A metal-organic framework [Cd(dppip)] n (1) based on 5-(diphenylphosphino)isophthalic acid (H 2 dppip) has been synthesized hydrothermally and characterized by IR spectroscopy, elemental analysis, and X-ray crystallography.[Cd(dppip)] n shows a sheet structure owing to carboxylate bridging with windows with dimensions 10.692 × 9.325Å 2 . The layers are further connected through P-Cd interactions to give a three-dimensional supramolecular network. The thermal analysis (DTA) of complex 1 exhibited an exceptionally high thermal stability (m. p. 452.8 • C). The compound shows fluorescence at ca. 418 nm upon excitation at 314 nm.

Abstract

In the title compound, [Cd(C8H4O5)(C12H12N2)], the CdII cation is coordinated by three 5-hy­droxy­isophthalate anions and one 5,5′-bimethyl-2,2′-bipyridine ligand in a distorted CdO4N2 octa­hedral geometry. The 5-hy­droxy­isophthalate anions bridge the Cd cations, forming a two-dimensional polymeric complex parallel to (100). In the complex, the hy­droxy group is linked to the uncoordinated carb­oxy-O atom via an O—H⋯O hydrogen bond. Weak C—H⋯O hydrogen bonds are also present in the crystal structure. One of the methyl groups is disordered over two positions in a 0.536 (11):0.464 (11) ratio.

The crystal structure of the title compound, (C16H13FN)[Ni(C3S5)2], consists of NiIII complex anions and 1-(2-fluoro­benz­yl)quinolinium (fbq) cations. In the complex anion, the NiIII cation is chelated by two 2-sulfanylidene-1,3-dithiole-4,5-dithiol­ate (dmit) dianions in a distorted square-planar geometry; the two dmit mean planes are twisted with respect to each other at a dihedral angle of 8.44 (3)°. In the fbq cation, the dihedral angle between the benzene ring and the quinoline ring system is 80.57 (14)°. The centroid–centroid distance of 3.860 (5) Å between benzene rings indicates π–π stacking between adjacent fbq cations. The distance of 3.4958 (18) Å between the S atom and the centroid of the pyridine ring suggests the existence of a lone-pair–aromatic inter­action between the anion and the cation. A short S⋯S contact [3.387 (2) Å] is also observed in the crystal structure.

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