Journal
POLYHEDRON
Volume 28, Issue 16, Pages 3507-3514Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.poly.2009.07.050
Keywords
4,4 '-Methylene-bis (3-hydroxy-2-naphthalene carboxylic acid); Dimeric Ti(IV) complex; Octahedral Ti(IV) center; Helical structure
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Funding
- DST
- CSIR
- DAE
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Two novel dinuclear Ti(IV) complexes of the ligand, 4,4'-methylene-bis (3-hydroxy-2-naphthalene carboxylic acid) (H4L) or pamoic acid having compositions, [(HL)(2)Ti-2(mu-O)(DMF)(2)]center dot(DMF)(6) (1) and [(L)(2)Ti-2(mu-O)(DMF)(2)]center dot(DMF)(4)(4,4'-Bipy-2H)(H2O),(2) have been synthesized and characterized by analytical and spectral methods and the structure has been established by single crystal XRD. Unlike the reported polymeric structures observed in case of H4L or pamoic acid, the anti-conformation of H4L changes to syn - orientation to avoid poly-metallic complex formation, as noticed in 1 and 2. The dimeric Ti(IV) units stack in the lattice to form helical columns and the space between the adjacent columns is being filled by the solvent molecules in 1 and solvent plus the protonated 4,4'-bipy in the lattice of 2 and thus the neighbor columns are connected through weak interactions. (c) 2009 Elsevier Ltd. All rights reserved.
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