scholarly journals Spectrophotometric Study of Adduct Formation Between [Co(Salen)PPh3]ClO4.H2O and [Co(7,7'-Dimethylsalen)PPh3]ClO4.H2O with Amines Donors in Acetonitrile

2010 ◽  
Vol 7 (4) ◽  
pp. 1421-1425
Author(s):  
Mahmood Niad ◽  
Khosro Mohammadi ◽  
Mozaffar Asadi
Keyword(s):  
Schiff Base ◽  
Ionic Strength ◽  
Room Temperature ◽  
Sodium Perchlorate ◽  
Spectrophotometric Study ◽  
Adduct Formation ◽  
Schiff Base Complexes ◽  
Constant Ionic Strength ◽  
Equilibrium Quotient ◽  
Donor And Acceptor

The equilibrium quotient of the adduct formation of [Co(Salen)PPh3]ClO4.H2O and [Co(7,7'-dimethylSalen)PPh3]ClO4.H2O, as acceptor with amines donors are studied by spectrophotometer. Thermodynamics of these pentacoordinate cobalt(III) Schiff-base complexes have been examined withn-butylamine,sec-butylamine,tert-butylamine, benzylamine and diethylamine in constant ionic strength of 0.1 M sodium perchlorate and acetonitrile solvent at room temperature. We aimed to investigate the effects of different electronic and steric situations of donor and acceptor by comparing their equilibrium quotient for any adduct.

Synthesis, characterization, and thermodynamics of tertiary phosphine cobalt(III) Schiff-base complexes

2001 ◽  
Vol 79 (9) ◽  
pp. 1360-1365 ◽  
Author(s):  
Mozaffar Asadi ◽  
Ali Hossein Sarvestani
Keyword(s):  
Schiff Base ◽  
Ionic Strength ◽  
Thermodynamic Parameters ◽  
Stability Constants ◽  
Schiff Base Complex ◽  
Axial Ligand ◽  
Adduct Formation ◽  
Schiff Base Complexes ◽  
Tertiary Phosphine ◽  
The Stability

[Co(5-nitroSalen)(PBu3)]ClO4·H2O and [Co(Salpd)(PBu3)]ClO4·H2O were synthesized and characterized. The stability constants and the thermodynamic parameters were measured spectrophotometrically for 1:1 adduct formation of [CoL(PBu3)]ClO4·H2O, (L = Salen, 5-nitroSalen, Salpd), and [Co(Salen)(PMe2Ph)]ClO4·H2O as acceptors with P(OR)3, (R = Me, Et, i-Pr) as donors, in acetonitrile solvent and in constant ionic strength (I = 0.01 M) and at various temperatures. The trend of the reactivity of cobalt(III) Schiff-base complexes with PBu3 axial ligand toward a given donor is as follows: 5-nitroSalen > Salen > Salpd.Also, the following reactivity trend of the donors toward a given cobalt(III) Schiff-base complex is in the operation: P(O-i-Pr)3 > P(OEt)3 > P(OMe)3.Key words: cobalt(III) Schiff-base complexes, thermodynamic parameters, trialkylphosphite, adduct complexes, stability constants.

Spectrophotometric Study on the Binding of Two Water Soluble Schiff Base Complexes of Mn (III) with ct-DNA

2011 ◽  
Vol 21 (4) ◽  
pp. 1649-1658 ◽  
Author(s):  
Maryam Nejat Dehkordi ◽  
Abdol-Khlegh Bordbar ◽  
Masood Ayatolahi Mehrgardi ◽  
Valiolah Mirkhani
Keyword(s):  
Schiff Base ◽  
Spectrophotometric Study ◽  
Water Soluble ◽  
Schiff Base Complexes ◽  
Ct Dna

Spectrophotometric study of the equilibria between nickel(II) Schiff base complexes and ammonium-like cations or sodium tetraphenylborate

1989 ◽  
Vol 28 (18) ◽  
pp. 3552-3555 ◽  
Author(s):  
Ambrogio Giacomelli ◽  
Taddeo Rotunno ◽  
Lucio Senatore ◽  
Roberta Settambolo
Keyword(s):  
Schiff Base ◽  
Spectrophotometric Study ◽  
Schiff Base Complexes ◽  
Sodium Tetraphenylborate
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