IR- and UV-Spectral Study of Palladium(II) Complexes with 2-Aminopyridine Obtained in Sulphuric Acid and Alkaline Solutions

When obtained in sulphuric acid medium sulphato-2-aminopyridine-palladium (II) complex has a polynuclear structure, with a bridging coordination of both the sulphato-group and 2-aminopyridine. The complex keeps its polynuclear structure in alkaline solution, in which the substitution of sulphato ions by hydroxylic groups yields hydroxo-2-aminopyridine-palladium (II). The compounds discussed are the main components of activators used in currentless metallization of nonconducting surfaces.     

Spectral Properties and Molecular Structure of 4-Aryl-3-cyano-1,1-diphenyl-2-azabutadienes

A detailed UV-VIS, IR, ¹H and ¹³C NMR spectroscopic study of (Z)-and (E)-isomers of a series of the title compounds afforded a number of spectral criteria, which could be reliably used for configurational assignment of other compounds of similar type.     

Constructing regularization methods in the spaces of differentiable functions

The method of finding approximations to a solution and its derivatives is constructed for a certain class of integral Volterra equations of the first kind. Matching conditions for the regularization parameter and the error in the initial data are presented. Sharp (in terms of order) error estimates are obtained for approximate solutions on certain compact classes.     

Heat capacities and thermodynamic functions of the tellurates(IV) of zinc and cadmium

The temperature dependencies of the molar heat capacities of ZnTeO₃, Zn₂Te₃O₈, CdTeO₃ and CdTe₂O₅ are determined. The experimental data are statistically processed using the least squares method to determine the parameters in the equations for the corresponding compounds: C_p,m=a+b(T/K)-c(T/K)^-2. These equations and the standard molar entropies are used to determine Δ^T₀S⁰_m, Δ^T_TH⁰_m and (Φ⁰_m+Δ^T,₀H⁰_m/T) for T'=298.15 K.