Abstractmagnified imageNew bromothallate(III) complexes have been synthesized using eleven organoammonium cations related to others employed previously. The crystal structure determinations of eight of these have been performed. The diethylenetriammonium cation yields the first compound containing [TlBr6]3− as the only anionic species, while the N,N,N′,N″,N″‐pentamethyldiethylenetriammonium cation gave a mixed salt containing discrete [TlBr4]− and Br− ions, in which the [TlBr4]− unit does not participate in hydrogen bonding. In the pyrazolinium mixed salt, both the [TlBr4]− and Br− ions are hydrogen‐bonded to cations and disposed in an arrangement similar to a [Tl2Br9]3− unit. The triethylenediammonium dication gives a compound in which a highly distorted trigonal bipyramidal [TlBr5]2− system is present, while the 1‐benzylpiperazinium compound also shows a very weak [TlBr4]− and Br− interaction. Six other monovalent cations provided [TlBr4]− derivatives that were characterized either crystallographically or via their Raman spectra. In a comprehensive structural summary, the various interactions between cations and bromothallate(III) anionic groupings, giving rise to the structural diversity described in this and previous reports, are discussed in terms of the cation charge, quaternization and steric influence, NH⋅⋅⋅Br hydrogen bonding, and secondary bonds present in the compounds.
Protic ionic liquids tailored by different cationic structures for efficient chemical fixation of diluted and waste CO<sub>2</sub> into cyclic carbonates
PRODUCTION PROCESS FOR FLUOROSULFONYLIMIDE AMMONIUM SALT
申请人:Tsubokura Shiro
公开号:US20130331609A1
公开(公告)日:2013-12-12
A compound [II] such as ammonium N,N-di(fluorosulfonyl)imide is obtained by reacting a compound [I] such as N,N-di(chlorosulfonyl)imide and NH
4
F (HF)
p
. A compound [IV] such as an N,N-di(fluorosulfonyl)imide alkali metal salt is obtained by reacting the obtained compound [II] and an alkali metal compound or the like.
The present invention relates to novel base stable ionic liquids and uses thereof as solvents in chemical reactions, especially base catalysed chemical reactions and reactions comprising the use of strong basis.
Bromide and iodide anions switch hydrogen-bonding patterns in otherwise isostructural dimethanol solvates N-methyl-1,4-diazabicyclo[2.2.2]octanium bromide (dabcoCH3Br·2CH3OH) and analogous iodide (dabcoCH3I·2CH3OH), both synthesized in the high-pressure version of the Menshutkin reaction at 1.2 and 2.4 GPa, respectively. The magnitudes of the high pressure triggering these reactions correspond to identical molecular volumes of both solvates.
Halocuprate(<scp>i</scp>) zigzag chain structures with N-methylated DABCO cations – bright metal-centered luminescence and thermally activated color shifts
作者:Sebastian Maderlehner、Markus J. Leitl、Hartmut Yersin、Arno Pfitzner
DOI:10.1039/c5dt02709h
日期:——
93(2)°, V = 1533(1) Å3, Z = 4, space group P21/n (no. 14) and 2 with a = 15.826(9) Å, b = 9.476(5) Å, c = 22.90(2) Å, β = 90.56(5)°, V = 3434(5) Å3, Z = 8, space group P21 (no. 4), respectively (lattice constants refined from powder diffraction data measured at 293 K). The cations in both compounds are formed by in situ N-methylation of DABCOH22+ cations by methanol in a SN2 reaction. Both compounds contain