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Control of chirality and catenation in cobalt and cadmium camphorate coordination complexes

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Abstract

Hydrothermal reaction of either cobalt or cadmium nitrate, D-camphoric acid (H2cam), and conformationally flexible dipyridylamide ligands produced five coordination networks which were structurally characterized by single-crystal X-ray diffraction. {[Co2(DL-cam)2(bdn)]·2H2O}n (1, bdn = N,N′-(butane-1,4-diyl)dinicotinamide) possesses {Co2(OCO)4} paddlewheel dimer-based [Co2(DL-cam)2] grid layers pillared by bdn ligands into a 6-connected 41263 pcu network. In contrast, the cadmium analog {[Cd2(D-cam)2(bdn)2]·5H2O}n (2) shows {Cd2(OCO)2} dimer-based [Cd2(D-cam)2] layers tethered by bdn ligands into an 8-connected 42464 bcu network. {[Co2(D-cam)2(pdn)]·2H2O}n (3, pdn = N,N′-(propane-1,3-diyl)dinicotinamide) manifests a self-penetrated 446810 mab network in contrast to 1, and retains chirality. {[Cd2(D-cam)2(pdn)]·H2O}n (4) manifests {Cd2(OCO)4} paddlewheel dimer-based [Cd2(D-cam)2] grids, connected by exotridentate pbn ligands into a unique 3,7-connected 3D network with (3·52)(324456687) topology derived from a rare non-self-penetrated 4966 acs topology sublattice. {[Co2(DL-cam)2(pedn)]·2H2O}n (5, pedn = N,N′-(pentane-1,5-diyl)dinicotinamide) shows a hybrid structure of discrete slabs of 3D pcu network with interleaved 2D hxl (3,6) layers at random intervals, instead of the self-penetrated mab network seen in 3. The specific coordination environments and dipyridylamide lengths result in control of topology and self-penetration in this series of coordination networks. The cadmium complexes 2 and 4 were assayed for luminescent and nitrobenzene detection properties. Thermal properties of 1–5 are also discussed.

Graphical abstract: Control of chirality and catenation in cobalt and cadmium camphorate coordination complexes

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Publication details

The article was received on 27 Sep 2017, accepted on 04 Nov 2017 and first published on 06 Nov 2017


Article type: Paper
DOI: 10.1039/C7CE01712J
Citation: CrystEngComm, 2017, Advance Article
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    Control of chirality and catenation in cobalt and cadmium camphorate coordination complexes

    J. J. Przybyla and R. L. LaDuca, CrystEngComm, 2017, Advance Article , DOI: 10.1039/C7CE01712J

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