Browse Items (97 total)

REACTIVITY OF DISUBSTITUTED BENZOCYCLOBUTENES - MODEL COMPOUNDS OF CROSS-LINKABLE HIGH-PERFORMANCE POLYMERS

We have previously reported on the synthesis of a new 2,5-disubstituted benzocyclobutene
monomer which is capable of undergoing thermally activated cross-linking. This monomer, a derivative of
terephthalic acid, can be incorporated into the…

EFFECT OF PROCESSING PARAMETERS ON BI-SR-CA-CU-O SYSTEM

The effect of calcium content on the formation of the superconducting phases in the Bi-Sr-Ca-Cu-O systems has been examined. The influence of sintering temperature and the duration of sintering time has been studied.

Ligand substitution reactions of W6S8L6 with tricyclohexylphosphine (L=4-tert-butylpyridine or n-butylamine): P-31 NMR and structural studies of W6S8(PCy3)(n)(4-tert-butylpyridine)(6-n) (0 < n <= 6) complexes

The substitution reactions by bulky tricyclohexylphosphine (PCy3) ligands on W6S8L6 (L = 4-tert-butylpyridine or PI-butylamine) clusters were investigated to prepare clusters with mixed axial ligands for low-dimensional cluster linking. When 4- 6…

Synthesis and characterization of oxidized W6S8L6 clusters

Cationic [W6S8L6]PF6 (L = PEt3 (3), 4-tert-butylpyridine (4)) clusters, were successfully synthesized and isolated for the first time by reacting the corresponding neutral W6S8L6 (L = PEt3 (1), 4-tert-butylpyridine (2)) clusters with [Cp2Fe]PF6 as…

Packing principles of thioether derivatives of triarylamine silver salts

Tris(4-methylthiophenyl)amine, 1, has been crystallized together with three silver salts, AgOTf (silver trifluoromethane sulfonate), AgClO4, and AgSbF6. The resulting crystal structures have been determined by singlecrystal X-ray methods. All three…

AN ORGANIC-SOLID WITH WIDE CHANNELS BASED ON HYDROGEN-BONDING BETWEEN MACROCYCLES

Research on microporous solids has focused largely on inorganic materials such as aluminosilicates (zeolites), aluminophosphates, pillared clays and other layered materials(1,2). An elusive goal has been the design of new materials with specific…

SPONTANEOUS ASSEMBLY OF A HINGED COORDINATION NETWORK

THE field of supramolecular chemistry has advanced to a stage at which it is possible to select building blocks that will self-assemble into structures with specific network topologies(1-3). This makes possible the rational design and synthesis of…

CRYSTALLIZATION OF 4,4'-BIPHENYLDICARBONITRILE WITH SILVER(I) SALTS - A CHANGE IN TOPOLOGY CONCOMITANT WITH A CHANGE IN COUNTERION LEADING TO A NINEFOLD DIAMONDOID NETWORK

The preparation and X-ray crystal structures of two coordination networks [Ag(BPCN)(CF3SO3)]. C6H6 1 and [Ag(BPCN)(2)]PF6 2 (BPCN = 4,4'-biphenyldicarbonitrile) are described; 1 consists of infinite chains; however, 2 exists as a ninefold…