556-65-0Relevant articles and documents
Synthesis of new electrolytes in solutions with dc current
Oshurkova,Nesterov
, p. 1605 - 1609 (2005)
Conditions under which new pure electrolyte solutions can be obtained by passing dc electriccurrent through contacting solutions with four different ions were considered. Electrolytes were synthesized in capillary columns by various procedures.
Complexation and Solvent Extraction of Lithium Salts with 2,3,6,7,9,10-Hexahydro-5H-1,4,8,11-benzotetraoxacyclotridecin (Benzo-13-crown-4)
Olsher, Uriel,Jagur-Grodzinski, Joseph
, p. 501 - 505 (1981)
Solubility measurements were conducted in order to compare the affinity towards lithium salts of several 12- to 16-membered ring 'crown' ethers.The 13-membered ring benzo-13-crown-4 (L1) was found to be the most effective complexing agent for lithium among the investigated macrocyclic ethers.The effect of counter ions on the solubility was found to be OH(1-) 1 extract lithium salts selectively from aqueous solutions.In the latter solvent selectivity factor γ(Li(1+)/M(n+)) was found to be 2.5, 44, 216, and 355 for Na(1+), K(1+), Mg(2+), and Ca(2+) respectively.Hydrogen-1 n.m.r. measurements for the solutions of the lithium complexes of L1 indicate that a planar conformation of the quadridentate macrocyclic ring seems to be favoured in the complexed L1. The 1 : 1 complexes have been found to be dominant in all investigated solvent systems.However, in methylene chloride and in nitromethane the 2 : 1 'sandwich' type complexes could also be detected.The stability constants of the complexes were found to increase in order of decreasing donicity of the solvent media.
Structure of the ambient temperature alkali metal molten salt AlCl3/LiSCN
Lee, Yi-Chia,Price, David L.,Curtiss, Larry A.,Ratner, Mark A.,Shriver, Duward F.
, p. 4591 - 4594 (2001)
Neutron diffraction was used for the investigation of structure of the ambient temperature alkali metal molten salt system AlCl3/LiSCN. Result showed that Aluminum atom maintained a tetrahedral coordination environment and the SCN- anion coordinates to the Aluminium through the Nitrogen ends. The bond distances obtained from neutron diffraction matched with the calculation results and showed AlCl3NCS- was more stable than its isomer AlCl3SCN-.
Complexation of phosphoryl-containing mono-, bi- and tri-podands with alkali cations in acetonitrile. Structure of the complexes and binding selectivity
Solov'ev, Vitaly P.,Baulin, Vladimir E.,Strakhova, Nadezhda N.,Kazachenko, Vladimir P.,Belsky, Vitaly K.,Varnek, Alexandre A.,Volkova, Tatiana A.,Wipff, Georges
, p. 1489 - 1498 (2007/10/03)
We present experimental and theoretical studies on new ionophores (L) which possess a high complexation ability for Li+or Na+cations. Four tri-podands(R1-O-C2H4-)3N[R 1 = -CH2-P(O)Ph2(P1), -C2H4-P(O)Ph2 (P2), -o-C6H4P(O)Ph2 (P3) and -o-C6H4-CH2-P(O)Ph2 (P4)], one bi-podand (R2-O-C2H4-)2N-CH3 [R2 = -o-C6H4-CH2-P(O)Ph2 (P5)] and one mono-podand [R2-O-(CH2-CH2-O)3R2 (P6)] containing phosphine oxide terminal groups have been synthesised. Stability constants, enthalpies and entropies of their complexation with lithium, sodium and potassium thiocyanates have been determined in acetonitrile at 298 K by a calorimetric titration technique. We find that tri-podands form a variety of complexes [(M+)3L, (M+)2L, M+L and M+L2)], whereas the bi- and mono-podand form only M+L complexes with Li+ and Na+, and M+L and M+L2 complexes with K+. Formation of poly-nuclear (M+)nL complexes of tri-podands in solution has been confirmed by electro-spray mass spectrometry. At relatively small concentrations of the ligand (CL0)S P1 binds Na+ much better than Li+, whereas P4 and P5 display a remarkable Li+/Na+ selectivity; at large CL0 the complexation selectivity decreases. X-Ray diffraction studies performed on monocrystals of complexes of NaNCS with tri-podands P2 and P3 show that Na+ is encapsulated inside a 'basket-like' pseudocavity, coordinating all donor atoms of the tri-podand. Molecular dynamics simulations on P2, P3 and P4 and on their 1:1 complexes with M+ in acetonitrile solution suggest that the structures of M+L complexes in solution are similar to those found for P2 and P3 complexes in the solid state.
