of the negatively charged atom, and ability to generate Ba ⋅ ⋅ ⋅ F, Ba ⋅ ⋅ ⋅ C(π) or Ba ⋅ ⋅ ⋅ H-C secondary interactions. The comparison of the structural motifs in the complexes [Ae{μ2 -N(SiMe3 )2 }(OB{CH(SiMe3 )2 }2 )]2 (Ae = Mg, Ca, Sr and Ba) suggest that these observations may be extended to all alkaline earths. DFT calculations highlight the largely prevailing ionic character of ligand-Ae bonding in a...Continue Reading

References

Feb 17, 2005·Journal of the American Chemical Society·Mark R CrimminMichael S Hill
Mar 21, 2006·Angewandte Chemie·Frank BuchSjoerd Harder
Aug 24, 2006·Journal of the American Chemical Society·Kelling J Donald, Roald Hoffmann
Sep 7, 2006·Journal of Computational Chemistry·Stefan Grimme
Jul 21, 2007·Angewandte Chemie·Anthony G M BarrettPanayiotis A Procopiou
Mar 13, 2008·Dalton Transactions : an International Journal of Inorganic Chemistry·Martin GärtnerMatthias Westerhausen
Nov 4, 2008·Angewandte Chemie·Jan SpielmannSjoerd Harder
Mar 27, 2009·Journal of the American Chemical Society·Jan Spielmann, Sjoerd Harder
Aug 27, 2009·Journal of the American Chemical Society·Anthony G M BarrettPanayiotis A Procopiou
May 7, 2010·Chemical Communications : Chem Comm·William D BuchananKarin Ruhlandt-Senge
Jul 14, 2010·Inorganic Chemistry·William D BuchananKarin Ruhlandt-Senge
Apr 9, 2011·Dalton Transactions : an International Journal of Inorganic Chemistry·Michael S HillMary F Mahon
May 7, 2011·Journal of the American Chemical Society·Yann SarazinJean-François Carpentier
Sep 12, 2015·Angewandte Chemie·David J LiptrotAndrew S S Wilson
Jan 23, 2016·Chemical Society Reviews·Michael S HillCatherine Weetman
Mar 10, 2016·Chemistry : a European Journal·Yann SarazinJean-François Carpentier
Jun 7, 2018·Angewandte Chemie·Anne-Frédérique PécharmanMary F Mahon
Sep 20, 2018·Angewandte Chemie·Heiko BauerSjoerd Harder
Oct 6, 2018·Angewandte Chemie·Andrew S S WilsonLaurent Maron
Apr 27, 2019·Chemistry : a European Journal·Hanieh RoueindejiYann Sarazin
May 9, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Christian A FischerSjoerd Harder
Aug 15, 2019·Chemistry : a European Journal·Erwann Le CozYann Sarazin
Nov 23, 2019·Chemistry : a European Journal·Erwann Le CozYann Sarazin
Feb 25, 2020·Angewandte Chemie·Peter M ChappleYann Sarazin
Aug 19, 2020·Dalton Transactions : an International Journal of Inorganic Chemistry·Peter M ChappleYann Sarazin
Sep 12, 2020·The Journal of Physical Chemistry. a·Ionut-Tudor MoraruGabriela Nemes

❮ 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.