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Sulfur dicyanide is an inorganic compound with the formula S(CN) 2. A white, slightly unstable solid, the compound is mainly of theoretical and fundamental interest given its simplicity. [2]: 8 It is the first member of the dicyanosulfanes S x (CN) 2, which includes thiocyanogen ((SCN) 2) and higher polysulfanes up to S 4 (CN) 2. [3]
[1] [2] [3] Introduced by Gilbert N. Lewis in his 1916 article The Atom and the Molecule, a Lewis structure can be drawn for any covalently bonded molecule, as well as coordination compounds. [ 4 ] Lewis structures extend the concept of the electron dot diagram by adding lines between atoms to represent shared pairs in a chemical bond.
A side of binary carbodiimides, ternary (SrZn(NCN)2) and quaternary ones (Li 2 Sm 2 Sr(NCN) 5) have also been prepared via solid-state metathesis. Dimorphism is observed in inorganic carbodiimide. HgNCN for example can adopt two structures with two different NCN configurations, this means that HgNCN can have either carbodiimide [ 8 ] or ...
Cyanogen is typically generated from cyanide compounds. One laboratory method entails thermal decomposition of mercuric cyanide: . 2 Hg(CN) 2 → (CN) 2 + Hg 2 (CN) 2 Or, one can combine solutions of copper(II) salts (such as copper(II) sulfate) with cyanides; an unstable copper(II) cyanide is formed which rapidly decomposes into copper(I) cyanide and cyanogen.
Lewis structures (or "Lewis dot structures") are flat graphical formulas that show atom connectivity and lone pair or unpaired electrons, but not three-dimensional structure. This notation is mostly used for small molecules. Each line represents the two electrons of a single bond. Two or three parallel lines between pairs of atoms represent ...
Thiocyanogen, (SCN) 2, is a pseudohalogen derived from the pseudohalide thiocyanate, [SCN] −, with behavior intermediate between dibromine and diiodine. [2] This hexatomic compound exhibits C 2 point group symmetry and has the connectivity NCS-SCN.
These species are square-planar and diamagnetic. In addition to [Ni(CN) 4] 4−, nickel also forms [Ni 2 (CN) 6] 4-, with a Ni(I)-Ni(I) bond. The coinage metals form stable dicyanometallates, [Cu(CN) 2] −, [Ag(CN) 2] −, and [Au(CN) 2] −. For heavier metals, other stoichiometries are known such as K 4 Mo(CN) 8 and Potassium heptacyanorhenate.
Among the most toxic cyanides are hydrogen cyanide (HCN), sodium cyanide (NaCN), potassium cyanide (KCN), and calcium cyanide (Ca(CN) 2). The cyanide anion is an inhibitor of the enzyme cytochrome c oxidase (also known as aa 3 ), the fourth complex of the electron transport chain found in the inner membrane of the mitochondria of eukaryotic cells.