70546-97-3Relevant academic research and scientific papers
Method of manufacturing polyhydroxyalkanoic benzenedisulfonic polyhydroxyalkanoic benzenedisulfonic barium and method of manufacturing
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Paragraph 0050-0051, (2017/01/02)
PROBLEM TO BE SOLVED: To provide a method for producing a high-purity barium alkanedisulfonate at high yield.SOLUTION: The method for producing the barium alkanedisulfonate represented by formula (3) includes a process 1 of reacting a dihaloalkane compound and sodium sulfite and/or potassium sulfite in a reaction solvent to obtain a reaction liquid containing an alkanedisulfonate represented by formula (2), and a process 2 of adding an acid to the reaction liquid and then adding a barium salt to react. In the formulae (2) and (3), Rand Rare each H, 1-5C alkyl, 1-5C alkoxy, 1-5C fluoroalkyl or 1-5C polyfluoroalkyl; n is an integer of 1 to 6, and when n is 2 to 6, Rs and Rs of respective n-pieces may be the same or different; and M is Na or K.
Secondary Reactions of Sulfenes from Sulfonyl Chlorides and Tertiary Amines, 3. - Crystal Structure Analysis of Bis(trimethylammoniosulfonyl)methanide Tetraphenylborate - n-?*-Interactions (Hyperconjugation and Homohyperconjugation) in Sulfene-Amine S,N-Adducts
Opitz, Guenter,Wiehn, Walter,Ziegler, Manfred L.,Nuber, Bernhard
, p. 1621 - 1626 (2007/10/02)
Bis(trimethylammoniosulfonyl)methanide chloride (3b) could be obtained in 97percent yield by reaction of methanedisulfonyl dichloride (5) with three equivalents of trimethylamine.X-ray analysis of the tetraphenylborate 3c reveals that the conformation of the cation is determined by nC-?*S-N interactions (negative hyperconjugation) and by nC-?*N-C interactions (negative homohyperconjugation).These effects were deduced from alterations of the bond lengths within the S-N-C chains which are coplanar to the occupied pz orbital at the central C atom.Comparison with known crystal structure data shows, that sulfene-amine S,N-adducts generally have the zwitterionic ammoniosulfonylmethanide structure 3, stabilized by nC-?* interactions. Key Words: Bis(trimethylammoniosulfonyl)methanide tetraphenylborate / Sulfene-amine adducts / Hyperconjugation, negative / Homohyperconjugation, negative / n-?* interactions
