Chiral one-dimensional O–P–O bridged MnIII-Schiff base complexes

Ting-Ting Wang; Song-Song Bao; Jian Huang; Yi-Zhi Li; Li-Min Zheng

doi:10.1039/C2DT32171H

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Chiral one-dimensional O–P–O bridged Mn^III-Schiff base complexes†

Ting-Ting Wang,^a Song-Song Bao,*^a Jian Huang,^a Yi-Zhi Li^a and Li-Min Zheng*^a

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* Corresponding authors

^a State Key Laboratory of Coordination Chemistry, Coordination Chemistry Institute, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
E-mail: lmzheng@nju.edu.cn, baososo@nju.edu.cn
Fax: +86-25-83314502

Abstract

Two couples of enantiomerically pure metal phosphonates are successfully synthesized by using chiral Mn^III-Schiff base mononuclear precursors. Compounds [Mn((R,R)-5-Brsalcy)(2-FC₆H₄PO₃H)]·3H₂O (1) and [Mn((R,R)-5-Brsalcy)(4-CH₃C₆H₄PO₃H)]·CH₃OH·H₂O (3) [5-Brsalcy = N,N′-(1,2-cyclohexanediylethylene)bis(5-bromosalicylideneiminato) dianion] are isostructural and show similar one-dimensional chain structures where the Mn((R,R)-5-Brsalcy)⁺ species are bridged by O–P–O units. Compounds 2 and 4 are (S,S)-enantiomers of 1 and 3, respectively. These compounds are all optically active, exhibiting second harmonic generation responses 0.3 times that of urea. The magnetic measurements of 1 and 3 reveal that dominant antiferromagnetic interactions are mediated between the Mn^III centers.

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Article information

DOI: https://doi.org/10.1039/C2DT32171H
Article type: Paper
Submitted: 19 Sep 2012
Accepted: 25 Oct 2012
First published: 25 Oct 2012

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Dalton Trans., 2013,42, 1842-1847

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Chiral one-dimensional O–P–O bridged Mn^III-Schiff base complexes

T. Wang, S. Bao, J. Huang, Y. Li and L. Zheng, Dalton Trans., 2013, 42, 1842 DOI: 10.1039/C2DT32171H

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Dalton Transactions