Rajegowda, H. R. and Raghavendra Kumar, P. and Hosamani, Amar and Butcher, Ray J. and Naveen, S. and Lokanath, N. K. (2018) Synthesis, characterization and single crystal structures of chiral Schiff base and its tetranuclear palladium complex with PdOPd bridging and PdPd bonds. Journal of Molecular Structure, 1156. 301 - 307. ISSN 0022-2860
Full text not available from this repository. (Request a copy)Abstract
A new chiral Schiff base ligand 2-N-(2S)-(1-hydroxy-3-phenylpropan-2-ylethanimidoyl phenol ((S) H2L) was obtained by acid catalyzed condensation of (2S)-(−)-2-amino-3-phenyl-1-propanol with 2′-hydroxyacetophenone. The palladium complex was prepared by treating a solution of (S)H2L in acetone with a solution of Na2PdCl4 in water in 1:1 M ratio. The new ligand and its complex were characterized by FT-IR, 1H, 13C1H NMR spectroscopy, polarimetry and elemental analysis and their molecular structures were determined by single crystal X-ray diffraction. Both the compounds crystallizes in monoclinic system in the space group P21. There exists an intra OH⋯N (1.62(5) Å) and intermolecular OH⋯O (1.53(5) Å) and CH⋯O (2.59 Å) hydrogen bonding and secondary interactions in the crystal of (S)H2L. The structure of the palladium complex was found very interesting wherein the ligand coordinated to metal center as tridentate dianionic (O−, N, O−) fashion, (S)-L, resulting in a tetranuclear palladium cluster, Pd4((S)-L)4. In these supramolecular structures phenolate oxygen coordinated to Pd(II) ion as PdO terminal bonds 1.934(12) - 1.977(11) Å and the alkoxide oxygen coordinated as PdOPd bridging bonds 1.993(11) - 2.012(12) Å. The PdN bond lengths found were in the range of 1.949(13) to 1.919(12) Å. There exists two asymmetric tetranuclear complex molecules in its crystal lattice. There exists very strong metal-metal bond interaction, Pd(2)Pd(3) 3.0410(18) Å and Pd(6)Pd(7) 3.0517(19) Å respectively in the two asymmetric units.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Chiral Schiff base, Crystal structure, Palladium, PdPd bond |
| Subjects: | D Physical Science > Physics |
| Divisions: | Department of > Physics |
| Depositing User: | Manjula P Library Assistant |
| Date Deposited: | 19 Jul 2019 08:32 |
| Last Modified: | 11 Jul 2022 09:17 |
| URI: | http://eprints.uni-mysore.ac.in/id/eprint/5375 |
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