A recently developed ab initio MO theory including solvent effects has been applied to a typical cation-anion reaction, the S N 2 reaction of the trimethylsulfonium cation with the chloride anion. In the gas phase, the trimethylsulfonium and chloride ions are unstabilized, and the reaction is...
The cation exchange to convert calcite to cerussite or lead carbonate (PbCO3), the first step in the two-step ion exchange process, was already carried out in a previous study [8]. The study was primarily aimed at the sequestration of Pb2+ into bulk calcite through dissolution/ ...
Then, the surface termination generated by cation in the valence band and anion in conduction band behave differently in the formation of Fermi arc on the topological surface state as shown schematically in Fig. 2(c). For instance, in Co3Sn2S2, there are two possible surface termination ways...
The structure nucleophiles in tlie transition state (a result oppcslte of the transition state for this reaction is also very to that pred~cted by tlle Solcation rule for S,2 sensitive to a change in solvent. A similar variation reactions) and a change in the trailsitloll state might ...
ther puri fi cation.E lement al analy sis was carried out o n a M 0 D 1 1 0 6 elemental analyzer.F T —IR spectr a w ere record ed w ith a N ico let M ag na—-IR 5 50 sp ec·· tr ometer in dry K B r pellet s in the 4000 ~ 4 00 cm- ’ ran ge. 2.2 ...
The high level of intrinsic anion disorder is consistent with expectations based on the cation radius ratio ( ja:math ) in A 2 B 2 O 7 pyrochlore compounds. These measurements were extended to the solid solution Gd 2 (Ti 1 x Sn x ) 2 O 7 and Gd 2 (Zr 1 x Sn x ) 2 O 7 ....
Compounds 1-3 are isostructural and consist of a binuclear lanthanide(III) complex cation [Ln2(en)6( 2-OH)2]4+ and a dimeric anion [Sn2E6]4- (E = S, Se). The anion is composed of two SnE4 tetrahedra sharing a common edge with C 2h symmetry. All the lanthanide(III) atoms are...
Compounds 1-3 are isostructural and consist of a binuclear lanthanide(III) complex cation [Ln2(en)6(μ2-OH)2]4+ and a dimeric anion [Sn2E6]4 (E = S, Se). The anion is composed of two SnE4 tetrahedra sharing a common edge with C2h symmetry. All the lanthanide(III) atoms are ...
The nine-coordinate [Nd(trien) 3 ] 3+ complex cation formed in situ acts as the counter ion to the [Sn 2 S 6 ] 4 anion. The [Nd(dien) 3 ] 3+ , [Sn 2 S 6 ] 4 and Cl – (or SH – ) ions form a 3-dimensional network structure through the N–H···S and N–H·...