Issue 12, 2015

Heterometallic coordination polymers: syntheses, structures and heterogeneous catalytic applications

Abstract

A metalloligand Na[Co(L1)2] (1) of the ligand H2L1 (N2,N6-bis(4,5-dihydrothiazol-2-yl)pyridine-2,6-dicarboxamide) offering appended thiazoline rings has been used for the synthesis of one-dimensional {Co3+–Zn2+} (2), {Co3+–Cd2+} (3) and {Co3+–Hg2+} (4) coordination polymers. 1 offers appended thiazoline rings having both soft sulphur and hard nitrogen donors. The crystal structures of 2 and 3 display the coordination of hard thiazoline-N donors to Zn2+ and Cd2+ ions. Interestingly, 4 illustrates the bonding through both hard thiazoline-N and soft thiazoline-S donors. The three heterometallic coordination polymers have been used as reusable heterogeneous catalysts for the ring-opening reactions of oxiranes and thiiranes; Knoevenagel condensation of benzaldehydes and benzothialdehydes; and cyanation reactions of aldehydes and carbothialdehydes. Our results demonstrate that the relative size and Lewis acidity of secondary metals potentially control the catalytic outcome via preferential interaction with the substrates.

Graphical abstract: Heterometallic coordination polymers: syntheses, structures and heterogeneous catalytic applications

Supplementary files

Article information

Article type
Paper
Submitted
03 Jun 2015
Accepted
02 Oct 2015
First published
08 Oct 2015

New J. Chem., 2015,39, 9772-9781

Author version available

Heterometallic coordination polymers: syntheses, structures and heterogeneous catalytic applications

D. Bansal, S. Pandey, G. Hundal and R. Gupta, New J. Chem., 2015, 39, 9772 DOI: 10.1039/C5NJ01223F

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