Krishna Kumar, D. ; Das, Amitava ; Dastidar, Parthasarathi (2007) Isomerism in coordination complexes and polymers derived from bispyridylurea ligands: Effect of solvents, conformational flexibility, and positional isomerism of the ligands Crystal Growth & Design, 7 (10). pp. 2096-2105. ISSN 1528-7483
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Official URL: http://pubs.acs.org/doi/abs/10.1021/cg070301l
Related URL: http://dx.doi.org/10.1021/cg070301l
Abstract
Reactions between Cd(NO3)2· 6H2O and N,N'-bis(3-pyridyl)urea (3bpu)/N,N'-bis(4-pyridyl)urea (4bpu) with a 1:2 metal:ligand ratio under various solvent systems (polar/nonpolar) afforded four discrete coordination complexes, namely, [{(H2O)2Cd(3bpu)4}· (NO3)2· 2H2O· X] 1, [{(H2O)2Cd(3bpu)4}· (NO3)2] 3, [{(H2O)2Cd(3bpu)4}· (NO3)2· 2H2O· p-xylene] 4, [{(H2O)2 (NO3)2Cd(μ-4bpu)2}] 8, and four coordination polymers, namely, [{(H2O)3(NO3)Cd(μ-3bpu)}· (NO3)· H2O· 1/2o-xylene]n 2, [{(H2O)3(NO3)Cd(μ-3bpu)}· (NO3)· X]n 5, [{(NO3)2Cd(μ-3bpu)2}]n 6, [{(H2O)(NO3)Cd(μ-4bpu)2}· (NO3)· EtOH· nitrobenzene]n 7, which were mainly characterized by single-crystal X-ray diffractometry. The effect of solvents, conformational flexibility, and positional isomerism of the ligands on the various isomerisms (supramolecular isomerism and polymorphism) is discussed.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Chemical Society. |
| ID Code: | 59937 |
| Deposited On: | 08 Sep 2011 10:21 |
| Last Modified: | 08 Sep 2011 10:21 |
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