Separazione di isomeri configurazionali di leganti organici per formazione di complessi

The new ligand $(CH_3)_2As-C_6H_4-As(CH_3)-C_6H_4-As(CH_3)-C_6H_4-As(CH_3)_2$ has been sinthesized. Meso and racemate forms of the ligand have been separated by moy of the Palladium(II) complexes. The isomeric forms isolated react mantaining the configuration at the arsenic atom

Il sistema UO_2^2^+ -tropolone-nota II. Costanti relative di stabilità di addotti con leganti neutri in benzene

The relative stability constants for the equilibrium (UO_2T_2)_2 + 2L \rightlefthapoons \ 2UO_2T_2L have been determined in benzene at 25°C (HT = tropolone; L = $Ph_3AsO$, $Ph_3PO$, PyNO, DMSO, Py and cyclopentanone. The sequence of values obtained can be regarded as an index of the ability of the neutral lingads to coordinate at the common substrate

Studio delle reazioni tra alogeno derivati ciclopentadienilici dell'uranio (IV) e sodio boroidruro

The reaction between $Cp_2UCl_2$ and $NaBH_4$ has been studied, The U^I^I^I complex obtained has been characterized by in and n.m.r spectroscopy, and elemental analysis

Reazione dello ione uranile con leganti anionici polidentati. Un rapido metodo gravimetrico per la determinazione dell'uranio

In a previously published note $I^1$ anionic complexes of the type $[UO_2L_2]^2$ $(LH_2 = 2,6$ -dipicolinic acid) have been described. We report now data on the solubility of salts derived from the previous anionic complexes. The salt $[U0_2L_2]$ $(Ph_4As)_2$. $2H_2O$ is particulariy suitable br rapid gravimetric determination of uranium

The vertical distribution of the Cs-137 derived from Chernobyl fall-out in the uppermost Sphagnum layer of two peatlands in the southern Alps (Italy).

Analysis of the vertical distribution of Chernobyl fallout in recent peat layers