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Silver is the chemical element with atomic number 47 and symbol . It is a transition metal. It has high electrical conductivity and commonly forms . Silver halides respond to light through changes that can generate metallic silver, connecting a chemical transformation with photographic image formation.
A block copolymer comprising two covalently joined blocks. Its domain morphology depends on block composition, segregation strength and chain conformational properties.
Jeremy M. Merritt coauthored research on beryllium dimer.[ref]
Beryllium dimer caught in the act of bonding by Jeremy M. Merritt and colleagues. publication title and author list
The neutral molecule Be-two. Its simplest filled sigma-two-s/bonding and antibonding description gives zero bond order, but mixing of accessible two-p configurations and electron correlation produce a weak covalent bond. Resolved vibrational levels establish a bound ground-state potential.
Vladimir E. Bondybey coauthored research on beryllium dimer.[ref]
Beryllium dimer caught in the act of bonding by Jeremy M. Merritt and colleagues. publication title and author list
The neutral molecule Be-two. Its simplest filled sigma-two-s/bonding and antibonding description gives zero bond order, but mixing of accessible two-p configurations and electron correlation produce a weak covalent bond. Resolved vibrational levels establish a bound ground-state potential.
Michael C. Heaven coauthored research on beryllium dimer.[ref]
Beryllium dimer caught in the act of bonding by Jeremy M. Merritt and colleagues. publication title and author list
The neutral molecule Be-two. Its simplest filled sigma-two-s/bonding and antibonding description gives zero bond order, but mixing of accessible two-p configurations and electron correlation produce a weak covalent bond. Resolved vibrational levels establish a bound ground-state potential.
Fei Luo coauthored research on helium dimer.[ref]
The weakest bond: experimental observation of helium dimer by Fei Luo and colleagues. publication title and author list
A very weakly bound van der Waals molecule, observed in cold helium expansions. The absence of an ordinary covalent bond in the elementary molecular orbital model must not be confused with absence of every possible bound dimer.
George C. McBane coauthored research on helium dimer.[ref]
The weakest bond: experimental observation of helium dimer by Fei Luo and colleagues. publication title and author list
A very weakly bound van der Waals molecule, observed in cold helium expansions. The absence of an ordinary covalent bond in the elementary molecular orbital model must not be confused with absence of every possible bound dimer.
Geunsik Kim coauthored research on helium dimer.[ref]
The weakest bond: experimental observation of helium dimer by Fei Luo and colleagues. publication title and author list
A very weakly bound van der Waals molecule, observed in cold helium expansions. The absence of an ordinary covalent bond in the elementary molecular orbital model must not be confused with absence of every possible bound dimer.
Clayton F. Giese coauthored research on helium dimer.[ref]
The weakest bond: experimental observation of helium dimer by Fei Luo and colleagues. publication title and author list
A very weakly bound van der Waals molecule, observed in cold helium expansions. The absence of an ordinary covalent bond in the elementary molecular orbital model must not be confused with absence of every possible bound dimer.
W. Ronald Gentry coauthored research on helium dimer.[ref]
The weakest bond: experimental observation of helium dimer by Fei Luo and colleagues. publication title and author list
A very weakly bound van der Waals molecule, observed in cold helium expansions. The absence of an ordinary covalent bond in the elementary molecular orbital model must not be confused with absence of every possible bound dimer.
A transition metal has an incompletely filled d subshell in its atom or a relevant cation. Its metal–ligand orbital interactions support varied oxidation states, magnetic states and coordination geometries.
Negative hyperconjugation is donation from an occupied lone-pair or related orbital into an antibonding sigma orbital. Nitrogen-to-P–X sigma-star donation contributes to phosphazene bonding. Short P–N bonds therefore do not require a model dominated by phosphorus pi orbitals.
Paul von Ragué Schleyer developed a short preparation of adamantane, a cage-shaped hydrocarbon, and became a major contributor to computational chemistry. His 1957 report illustrates how rearrangement reaction can turn a different carbon skeleton into a highly symmetrical cage.[ref]
A Simple Preparation of Adamantane by Paul von Ragué Schleyer. A Simple Preparation of Adamantane, 1957; institutional biography, Princeton Chemistry
Portrait of Paul von Ragué Schleyer
. Leo Radom, photograph of Paul von Ragué Schleyer in 1987; donated for WATOC use. CC BY-SA 4.0, via Wikimedia Commons. Source.A framework describing electronic ground-state properties using the electron density. Practical approximations require an exchange-correlation functional; this does not mean that explicit electrons have been replaced by a classical atom-only force field.
Elies Molins investigated the crystal structure of an iron complex with two hydropentalenyl ligands. The structural study provides a concrete example of multihapto coordination, in which several contiguous ligand atoms interact with the same metal centre.[ref]
Bis(η⁵-hydropentalenyl)iron by Elies Molins and others. 1996, Acta CrystallographicaC52,2414–2416: bis(eta5-hydropentalenyl)iron
Hong-Zhi Tang coauthored Enantiopure spiro[3.3]heptane-2,6-dicarboxylic acid by Hong-Zhi Tang and others.
A spiro compound contains rings sharing exactly one atom. In the reported spiro[3.3]heptane framework, two four-membered rings share the spiro center. The study concerns an enantiopure dicarboxylic-acid derivative of this constrained three-dimensional framework.
Thomas C. Coombs coauthored 1,3-Allylic Strain as a Strategic Diversification Element for Constructing Libraries of Substituted 2-Arylpiperidines by Thomas C. Coombs and others.
Allylic strain arises from unfavorable spatial contacts among substituents associated with an alkene and a neighboring saturated center. The publication uses 1,3-allylic strain as a conformational design element in constructing substituted piperidines, connecting a local steric interaction with control of a synthetic scaffold.
A reduction decreases an oxidation state, recording gain in the formal electron assignment. For , the decrease is . The reduced chemical species serves as the oxidizing agent in the coupled redox.
A neutral oxygen-donor extractant, , often abbreviated TBP. It can solvate metal nitrate species in solvent extraction. Selectivity depends on acidity, metal oxidation state, diluent and subsequent stripping conditions.
Pinned article: Introduction to the OurBigBook Project
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Intro to OurBigBook
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This feature makes it possible for readers to find better explanations of any topic created by other writers. And it allows writers to create an explanation in a place that readers might actually find it.
Figure 1. Screenshot of the "Derivative" topic page. View it live at: ourbigbook.com/go/topic/derivativeVideo 2. OurBigBook Web topics demo. Source. - local editing: you can store all your personal knowledge base content locally in a plaintext markup format that can be edited locally and published either:This way you can be sure that even if OurBigBook.com were to go down one day (which we have no plans to do as it is quite cheap to host!), your content will still be perfectly readable as a static site.
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Figure 3. Visual Studio Code extension installation.
Figure 5. . You can also edit articles on the Web editor without installing anything locally. Video 3. Edit locally and publish demo. Source. This shows editing OurBigBook Markup and publishing it using the Visual Studio Code extension. 
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