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β ‐ Meso Covalently Linked Novel Dipalladium(II) Bis‐Dipyrrin Complex
Author(s) -
Isar Prosenjit,
Chatterjee Tamal,
Ravikanth Mangalampalli
Publication year - 2016
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201600188
Subject(s) - chemistry , ligand (biochemistry) , covalent bond , crystallography , polymer chemistry , stereochemistry , organic chemistry , receptor , biochemistry
β ‐ Meso covalently linked bis‐dipyrrin ligand was synthesized by removing BF 2 unit from β ‐dipyrrinyl BODIPY under mild Lewis acid catalyzed conditions and the resulted bis‐dipyrrin ligand was used to prepare the first example of dipalladium(II) bis‐ dipyrrin complex by treating it with Pd(acac) 2 in CH 2 Cl 2 at reflux temperature. The formation of dipalladium bis‐dipyrrin complex was confirmed by HR‐MS, 1D, 2D NMR spectroscopy and X‐ray crystallography. The crystal structure revealed that both the Pd(II)‐dipyrrin units are nonplanar and makes an angle of ∼59° with each other. The Pd(II) ions were slightly deviated from the dipyrrin plane and each Pd(II) ion was in square planar geometry co‐ordinating to two nitrogen atoms of dipyrromethene unit and two oxygen atoms of acetylacetonate ligand. The preliminary studies indicated that dipalladium bis‐dipyrrin complex can be used as efficient catalyst for Suzuki‐Miyaura cross coupling reactions.