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Carbonite chemistry1/5/2024 Originally described from Edgehill Mines. Composition is between anthracite and graphite. Read more about how to correctly acknowledge RSC content. A natural coke formed by the action of igneous intrusions on coal. Permission is not required) please go to the Copyright If you want to reproduce the wholeĪrticle in a third-party commercial publication (excluding your thesis/dissertation for which If you are the author of this article, you do not need to request permission to reproduce figuresĪnd diagrams provided correct acknowledgement is given. Provided correct acknowledgement is given. If you are an author contributing to an RSC publication, you do not need to request permission Please go to the Copyright Clearance Center request page. To request permission to reproduce material from this article in a commercial publication, Provided that the correct acknowledgement is given and it is not used for commercial purposes. This article in other publications, without requesting further permission from the RSC, Aluminum carbonate is an ionic compound that contains aluminum (3+) cation and. Gilliard,Ĭreative Commons Attribution-NonCommercial 3.0 Unported Licence. The compound should be named Aluminum carbonate not aluminum carbonite. Soluble, crystalline, and thermally stable alkali CO 2 − and carbonite (CO 2 2−) clusters supported by cyclic(alkyl)(amino) carbenes Each of the products 2–8 was investigated using a combination of experimental and theoretical methods. It is notable that crystalline clusters of these alkali–CO 2 salts may also be isolated via the “one-pot” reaction of free CO 2 with free CAAC followed by the addition of alkali metals – a process which does not occur in the absence of carbene. One-electron reduction of CAAC–CO 2 adduct ( 1) with lithium, sodium or potassium metal yields stable monoanionic radicals n (M = Li, Na, K, 2–4) analogous to the alkali CO 2 − radical, and two-electron alkali metal reduction affords dianionic clusters of the general formula n ( 5–8) with reduced CO 2 units which are structurally analogous to the carbonite anion CO 2 2−. Herein we report the chemical reduction of a cyclic (alkyl)(amino) carbene (CAAC) adduct of CO 2 at room temperature by alkali metals, which results in the formation of CAAC-stabilized alkali CO 2 − and CO 2 2− clusters. As such, examples of stable compounds containing these ions are extremely limited the unadulterated alkali salts of CO 2 ( i.e., MCO 2, M 2CO 2, M = alkali metal) decompose rapidly above 15 K, for example. However, CO 2 anions are highly unstable and difficult to study. The mono- and dianions of CO 2 ( i.e., CO 2 − and CO 2 2−) have been studied for decades as both fundamentally important oxycarbanions (anions containing only C and O atoms) and as critical species in CO 2 reduction and fixation chemistry.
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