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Acetonitrile, often abbreviated MeCN (methyl cyanide), is the chemical compound with the formula CH 3 CN and structure H 3 C−C≡N.This colourless liquid is the simplest organic nitrile (hydrogen cyanide is a simpler nitrile, but the cyanide anion is not classed as organic).
At room temperature or warmer, equilibrium hydrogen gas contains about 25% of the para form and 75% of the ortho form. [33] The ortho form is an excited state , having higher energy than the para form by 1.455 kJ/mol, [ 34 ] and it converts to the para form over the course of several minutes when cooled to low temperature. [ 35 ]
The elements between uranium and curium form a transition between these two kinds of behaviour, where higher oxidation states continue to exist, but lose stability with respect to the +3 state. [82] The +2 state becomes more important near the end of the series, and is the most stable oxidation state for nobelium, the last 5f element. [ 82 ]
Amine. In chemistry, amines (/ ə ˈ m iː n, ˈ æ m iː n /, [1] [2] UK also / ˈ eɪ m iː n / [3]) are compounds and functional groups that contain a basic nitrogen atom with a lone pair.Formally, amines are derivatives of ammonia (NH 3), wherein one or more hydrogen atoms have been replaced by a substituent such as an alkyl or aryl group [4] (these may respectively be called alkylamines ...
List of countries by carbon emissions Location % of global total Fossil emissions (1,000,000 tons per year) % change from 2000 2023 2000 World 100%: 39,023.94
Harry Potter and the Deathly Hallows – Part 2 is a 2011 fantasy film directed by David Yates from a screenplay by Steve Kloves. [4] The film is the second of two cinematic parts based on the 2007 novel Harry Potter and the Deathly Hallows by J. K. Rowling.