In this paper, we report the syntheses, characterization and studies on the inhibition efficiency in mild steel acidic corrosion of 4-fluorobenzaldehyde thiosemicarbazone, Hfbt, 4-fluorobenzaldehyde 2-methylthiosemicarbazone, Me-fbt, and their Zn(II) complexes [Zn(fbt)2] and [Zn(Me-fbt)2]Cl2. The ligands present a good degree of activity that can be assigned to their molecular planar shape and to the presence of electron lone pairs that can interact with metal orbitals. The two zinc complexes present diametrically opposite properties: [Zn(fbt)2] is by far less active than the ligands, while [Zn(Me-fbt)2]Cl2 is the most efficient. Quantum chemical studies were carried out in an attempt to rationalize this behaviour.
Synthesis and characterization of 4-fluorobenzaldehyde thiosemicarbazone derivatives as corrosion inhibitors / Bisceglie, Franco; Del Monte, Giulio; Tarasconi, Pieralberto; Pelosi, Giorgio. - In: INORGANICA CHIMICA ACTA. - ISSN 0020-1693. - 434:(2015), pp. 143-149. [10.1016/j.ica.2015.05.020]
Synthesis and characterization of 4-fluorobenzaldehyde thiosemicarbazone derivatives as corrosion inhibitors
BISCEGLIE, Franco;TARASCONI, Pieralberto;PELOSI, Giorgio
2015-01-01
Abstract
In this paper, we report the syntheses, characterization and studies on the inhibition efficiency in mild steel acidic corrosion of 4-fluorobenzaldehyde thiosemicarbazone, Hfbt, 4-fluorobenzaldehyde 2-methylthiosemicarbazone, Me-fbt, and their Zn(II) complexes [Zn(fbt)2] and [Zn(Me-fbt)2]Cl2. The ligands present a good degree of activity that can be assigned to their molecular planar shape and to the presence of electron lone pairs that can interact with metal orbitals. The two zinc complexes present diametrically opposite properties: [Zn(fbt)2] is by far less active than the ligands, while [Zn(Me-fbt)2]Cl2 is the most efficient. Quantum chemical studies were carried out in an attempt to rationalize this behaviour.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
