ID | 57595 |
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Author |
Yakubu, Abdallah
Graduate School of Natural Science and Technology, Okayama University
ORCID
Suzuki, Takayoshi
Research Institute for Interdisciplinary Science, Okayama University
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Abstract | (E)-N-Benzylidenepicolinohydrazide (Hbphz) was used to synthesize a series of hydrazonato-bridged homodinuclear Ln(2)(III) dithiocarbamato (RR'dtc(-)) complexes of the form [{Ln(RR' dtc)(2)}(2)(mu-bphz)(2)] {Ln= La, Pr, Nd, Sm or Eu; RR'= dimethyl-(Me-2) or pyrrolidine-(pyr)}. X-ray crystallographic studies revealed that these complexes possessed a common head-to-tail type dinuclear structural motif in which two hydrazonato ligands bridged two Ln(III) centers in the mu- 1 kappa N-2(py),O:2 kappa O-2,N(imine) mode and two RR'dtc ligands coordinated to each Ln(III) center. Interestingly, while the Sm-III and Eu-III complexes crystallized as simple 8:8-coordinate dinuclear molecules, the lighter Ln(III) (i.e. La-III, Pr-III and Nd-III) complexes afforded in some cases 9:9-coordinate molecules, where the ninth coordination site was occupied by a solvent ethanol or methanol molecule. Even for the lighter Ln(III) complexes, the complexes were solved in dichloromethane or chloroform as the 8:8-coordinate dimer, as revealed by H-1 NMR spectroscopy. In the UV-visible absorption and magnetic circular dichroism (MCD) spectra of the complexes, similar spectral patterns for ligand-centered and Laporte forbidden f-f transitions were observed. The MCD spectral studies demonstrated the characteristic magneto-optical behavior of the complexes.
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Keywords | Hydrazone
Dithiocarbamate
Crystal structures
Lanthanoid
Magnetic circular dichroism
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Note | © 2019 Elsevier B.V. This manuscript version is made available under the CC-BY-NC-ND 4.0 License.http://creativecommons.org/licenses/by-nc-nd/4.0/.This is the accepted manuscript version. The formal published version is available at https://doi.org/10.1016/j.ica.2019.119124
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Published Date | 2019-12-01
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Publication Title |
Inorganica Chimica Acta
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Volume | volume498
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Publisher | Elsevier
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Start Page | 119124
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ISSN | 00201693
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NCID | AA10761133
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Content Type |
Journal Article
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language |
English
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OAI-PMH Set |
岡山大学
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File Version | author
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DOI | |
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Related Url | isVersionOf https://doi.org/10.1016/j.ica.2019.119124
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License | http://creativecommons.org/licenses/by-nc-nd/4.0/
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Citation | Abdallah Yakubu, Takayoshi Suzuki, Masakazu Kita, Dinuclear lanthanoid(III) dithiocarbamato complexes bridged by (E)-N-benzylidenepicolinohydrazonate: Syntheses, crystal structures and spectroscopic properties, Inorganica Chimica Acta, Volume 498, 2019, 119124, ISSN 0020-1693, https://doi.org/10.1016/j.ica.2019.119124.
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Funder Name |
Ministry of Education, Culture, Sports, Science and Technology
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助成番号 | 18K05146
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Open Access (Publisher) |
non-OA
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Open Archive (publisher) |
Non-OpenArchive
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