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The purplish-black color of solid potassium permanganate, and the intensely pink to purple color of its solutions, is caused by its permanganate anion, which gets its color from a strong charge-transfer absorption band caused by excitation of electrons from oxo ligand orbitals to empty orbitals of the manganese(VII) center.
Potassium octachlorodirhenate(III) is an inorganic compound with the formula K 2 Re 2 Cl 8.This dark blue salt is well known as an early example of a compound featuring quadruple bond between its metal centers.
This Olympic Games results index is a list of links to articles containing results of each Olympic sport at the Summer Olympics and Winter Olympics. Years not appearing are those when the event was not held.
The 2020 Summer Olympics, officially known as the Games of the XXXII Olympiad, were an international multi-sport event held in Tokyo, Japan, from 23 July to 8 August 2021. The Games were postponed by one year as part of the impact of the COVID-19 pandemic on sports. [2]
7 October 2020 – 16 May: 2020–21 UEFA Women's Champions League (final in Gothenburg) In the final, Barcelona defeated Chelsea , 4–0, to win their first UEFA Women's Champions League title. 17 September 2020 – 26 May: 2020–21 UEFA Europa League ( final in Gdańsk )
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Ammonium hexachloroiridate(IV) is the inorganic compound with the formula (NH 4) 2 [IrCl 6].This dark red solid is the ammonium salt of the iridium(IV) complex [IrCl 6] 2−.It is a commercially important iridium compound, [1] one of the most common complexes of iridium(IV).
In organic chemistry, syn-and anti-addition are different ways in which substituent molecules can be added to an alkene (R 2 C=CR 2) or alkyne (RC≡CR).The concepts of syn and anti addition are used to characterize the different reactions of organic chemistry by reflecting the stereochemistry of the products in a reaction.