Two new poly-nuclear coordination compounds of Zn(II) and Mn(II) viz. [Zn2(male)2(3-AMpy)4]•3H2O (1) and [Mn(H2O)2(μ-fum)(3-CNpy)2]n (2) (male = maleate, fum = fumarate, 3-AMpy = 3-aminopyridine, 3-CNpy = 3-cyanopyridine) have been synthesized...
Two new Ni(II) and Co(II) coordination compounds,viz., [Ni(H2O)5(DMAP)](IPhth)·2H2O (1) and [Co(Hdmpz)4(H2O)2]Cl2 (2) (where DMAP = 4-dimethylaminopyridine, IPhth = Isophthalate, Hdmpz = 3,5-dimethylpyrazole),were synthesized and characterized using elemental analysis, TGA, spectroscopic (FTIR and electronic) and single-crystal X-ray diffraction techniques. Compound 1 crystallizes as a co-crystal hydrate of Ni(II), whereas compound 2 is a mononuclear compound of Co(II). The crystal structure analysis of compound 1 reveals the presence of various non-covalent interactions such as anion‒π, π‒π, C‒H∙∙∙π, C‒H∙∙∙C, etc., which stabilize the layered assembly of the compound. In compound 2, enclathration of counter chloride ions within the supramolecular trimeric host cavity plays a crucial role in the stabilization of the compound. The non-covalent interactions observed in the crystal structures were further studied theoretically, focusing on the cooperative π-stacking interactions between the DMAP and IPhth counter-ions in 1. To identify the non-covalent interactions of the compounds, Hirshfeld surfaces and their associated two-dimensional fingerprint regions were analyzed. Theoretical calculations confirm that H-bonding interactions combined with the π-stacking contacts are crucial synthons for the solid-state stability of compound 1.
Two new dinuclear coordination compounds viz. [Cu2(µ-fum)(phen)2(H2O)6](fum)•6H2O (1) and [Mn2(µ-phth)2(phen)4]•2H2O (2) (phen = 1,10-phenanthroline, fum = fumarate and phth = phthalate) have been synthesized and characterized by elemental analysis, single...
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