Transition-metal chemistry of oxime-containing ligands—XXVII. Five- and six-coordinate complexes of iron(II) and iron(III) with 2,6-diacetylpyridine

Iron(II) and iron(III) complexes of 2,6-diacetylpyridine dioxime (H₂dapd) have been prepared and their electronic and structural properties investi     

Binding energy of finite nuclei in Jastrow-Factor-Cluster method with applications in helium

A general expression for the binding energy of finite nuclei in the Jastrow-Factor-Cluster method is developed upto the three-body cluster term with centre of mass correction. It is applied in massA=3 and 4 with the standard Chakkalakal function and the average Pauli condition. Compared to the previous work of Afnan (1969) better saturation properties are obtained for two- and three-body truncation. Convergence is also better.     

Tetrahedral and octahedral coordination for cobalt(II) complexes of N-isopropyl-2-pyrrolidinone

Complexes of the formulas [Co(NIPP)₄](ClO₄)₂ and [Co(NIPP)₆](ClO₄)₂ have been synthesized and isolated (NIPP = N-isopropyl-2-pyrrolidinone). IR spectra and conductance data are presented as proof that perchlorate coordination in [Co(NIPP)₄](ClO₄)₂ does not occur. Vibrational spectra indicate that coordination occurs through the NIPP carbonyl oxygen for both complexes. Spectral parameters obtained from the electronic spectra and magnetic moments indicate tetrahedral and octahedral coordination for [Co(NIPP)₄](ClO₄)₂ and [Co(NIPP)₆](ClO₄)₂, respectively. The powder X-ray diffraction data appear to support the assignments of these two geometries. The crystal-field prediction that Δ(T_d)/Δ(O_h) = 0.44 is in reasonably good agreement with the experimental results.     

Multi-residue analytical methods using LC-tandem MS for the determination of pharmaceuticals in environmental and wastewater samples: a review

Multi-residue analytical methodologies are becoming the preferred and required tools against single group analysis, as they provide wider knowledge about the occurrence of pharmaceuticals in the environment necessary for further study of their removal, partition and ultimate fate. However, simultaneous analysis of compounds from different groups with quite different physico-chemical characteristics requires a compromise in the selection of experimental conditions, which in some cases are not the best conditions for all the analytes studied. In this article, an overview of analytical methodologies focusing on the simultaneous determination of acidic, neutral and basic compounds belonging to different therapeutical classes is presented. The state-of-the-art of LC-MS/MS for multi-class analysis is reviewed, highlighting the specific requirements for such analysis.     

Decomposition and reconstruction of multidimensional signals by radial functions with tension parameters

The aim of the paper is to construct a multiresolution analysis of L²(IR^d) based on generalized kernels which are fundamental solutions of differential operators of the form \(\boldsymbol {\prod }_{\ell =?1}^{m}(-{\Delta }+\kappa _{\ell }^{2}\,I)\). We study its properties and provide a set of pre-wavelets associated with it, as well as the filters which are indispensable to perform decomposition and reconstruction of a given signal, being very useful in applied problems thanks to the presence of the tension parameters κ_?.