The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Cation Catalysis. II》. Authors are Holmberg, Bror.The article about the compound:2,3-Dibromopropionic acidcas:600-05-5,SMILESS:O=C(O)C(Br)CBr).Reference of 2,3-Dibromopropionic acid. Through the article, more information about this compound (cas:600-05-5) is conveyed.
The alk. decompose of CH2BrCHBrCOOH is a bimol. reaction (OC-OCHBrCH2Br + O-H = OCO-CBR : CH2 + B-r + H2O) and the coefficient of velocity is proportional to the 8th root of the concentrate of the cation. A 25° the constants are: CNa 12.14, CK 11.68, CCa 17.92, CBa 16.68. If 2 ions are present the catalytic effect is additive: C = 8√Ck8[K’] + CNa8 [Na’]. Na+ with Ba++ gives a velocity smaller than this. α,β-Dibromobutyric acid: The decompose is a bimol. reaction, (OCOCHBrCHBrCH3 + OH ⇄ OC-OCBR : CHCH3 + B-r + H2O) and is somewhat slower than for the corresponding propionic acid. As before, the constant of velocity is proportional to the 8th root of the concentrate of the ion. At 25° CNa = 0.206, CK 0.218, CCa 0.319 and CBa 0.302. When K+ and Na+ are present together the velocity constant is additive, but in case of Na+ and Ba++ the action is slower. γ-Valerolactone: According to P. Henry (Ibid., 10, 96 (1892)) the decomposes of this lactone and butyrolactone are independent of the nature of the base; this is confirmed by H. α-Bromobutyric acid: The decompose of the Na salt in dilute H2O solution is not a pure monomol. reaction, but the coefficient of velocity becomes similar as the reaction proceeds, which is difficult to understand, since the solution at the same time becomes more acid. When an equivalent of base acts upon an equivalent of acid the reaction is nearly monomol. with a slight tendency for the velocity constant to become smaller as the reaction proceeds. When 2 equivalent bases act on 1 equivalent acid the action is bimol. The presence of NaBr has no influence in the alk. decompose of α-bromobutyric acid, and the cations, Na, K, Ca and Ba have little influence;Ba has no greater influence than Na.
《Cation Catalysis. II》 provides a strategy for the preparation of materials with excellent comprehensive properties, which is conducive to broaden the application field of this compound(2,3-Dibromopropionic acid)Reference of 2,3-Dibromopropionic acid.
Reference:
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