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ID 57595
著者
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
抄録
(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.
キーワード
Hydrazone
Dithiocarbamate
Crystal structures
Lanthanoid
Magnetic circular dichroism
備考
This fulltext will be available in Sep 2021
発行日
2019-12-01
出版物タイトル
Inorganica Chimica Acta
498巻
出版者
Elsevier
開始ページ
119124
ISSN
00201693
NCID
AA10761133
資料タイプ
学術雑誌論文
言語
English
OAI-PMH Set
岡山大学
論文のバージョン
author
DOI
Web of Science KeyUT
関連URL
isVersionOf https://doi.org/10.1016/j.ica.2019.119124
ライセンス
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.
助成機関名
文部科学省
助成番号
18K05146
オープンアクセス(出版社)
非OA
オープンアーカイブ(出版社)
非OpenArchive