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For the design and synthesis of [2.2.2]cryptand, [3] Jean-Marie Lehn shared the Nobel Prize in Chemistry. The compound was originally prepared starting with the diacylation of the diamine-diether: [4] [CH 2 OCH 2 CH 2 NH 2] 2 + [CH 2 OCH 2 COCl] 2 → [CH 2 OCH 2 CH 2 NHC(O)CH 2] 2 + 2 HCl. The resulting macrocyclic diamide is reduced by ...
The archetypal 2-category is the category of small categories, with natural transformations serving as 2-morphisms; typically 2-morphisms are given by Greek letters (such as above) for this reason. The objects ( 0-cells ) are all small categories, and for all objects A and B the category C ( A , B ) {\displaystyle \mathbf {C} (A,B)} is a ...
2,2-Dimethoxypropane (DMP) is an organic compound with the formula (CH 3) 2 C(OCH 3) 2. A colorless liquid, it is the product of the condensation of acetone and methanol. DMP is used as a water scavenger in water-sensitive reactions. Upon acid-catalyzed reaction, DMP reacts quantitatively with water to form acetone and methanol. [2]
The Sukhoi Su-2 (Russian: Сухой Су-2) is a Soviet reconnaissance and light bomber aircraft used in the early stages of World War II. It was the first airplane designed by Pavel Sukhoi . The basic design received an engine and armament upgrade ( Su-4 ) and was modified for the ground-attack role ( ShB ).
Despicable Me 2 debuted on June 5, 2013, at Event Cinemas in Bondi Junction, Sydney, Australia, [50] followed by a premiere on June 12, at the Annecy International Animated Film Festival. [51] In the United States, the film's premiere took place on June 22, at the Universal CityWalk in Los Angeles, [ 52 ] [ 53 ] and was released in theaters on ...
The Xiaomi Mi Band 2 is a low cost, wearable activity tracker produced by Xiaomi. It was released on 7 June 2016. [1] [2] Unlike its predecessor, the Xiaomi Mi Band 2 comes with an OLED screen and a capacitive button. In September 2017, Xiaomi released an ultra low-cost version of the Mi Band 2, titled "Mi Band - HRX Edition"