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Chiral and achiral helical coordination polymers of zinc and cadmium from achiral 2,6-bis(imidazol-1-yl)pyridine: Solvent effect and spontaneous resolution
| Content Provider | Semantic Scholar |
|---|---|
| Author | Tripathi, Sarita Srirambalaji, Renganathan Singh, Namita Anantharaman, Ganapathi |
| Copyright Year | 2014 |
| Abstract | AbstractFour 2D helical coordination polymers (CPs) (1–4) were synthesized using achiral 2,6-bis (imidazol-1-yl)pyridine (pyim2) ligand with metal nitrates (metal = zinc and cadmium), which showed that variation in the solvent condition leads to difference in geometry around the central metal ion and results in chiral/achiral behaviour of these CPs. By using (pyim2), [trans-Zn(pyim2)2(NO3)2]n (1) was obtained by unary solvent (MeOH), while [trans- Cd(pyim2)2(NO3)2]n (2) was formed under binary solvent mixtures (DMF/MeOH). On the other hand, in ternary solvent mixture (DMF/MeOH/H2O) it resulted into an achiral {[trans-Zn(pyim2)2(H2O)2] ·(NO3)2}n (3) and homochiral {[cis-Cd(pyim2)2(H2O)2] ·(NO3)2}n (4) coordination polymer, respectively. The homochiral behaviour of the coordination polymer (4) was further studied by solid state CD spectra and also its optical behaviour was analyzed by polarimetry. Graphical AbstractFour solvent dependent 2D coordination polymers (CPs) 1-4, containing helical chains were synthesized using achiral ligand 2,6-bis(imidazol-1-yl)pyridine (pyim2), with zinc nitrate and cadmium nitrate. Single crystal X-ray analysis revealed, 1-3 are achiral frameworks whereas, 4 is homochiral in nature which is further confirmed by CD spectroscopy and polarimetry. |
| Starting Page | 1423 |
| Ending Page | 1431 |
| Page Count | 9 |
| File Format | PDF HTM / HTML |
| DOI | 10.1007/s12039-014-0650-8 |
| Volume Number | 126 |
| Alternate Webpage(s) | https://www.ias.ac.in/article/fulltext/jcsc/126/05/1423-1431 |
| Alternate Webpage(s) | https://doi.org/10.1007/s12039-014-0650-8 |
| Journal | Journal of Chemical Sciences |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
