By using an octadentate ligand tetrakis [(3,5-dicarboxyphenoxy)methyl] methane (H 8 L), a new microporous metal-organic framework [Cu 4 L(H 2 O) 4 ](H 2 O) 31 (1) was solvothermally synthesized and structurally characterized. MOF 1 is built from the 4-connected square planar [Cu 2 (O 2 CR) 4 ] cluster and 8-connected cube ligand L to have a highly open framework with scu topology. It possesses permanent porosity as confirmed by N 2 , H 2 , C 2 H 2 , CO 2 and CH 4 gas adsorption measurements and exhibits high acetylene storage of 193 and 154 cm 3 g À1 at 273 and 296 K under 1 atm, respectively.

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The title compound, 3,3'-(4-pyridylimino)dipropanenitrile, C(11)H(12)N(4), has a twofold axis and consists of a pyridine ring head and two cyanoethyl tails, the three groups being linked by an N atom. The planar geometry around the amino N atom suggests conjugation with the pi-system of the pyridine ring. The molecules are stacked in a layer structure via relatively weak to very weak intermolecular C-H.pi and C-H.N hydrogen-bond interactions.

The title complex, bis[3,3'-(pyridine-4-imino-kappaN(1))dipropanenitrile]silver(I) perchlorate, [Ag(CEAP)(2)]ClO(4) (CEAP is 4-[N,N-bis(2-cyanoethyl)amino]pyridine, C(11)H(12)N(4)), has been prepared and characterized. The unit cell consists of two crystallographically non-equivalent molecules. Cation cavities are constructed by [Ag(CEAP)(2)](+) cations through hydrogen bonds, and the ClO(4)(-) anions are incorporated into the cavities in mu(4)- and mu(2)-ClO(4)(-) bridging modes through C-H.O hydrogen bonds.

The title nest-shaped cluster, [Cu 3 WIOS 3 (C 10 H 8 N 2 ) 2 ], has been synthesized by the reaction of (NH 4 ) 2 [WOS 3 ], CuI and 2,2 H -bipyridine (bipy) in dimethylformamide under a puri®ed nitrogen atmosphere. The cluster has a neutral skeleton containing the bipy ligands, and the central W atom is tetrahedrally coordinated by three S atoms and one O atom. The three Cu atoms are divided into two different kinds. Two Cu atoms adopt distorted tetrahedral geometry, with each Cu atom coordinated by two S atoms and the two N atoms of a bipy ligand. The other Cu atom adopts a trigonal mode surrounded by two S atoms and one I atom. Figure 2The packing of (I), projected down the b axis. Broken lines indicate CÐ HÁ Á ÁO interactions. H atoms have been omitted. Figure 1The molecular structure of (I), shown with 30% probability displacement ellipsoids.