Intramolecularly H-bonded bis-benzimidazole diamide ligand and its Mn(II) complexes: Synthesis, spectral and electrochemical studies

Content Provider	Semantic Scholar
Author	Mohapatra, Subash Chandra Bakshi, Ruchi Hundal, Maninder Singh Mathur, Pavan
Copyright Year	2010
Abstract	New manganese(II) complexes with a diamide ligand N,N'-bis(benzimidazolyl-2yl)(methyl)pentane diamide have been synthesized with the general composition [Mn(GBGA) 2 X 2 ] where X = Cl - , CH 3 COO - , SCN - , ClO 4 - . The ligand has been structurally characterized and has been found to adopt a helical structure stabilized by strong intramolecular and intermolecular H-bonding. The ligand crystallizes in the monoclinic space group P2 l/c with unit cell dimensions: a = 14.180(5) A, b = 8.454(5) A, c = 19.353(5) A, α= 90.000°, β=108.232(5)°, γ = 90.000° and Z=2. X-band solid state EPR spectra for the Mn(II) complexes have been obtained indicating weakly distorted octahedral complexes with D ranging between 0.05-0.14 cm -1 . Cyclic votammograms display a quasi-reversible redox wave. The E 1/2 values follow the order: SCN - < CH 3 COO - < Cl ― ∼ ClO 4 ― . Quenching of superoxide anion is studied by cyclic voltammetry. From the plot of total peak current versus concentration of the added Mn(II) catalysts, the break points and turnover of catalyst have been evaluated.
Starting Page	159
Ending Page	166
Page Count	8
File Format	PDF HTM / HTML
Volume Number	49
Alternate Webpage(s)	http://nopr.niscair.res.in/bitstream/123456789/7347/1/IJCA%2049A(2)%20159-166.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article