Metalation of dipyrromethene (dipyrrin) (la-c) with Ni(OAc)(2) provides Ni-dipyrrole complexes (NiL2) (2a-c) in 37-47% yields. The complexes were characterized by mass spectrometry and UV-Vis absorption, H-1 NMR spectroscopy and single crystal X-ray. In CH2Cl2, each compound undergoes two reversible one-electron reductions and one irreversible oxidation wave. In DMF, complexes 2a-c also undergoes two reversible one-electron reductions but with three irreversible oxidation waves were observed. The effect of substituents and solvent on redox potentials is discussed. (C) 2015 Elsevier Ltd. All rights reserved.
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Sri Ramakrishna Mission Vidyalaya Coll Arts & Sci, Post Grad & Res Dept Chem, Coimbatore 641020, Tamil Nadu, IndiaSri Ramakrishna Mission Vidyalaya Coll Arts & Sci, Post Grad & Res Dept Chem, Coimbatore 641020, Tamil Nadu, India
Raja, Gunasekaran
Sathya, Nagarajan
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Sri Ramakrishna Mission Vidyalaya Coll Arts & Sci, Post Grad & Res Dept Chem, Coimbatore 641020, Tamil Nadu, IndiaSri Ramakrishna Mission Vidyalaya Coll Arts & Sci, Post Grad & Res Dept Chem, Coimbatore 641020, Tamil Nadu, India
Sathya, Nagarajan
Jayabalakrishnan, Chinnasamy
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Sri Ramakrishna Mission Vidyalaya Coll Arts & Sci, Post Grad & Res Dept Chem, Coimbatore 641020, Tamil Nadu, IndiaSri Ramakrishna Mission Vidyalaya Coll Arts & Sci, Post Grad & Res Dept Chem, Coimbatore 641020, Tamil Nadu, India
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Zhejiang Univ Technol, Inst Fine Chem Ind, Hangzhou 310014, Zhejiang, Peoples R ChinaZhejiang Univ Technol, Inst Fine Chem Ind, Hangzhou 310014, Zhejiang, Peoples R China
Cai, Zhibin
Zhou, Mao
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Hangzhou Sharply Pharmaceut Inst Co Ltd, Hangzhou 310052, Zhejiang, Peoples R ChinaZhejiang Univ Technol, Inst Fine Chem Ind, Hangzhou 310014, Zhejiang, Peoples R China
Zhou, Mao
Gao, Jianrong
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Zhejiang Univ Technol, Inst Fine Chem Ind, Hangzhou 310014, Zhejiang, Peoples R ChinaZhejiang Univ Technol, Inst Fine Chem Ind, Hangzhou 310014, Zhejiang, Peoples R China