# Studies on electrchemical reduction of Cd(II) complexes with alkyl thioureas

Socha, A. and Chruscinska, Elzbieta Lodyga (1993) Studies on electrchemical reduction of Cd(II) complexes with alkyl thioureas. Accademia Peloritana dei Pericolanti, Classe di Scienze FF. MM. NN., LXXI. pp. 279-290.

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atti_3_1993_279.pdf - Submitted Version

The formation of Cd(II) complexes with alkyl thioureas $(Tu=H_2NCSNH_2, CH_3Tu, C_2H_5Tu, C_4H_9Tu)$ has been studied in aqueous solution. Basing on CV and polarographic results the 2-electrons reversible mechanism was assigned. With the aid of POLAG (nonlinear least squares iterative program) the overall stability constants $(log \beta\ _n=1-4)$ were estimated. The values of LUMO energy, heat of formation and electrostatic potential minima were obtained on the basis of quantum-chemical calculations. They confirmed the ealier established stability sequence of Cd(II) complexes with alkyl thioureas, namely $Tu<CH_3Tu<C_2H_5Tu<C_4H_9Tu$. The estimation of $E _\frac {1}{2}$ for 1:1 and 1:4 complexes was made by linear regression.