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Synthesis, Structure and Properties of the First Examples of Hexacoordinate Sn IV Complexes of Pyrrolyldipyrrins
Author(s) -
Sharma Ritambhara,
Ravikanth Mangalampalli
Publication year - 2017
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201601179
Subject(s) - hexacoordinate , chemistry , ligand (biochemistry) , chlorobenzene , crystallography , coordination complex , metal , medicinal chemistry , organic chemistry , catalysis , silicon , biochemistry , receptor
α‐Pyrrolyldipyrrin was used as a tridentate ligand to form the first examples of hexacoordinate Sn IV complexes under simple reaction conditions. Prior to this report, no literature precedence can be found for hexacoordinate metal complexes of the pyrrolyldipyrrin ligand. The Sn IV complexes were prepared by treating the appropriate meso ‐aryl‐substituted α‐pyrroyldipyrrin with SnCl 2 in chlorobenzene heated at reflux, followed by silica‐gel column chromatographic purification. The Sn IV complexes were characterised by HRMS, 1D and 2D NMR spectroscopy and X‐ray crystallography. The X‐ray structure revealed that the two pyrrolyldipyrrin ligands are perpendicular to each other and the pyrrolyldipyrrin ligand forms five‐ and six‐membered rings upon coordination with the Sn IV ion. The Sn IV complexes absorb strongly in the region 500–700 nm and are stable under electrochemical conditions.