Posts Tagged ‘kinetic energy density’
Sunday, December 17th, 2017
Alkalides are anionic alkali compounds containing e.g. sodide (Na–), kalide (K–), rubidide (Rb–) or caeside (Cs–). Around 90 examples can be found in the Cambridge structure database (see DOI: 10.14469/hpc/3453 for the search query and results). So what about the ammonium analogue, ammonide (NH4–)? A quick search of Scifinder drew a blank! So here I take a look at this intriguingly simple little molecule.‡
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Tags:Alkalide, Ammonium, Anions, Atomic physics, Chemistry, electron gas, energy, free-electron gas, Hypervalency, Jahn-Teller, kinetic energy density, Matter, Nitrogen, potential energy surface, search query
Posted in Uncategorised | 2 Comments »
Wednesday, July 21st, 2010
In this post, I will take a look at what must be the most extraordinary small molecule ever made (especially given that it is merely a hydrocarbon). Its peculiarity is the region indicated by the dashed line below. Is it a bond? If so, what kind, given that it would exist sandwiched between two inverted carbon atoms?
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Tags:electronic energy, energy, energy density, excess kinetic energy, Hiberty and co, Hypervalency, Interesting chemistry, kinetic energy density, potential energy density, representative, X-ray
Posted in Uncategorised | 4 Comments »