Low Valent Organoaluminum (+I, +II) Species

2012 ◽  
pp. 91-124 ◽  
Author(s):  
Rudolf J. Wehmschulte
Keyword(s):  
Low Valent

scholarly journals Facile synthesis of novel, known, and low-valent transition metal phosphates via reductive phosphatization

2021 ◽  
Author(s):  
Niklas Stegmann ◽  
Hilke Petersen ◽  
Claudia Weidenthaler ◽  
Wolfgang Schmidt
Keyword(s):  
Transition Metal ◽  
Oxidation States ◽  
Facile Synthesis ◽  
Metal Phosphates ◽  
Low Valent

Novel and known low valent transition metal phosphates (TMPs) are accessible via a novel and facile pathway. The method allows syntheses of TMPs also with reduced oxidation states. The key...

scholarly journals Low-valent dialkoxytitanium(ii): a useful tool for the synthesis of functionalized seven-membered ring compounds

2021 ◽  
Vol 57 (29) ◽  
pp. 3603-3606
Author(s):  
Florent Bodinier ◽  
Youssouf Sanogo ◽  
Janick Ardisson ◽  
Marie-Isabelle Lannou ◽  
Geoffroy Sorin
Keyword(s):  
Grignard Reagent ◽  
Membered Ring ◽  
Ring Compounds ◽  
Low Valent

Herein, we describe unprecedented access to all-carbon or heterocyclic seven-membered ring frameworks from 1,8-ene-ynes promoted by inexpensive low-valent titanium(ii) species, readily available from a combination of Ti(OiPr)4 and Grignard reagent.

scholarly journals Glycan-to-Glycan Binding: Molecular Recognition through Polyvalent Interactions Mediates Specific Cell Adhesion

Molecules ◽  
2021 ◽  
Vol 26 (2) ◽  
pp. 397
Author(s):  
Gradimir Misevic ◽  
Emanuela Garbarino
Keyword(s):  
Cell Adhesion ◽  
Plasma Membranes ◽  
Specific Cell ◽  
Cellular Interactions ◽  
New Paradigm ◽  
Tumor Cell Adhesion ◽  
Self Recognition ◽  
Structural And Functional Properties ◽  
Low Valent

Glycan-to-glycan binding was shown by biochemical and biophysical measurements to mediate xenogeneic self-recognition and adhesion in sponges, stage-specific cell compaction in mice embryos, and in vitro tumor cell adhesion in mammals. This intermolecular recognition process is accepted as the new paradigm accompanying high-affinity and low valent protein-to-protein and protein-to-glycan binding in cellular interactions. Glycan structures in sponges have novel species-specific sequences. Their common features are the large size >100 kD, polyvalency >100 repeats of the specific self-binding oligosaccharide, the presence of fucose, and sulfated and/or pyruvylated hexoses. These structural and functional properties, different from glycosaminoglycans, inspired their classification under the glyconectin name. The molecular mechanism underlying homophilic glyconectin-to-glyconectin binding relies on highly polyvalent, strong, and structure-specific interactions of small oligosaccharide motifs, possessing ultra-weak self-binding strength and affinity. Glyconectin localization at the glycocalyx outermost cell surface layer suggests their role in the initial recognition and adhesion event during the complex and multistep process. In mammals, Lex-to-Lex homophilic binding is structure-specific and has ultra-weak affinity. Cell adhesion is achieved through highly polyvalent interactions, enabled by clustering of small low valent structure in plasma membranes.

{MI(CO)X(CNArDArF2)4} (DArF = 3,5-(CF3)2C6H3; M = Re and Tc; X = Br and Cl) Complexes: Convenient Platforms for the Synthesis of Low-Valent Rhenium and Technetium Compounds

2021 ◽  
Author(s):  
Federico Salsi ◽  
Michael Neville ◽  
Myles Drance ◽  
Adelheid Hagenbach ◽  
Joshua S. Figueroa ◽  
...  
Keyword(s):  
Low Valent

Activation of Nitrogen-Rich Substrates by Low-Valent, Redox-Active Aluminum Species

2021 ◽  
Vol 40 (4) ◽  
pp. 490-499
Author(s):  
Weixing Chen ◽  
Vladimir A. Dodonov ◽  
Vladimir G. Sokolov ◽  
Li Liu ◽  
Evgeny V. Baranov ◽  
...  
Keyword(s):  
Redox Active ◽  
Active Aluminum ◽  
Low Valent

scholarly journals A diamino-substituted carbodiphosphorane as strong C-donor and weak N-donor: isolation of monomeric trigonal-planar L·ZnCl2

2020 ◽  
Vol 56 (58) ◽  
pp. 8051-8054 ◽  
Author(s):  
Alexander Kroll ◽  
Henning Steinert ◽  
Lennart T. Scharf ◽  
Thorsten Scherpf ◽  
Bert Mallick ◽  
...  
Keyword(s):  
Carbon Atom ◽  
Metal Species ◽  
Coordination Properties ◽  
Low Valent

Studies of the reactivity and coordination properties of the diamino-carbodiphosphorane 1 revealed that 1 is a weak N donor, but strongly coordinates via the carbon atom thus allowing the isolation of low-valent metal species.

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