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

doi:10.1039/b923820d

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

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

17 Citations (Scopus)

Abstract

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), {[Co₄(μ₂-Cl) ₂(μ₂-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 [Co^II 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.

Original language	English
Pages (from-to)	2755-2761
Number of pages	7
Journal	CrystEngComm
Volume	12
Issue number	10
DOIs	https://doi.org/10.1039/b923820d
Publication status	Published - Oct 2010
Externally published	Yes

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@article{cbeffa64d20d4058a6897a552624b835,

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

abstract = "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), {[Co4(μ2-Cl) 2(μ2-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.",

author = "Biao Wu and Jin Yang and Yanyan Liu and Fuyu Zhuge and Ning Tang and Yang, {Xiao Juan}",

year = "2010",

month = oct,

doi = "10.1039/b923820d",

language = "English",

volume = "12",

pages = "2755--2761",

journal = "CrystEngComm",

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publisher = "Royal Society of Chemistry",

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TY - JOUR

T1 - Solvent-directed conformational variation of Co(ii)/(iii) complexes with a diiminopyridine ligand

AU - Wu, Biao

AU - Yang, Jin

AU - Liu, Yanyan

AU - Zhuge, Fuyu

AU - Tang, Ning

AU - Yang, Xiao Juan

PY - 2010/10

Y1 - 2010/10

N2 - 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), {[Co4(μ2-Cl) 2(μ2-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.

AB - 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), {[Co4(μ2-Cl) 2(μ2-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.

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U2 - 10.1039/b923820d

DO - 10.1039/b923820d

M3 - Article

AN - SCOPUS:77957710403

SN - 1466-8033

VL - 12

SP - 2755

EP - 2761

JO - CrystEngComm

JF - CrystEngComm

IS - 10

ER -

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

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