A dication is any cation, of general formula X2+, formed by the removal of two electrons from a neutral species. Diatomic dications corresponding to stable neutral species (e.g. H2+2 formed by removal of two electrons from H2) often decay quickly into two singly charged particles (H+), due to the loss of electrons in bonding molecular orbitals. Energy levels of diatomic dications can be studied with good resolution by measuring the yield of pairs of zero-kinetic-energy electrons from double photoionization of a molecule as a function of the photoionizing wavelength (threshold photoelectrons coincidence spectroscopy – TPEsCO). The He2+2 dication is kinetically stable. An example of a stable diatomic dication which is not formed by oxidation of a neutral diatomic molecule is the dimercury dication Hg2+2. An example of a polyatomic dication is S2+8, formed by oxidation of S8 and unstable with respect to further oxidation over time to form SO2. Many organic dications can be detected in mass spectrometry for example CH2+4 (a CH2+2·H2 complex) and the acetylene dication C2H2+2. The adamantyl dication has been synthesized. (Wikipedia).
👉 Learn about polygons and how to classify them. A polygon is a plane shape bounded by a finite chain of straight lines. A polygon can be concave or convex and it can also be regular or irregular. A concave polygon is a polygon in which at least one of its interior angles is greater than 1
From playlist Classify Polygons
What is the difference between convex and concave
👉 Learn about polygons and how to classify them. A polygon is a plane shape bounded by a finite chain of straight lines. A polygon can be concave or convex and it can also be regular or irregular. A concave polygon is a polygon in which at least one of its interior angles is greater than 1
From playlist Classify Polygons
Synthesis Workshop: Aziridine Synthesis via Electrogenerated Dications with Dylan Holst (Episode 66)
In this Research Spotlight episode, we're joined by Dylan Holst, who shares with us his work on aziridine synthesis via electrogenerated dications. Key reference: Nature 2021, 596, 74-79. https://doi.org/10.1038/s41586-021-03717-7 Also see: Nat. Chem. 2021. https://doi.org/10.1038/s41557-
From playlist Research Spotlights
What is the difference between convex and concave polygons
👉 Learn about polygons and how to classify them. A polygon is a plane shape bounded by a finite chain of straight lines. A polygon can be concave or convex and it can also be regular or irregular. A concave polygon is a polygon in which at least one of its interior angles is greater than 1
From playlist Classify Polygons
Aromatic stability II | Aromatic Compounds | Organic chemistry | Khan Academy
How the geometry of a molecule plays into aromaticity. Why cyclooctatetraene is not aromatic like benzene. Created by Jay. Watch the next lesson: https://www.khanacademy.org/science/organic-chemistry/aromatic-compounds/aromatic-stability/v/aromatic-stability-iii?utm_source=YT&utm_medium=D
From playlist Aromatic compounds | Organic Chemistry | Khan Academy
👉 Learn about polygons and how to classify them. A polygon is a plane shape bounded by a finite chain of straight lines. A polygon can be concave or convex and it can also be regular or irregular. A concave polygon is a polygon in which at least one of its interior angles is greater than 1
From playlist Classify Polygons
👉 Learn about dilations. Dilation is the transformation of a shape by a scale factor to produce an image that is similar to the original shape but is different in size from the original shape. A dilation that creates a larger image is called an enlargement or a stretch while a dilation tha
From playlist Transformations
Determine if a polygon is concave or convex ex 2
👉 Learn about polygons and how to classify them. A polygon is a plane shape bounded by a finite chain of straight lines. A polygon can be concave or convex and it can also be regular or irregular. A concave polygon is a polygon in which at least one of its interior angles is greater than 1
From playlist Classify Polygons
What are the names of different types of polygons based on the number of sides
👉 Learn about polygons and how to classify them. A polygon is a plane shape bounded by a finite chain of straight lines. A polygon can be concave or convex and it can also be regular or irregular. A concave polygon is a polygon in which at least one of its interior angles is greater than 1
From playlist Classify Polygons
What are four types of polygons
👉 Learn about polygons and how to classify them. A polygon is a plane shape bounded by a finite chain of straight lines. A polygon can be concave or convex and it can also be regular or irregular. A concave polygon is a polygon in which at least one of its interior angles is greater than 1
From playlist Classify Polygons
Synthesis Workshop: The Baylis-Hillman Reaction (Episode 17)
In this video, we explore the Baylis-Hillman reaction! References: Foundational work by Morita: Bull. Chem. Soc. Jpn. 1968, 41, 2815. Subsequent developments by Baylis and Hillman: Acrylic compounds. De 2155113, 1972 (Celanese Corp.). For mechanistic investigation and discussion, see: (a
From playlist Named Reactions
Síntesis Total de Tafluprost, un Análogo de Prostaglandina para el Glaucoma y la Hipertensión ocular
En este episodio, vemos la síntesis del Tafluprost del grupo Fletcher (2020) en español. Parent reference: Org. Lett. 2020, 22, 2991-2994. Other references (in order of appearance): For a review of asymmetric approaches to prostaglandins, see Org. Biomol. Chem. 2017, 15, 6281-6301. For a
From playlist Episodios en Español
Black Hat USA 2010: The Emperor Has No Clothes: Insecurities in Security Infrastructure 4/4
Speakers: Ben Feinstein, Jeff Jarmoc, Dan King Your security infrastructure (firewalls, IDS/IPS devices, management consoles, etc.) holds a very sensitive position of trust. This equipment is relied upon to reliably perform security critical functions under potentially hostile conditions.
From playlist Black Hat USA 2010
Source Boston 2010: NT Object Insecurity 1/5
Clip 1/5 Speaker: Riley Hassell, iSec Partners At the core of the Microsoft Windows operations system is the Object Manager. This subsystem is one of the most used and also least documented subsystems within Microsoft Windows. We use it for every action we perform. The management of al
From playlist SOURCE Boston 2010
ENCELADUS - Saturn's Moon That May Have Life?
Hello and welcome to What Da Math! In this video, we will talk about the new finding that indicates the possibility for having life on Enceladus. Patreon page: https://www.patreon.com/user?u=2318196&ty=h Enjoy and please subscribe. Other videos here: https://www.youtube.com/playlist?lis
From playlist Saturn and Its Moons
What is the definition of a regular polygon and how do you find the interior angles
👉 Learn about polygons and how to classify them. A polygon is a plane shape bounded by a finite chain of straight lines. A polygon can be concave or convex and it can also be regular or irregular. A concave polygon is a polygon in which at least one of its interior angles is greater than 1
From playlist Classify Polygons
HSC Chemistry Chemical Monitoring and Management Identifying anions
From playlist HSC Chemistry - Chemical Monitoring and Management
What is the difference between concave and convex polygons
👉 Learn about polygons and how to classify them. A polygon is a plane shape bounded by a finite chain of straight lines. A polygon can be concave or convex and it can also be regular or irregular. A concave polygon is a polygon in which at least one of its interior angles is greater than 1
From playlist Classify Polygons