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Carbones possess high-energy orbitals with both σ- and π-symmetry, making them strong Lewis bases and strong π-backdonor substituents. [2] Carbones possess high proton affinities [3] [4] and are strong nucleophiles which allows them to function as ligands in a variety of main group and transition metal complexes. [5]
Carbon is the fourth most abundant chemical element in the observable universe by mass after hydrogen, helium, and oxygen. Carbon is abundant in the Sun, stars, comets, and in the atmospheres of most planets. [52] Some meteorites contain microscopic diamonds that were formed when the Solar System was still a protoplanetary disk. [53]
Carbon compounds are defined as chemical substances containing carbon. [ 1 ] [ 2 ] More compounds of carbon exist than any other chemical element except for hydrogen . Organic carbon compounds are far more numerous than inorganic carbon compounds.
The following is a list of straight-chain alkanes, the total number of isomers of each (including branched chains), and their common names, sorted by number of carbon atoms. [ 1 ] [ 2 ] Number of C atoms
The carbon atoms are in the same locations as the silicon and aluminum atoms of the mineral sodalite. The space group, I 4 3m, is the same as the fully expanded form of sodalite would have if sodalite had just silicon or just aluminum. [30] bct-carbon: Body-centered tetragonal carbon was proposed by theorists in 2010. [31] [32]
Carbon's widespread abundance, its ability to form stable bonds with numerous other elements, and its unusual ability to form polymers at the temperatures commonly encountered on Earth enables it to serve as a common element of all known living organisms. In a 2018 study, carbon was found to compose approximately 550 billion tons of all life on ...
It is a major factor in climate change and the long-term carbon cycle, due to the large number of marine organisms (especially coral) which are made of calcium carbonate. Increased solubility of carbonate through increased temperatures results in lower production of marine calcite and increased concentration of atmospheric carbon dioxide. This ...
Carbon is most commonly used in its amorphous form. In this form, carbon is used for steelmaking, as carbon black, as a filling in tires, in respirators, and as activated charcoal. Carbon is also used in the form of graphite, for example as the lead in pencils. Diamond, another form of carbon, is commonly used in jewelry. [18]