Structural Investigation of Di-μ-chloro-bis[saccharinatopyridinemercury(II)] by X-ray Diffraction and FT IR Spectroscopy

The solid state structure of C12H9ClHgN2O3S2 was determined and the appropriate assignment of the CO and SO2 stretching vibrations in the FT IR spectrum was made. Two monomeric chlorosaccharinatopyridinemercury(II) moieties are joined together forming a di-chloro bridged dimmer by an inversion centre operation. The mercury atom is coordinated with two bridging chlorine and the pyridine and saccharinato nitrogen atoms in the shape of a heavily distorted tetrahedron. There is a significant difference between Hg1–Cl1 2.533(2) Å and Hg1–Cl1i 2.715(2) Å distances as well as between Hg1–N11 2.106(7) Å and Hg1–N21 2.209(7) Å bond lengths. The valence bond angles at the metal atom deviate significantly from the standard tetrahedral value, ranging from 86.23(7)° for Cl1–Hg1–Cl1i to 131.5(3)° for N11–Hg1–N21. Discrete molecules are linked together by weak intermolecular C–H⋅⋅⋅O attractions at distances less than 3.5 Å

Electrochemistry of saccharinate anion at liquid interfaces

International audienceElectrochemistry of saccharinate anion (sacc−) is studied at the liquid water|nitrobenzene (w|nb) interface by means of three-phase electrodes. Saccharinate anion can be effectively transferred across w|nb interface driven by the redox transformation of the lutetium bis(tetra-tert-butylphthalocyaninato), with a standard Gibbs energy of transfer from water to nitrobenzene of 20.17 kJ mol−1. The kinetics of transfer is estimated applying the quasireversible maximum. In addition, the influence of sacc− on the thermodynamics and kinetics of the alkali metal cations transfer is discussed