Premium
Synthesis and Structure of Solvated Protons Incorporating Weakly Coordinating Anions. Precursors of Superacids †
Author(s) -
Tsang ChiWing,
Yang QingChuan,
Mak C. W. Thomas,
Xie ZuoWei
Publication year - 2002
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.20020201116
Subject(s) - chemistry , carborane , molecule , salt (chemistry) , solvent , proton , reagent , crystal structure , inorganic chemistry , metathesis , medicinal chemistry , crystallography , organic chemistry , polymerization , physics , quantum mechanics , polymer
Six new solvated proton salts of highly halogenated carborane anions, [H(solvent),] [carborane] (carborane = 1‐R‐CB 11 ‐Y 5 X 6 ‐(R=H, Me; X, Y=CI, Br, I), 1‐H‐CB 9 Br 9 − ) were prepared from the salt metathesis reaction of Ag(carborane) and HO in high yields. Single‐crystal X‐ray analyses show that they are all discrete molecules in the solid‐state. The number of the solvated molecules surrounding H + ion can not be determined with the knowledge of the size and substituents of the carborane anions. These salts provide convenient weighable sources of Brønsted acid reagents having a wide range of acidities and good thermal stabilities. TGA results indicate that the solvated molecules (water or organic molecules) in the cations [H(solvent ) n ] + can be removed under high temperature and high vacuum conditions to give superacidic materials H(carborane) which can protonate olefin.