Cinetica di deposizione del rame su elettrodo di cadmio da soluzioni di Cu++ in acido perclorico

The deposition kinetics of copper from perchloric solutions on Cd electrode have been studied by polarographic technique. The copper ions depletion follows a first order law: the kinetics constant is 0,5.10^-^5 moles.sec^-^1.cm^-^2 for Cu deposition on fresh Cd electrodes, and 1.10^-^5 moles.sec^-^1.cm^-^2 for deposition and previously corroded Cd electrodes

Complessi molecolari di trialogenuri di antimonio con benzofenone e suoi derivati

The solid complexes of $SbX_3$ (X=Cl,Br) with benzophenone, 4-chlorobenzo- phenone, 4-bromo-benzophenone, 4-amino-benzophenone have been obtained and characterized. The stability constants in dichloromethane solutions have been evaluated by means of UV-Visible spectrophotometric measurements using the method of Benesi-Hildebrand. From the infrared measurements, a type “n” bond metal-nitrogen was etablished to exist in the complexes $2SbCl_3$:4-amino-benzophenone and $SbBr_3$:4-amino-benzophenone. In all the remaining complexes the I. R. data suggest a $\pi \$ coordination metal-aromatic ring