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Cyanamide is the name for a functional group with the formula R 1 R 2 N−C≡N where R 1 and R 2 can be a variety of groups. These compounds are called cyanamides . One example is naphthylcyanamide, C 10 H 7 N(CH 3 )CN, which has been produced by the von Braun reaction , [ 19 ] a general method for the conversion of tertiary amines to ...
The Lewis diagram for NCN 2-showing the symmetric carbodiimide form (1) and the asymmetric cyanamide form (2). Inorganic carbodiimides (or cyanamides depending on the NCN 2-form) design a family of compounds containing the carbodiimide (or cyanamide) anion NCN 2-bonded to an inorganic group such as a metal.
Lewis structure of a water molecule. Lewis structures – also called Lewis dot formulas, Lewis dot structures, electron dot structures, or Lewis electron dot structures (LEDs) – are diagrams that show the bonding between atoms of a molecule, as well as the lone pairs of electrons that may exist in the molecule.
Calcium cyanamide, also known as Calcium carbondiamide, Calcium cyan-2°-amide or Calcium cyanonitride is the inorganic compound with the formula CaCN 2. It is the calcium salt of the cyanamide (CN 2− 2) anion. This chemical is used as fertilizer [3] and is commercially known as nitrolime.
Its main use industrially is in the production of acetylene and calcium cyanamide. [ 3 ] The pure material is colorless, while pieces of technical-grade calcium carbide are grey or brown and consist of about 80–85% of CaC 2 (the rest is CaO ( calcium oxide ), Ca 3 P 2 ( calcium phosphide ), CaS ( calcium sulfide ), Ca 3 N 2 ( calcium nitride ...
At temperatures around 600 °C, calcium cyanide converts to calcium cyanamide: [4] [5] Ca(CN) 2 → CaCN 2 + C. It is suspected that this reaction is one step in the conversion of calcium carbide with nitrogen gas. The ratio of calcium cyanide to calcium cyanamide is sensitive to the presence of alkali metal halides, such as sodium chloride.
Graphitic carbon nitride can be made by polymerization of cyanamide, dicyandiamide or melamine. The firstly formed polymeric C 3 N 4 structure, melon, with pendant amino groups, is a highly ordered polymer. Further reaction leads to more condensed and less defective C 3 N 4 species, based on tri-s-triazine (C 6 N 7) units as elementary building ...
For example, in the formation of an ammonium ion from ammonia and hydrogen the ammonia molecule donates a pair of electrons to the proton; [11] the identity of the electrons is lost in the ammonium ion that is formed. Nevertheless, Lewis suggested that an electron-pair donor be classified as a base and an electron-pair acceptor be classified as ...