Solvent-directed conformational variation of Co(ii)/(iii) complexes with a diiminopyridine ligand

Biao Wu*, Jin Yang, Yanyan Liu, Fuyu Zhuge, Ning Tang, Xiao Juan Yang

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

17 引用 (Scopus)

摘要

The reaction of CoCl2·6H2O or Co(NO 3)2·6H2O with a semi-rigid ditopic ligand 2,6-bis(1-(2,6-diisopropyl-4-(pyridin-3-yl)phenylimino)ethyl)pyridine (L) in various solvent systems led to four complexes, {[CoCl2L 2]·CH2Cl2}n (1a), {[Co(NO3)2L2]·CH2Cl 2}n (1b), {[Co42-Cl) 22-L)2Cl8]·xH 2O}n (2), and [Co4(NO3) 8L2(CH3CN)2]·xH2O (3). Compounds 1a and 1b are isostructural 1D looped-chain coordination polymers constructed by 44-membered [Co2L2] macrocyclic units. Compound 2 shows an unprecedented double μ2-Cl bridged 1D chain structure containing 36-membered [Co4L2] macrocycles. Interestingly, the Co(ii) ions are partially oxidized to form the Co III2Cl2 bridges, and the [CoII 2L2] metallocycles are linked by these Co III2Cl2 units to generate the 1D chain. Compound 3 is a discrete 0D 36-membered metallomacrocycle comprised of four Co(ii) ions and two bridging ligands. The structural variation of the complexes is related to the conformational changes of the semirigid ligand L induced by different solvent systems.

源语言英语
页(从-至)2755-2761
页数7
期刊CrystEngComm
12
10
DOI
出版状态已出版 - 10月 2010
已对外发布

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