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ID 57595
Author
Yakubu, Abdallah Graduate School of Natural Science and Technology, Okayama University ORCID
Suzuki, Takayoshi Research Institute for Interdisciplinary Science, Okayama University ORCID Kaken ID publons researchmap
Kita, Masakazu Faculty of Education, Okayama University Kaken ID publons researchmap
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.
Keywords
Hydrazone
Dithiocarbamate
Crystal structures
Lanthanoid
Magnetic circular dichroism
Note
This fulltext will be available in Sep 2021
Published Date
2019-12-01
Publication Title
Inorganica Chimica Acta
Volume
volume498
Publisher
Elsevier
Start Page
119124
ISSN
00201693
NCID
AA10761133
Content Type
Journal Article
language
英語
OAI-PMH Set
岡山大学
File Version
author
DOI
Web of Science KeyUT
Related Url
isVersionOf https://doi.org/10.1016/j.ica.2019.119124
License
creativecommons.org/licenses/by-nc-nd/4.0/
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.
Funder Name
Ministry of Education, Culture, Sports, Science and Technology
助成番号
18K05146
Open Access (Publisher)
non-OA
Open Archive (publisher)
Non-OpenArchive