Synthesis and Characterization of a Crown-Shaped 36-Molybdate Cluster and Application in Catalyzing Knoevenagel Condensation.

A novel crown-shaped 36-molybdate cluster with organophosphonate-functionalized polyoxomolybdates, (NH)NaH[Co(HO)TeMoO{N(CHPO)}]·42HO, has been successfully synthesized and well-characterized. It owns the highest nuclearity in the family of organophosphonate-based polyoxometalates reported so far. Furthermore, for the first time in the field, we illustrated that polyoxomolybdate could work as an effective heterogeneous catalyst for the Knoevenagel condensation reaction with high TOF (7714 h) and good recyclability.

Crystal structure of (E)-N-[(2-chloro-6-meth-oxy-quinolin-3-yl)methyl-idene]-9-ethyl-9H-carbazol-3-amine.

In the title compound, C25H20ClN3O, the C=N bond of the central imine group adopts an E conformation. The mean planes through the essentially planar carbazole [maximum deviation = 0.052 (2)Å] and quinoline [maximum deviation = 0.

Crystal structure of (E)-N-(3,3-di-phenyl-allyl-idene)-9-ethyl-9H-carbazol-3-amine.

In the title compound, C29H24N2, the C=N bond of the central imine group adopts an E conformation. The dihedral angles between the mean plane of the essentially planar carbazole ring system [r.m.

Eco-friendly synthesis and antimicrobial activities of some 1-phenyl-3(5-bromothiophen-2-yl)-5-(substituted phenyl)-2-pyrazolines.

Background: Green catalyst fly ash: H2SO4 was prepared by mixing fly ash and sulphuric acid. Microwave irradiations are applied for solid phase cyclization of 5-bromo-2-thienyl chalcones and phenyl hydrazine hydrate in the presence of fly ash: H2SO4 yields, 1-phenyl-3(5-bromothiophen-2-yl)-5-(substituted phenyl)-2-pyrazolines. These pyrazolines were characterized by their physical constants and spectral data.