Current heterogeneous catalysts lack the fine steric and electronic tuning required for catalyzing the selective dimerization of ethylene to 1-butene, which remains one of the largest industrial processes still catalyzed by homogeneous catalysts. Here, we report that a metal-organic framework catalyzes ethylene dimerization with a combination of activity and selectivity for 1-butene that is pre...

Bis(1-methylethenyl-cyclopentadienyl)zirconium dichloride (7a) was prepared by a fulvene route. Photolysis at 0 degrees C with Pyrex-filtered UV light resulted in a rapid and complete intramolecular [2+2]cycloaddition reaction to yield the corresponding cyclobutylene-bridged ansa-zirconocene dichloride isomer (8a). This is one of the rare examples of an organic functional group chemistry that l...

The phase transfer catalysed nucleophilic displacement of 1,3-bis(bromomethyl)benzene, 2-methoxy-5methyl-1,3-bis(bromomethyl)benzene (2) and 1,4-bis(bromomethyl)benzene with 2-mercaptoethanol gives the respective diols 3, 4 and 12 (80–85%), which undergo intermolecular cyclodehydrochlorination with thiodiglycolyl dichloride and pyridine-2,6-dicarbonyl dichloride?HCl to provide m-phenylene (7–10...

The title complex, [Sn(CH(3))(2)(C(8)H(10)O(4))](n), was synthesized from cis-cyclo-hexane-1,2-dicarboxylic acid and dimethyl-tin dichloride. The complex has a bridging bis-bidentate carboxyl-ate group resulting in a zig-zag chain structure parallel to [001]. The Sn atom is six-coordinated and displays a distorted octa-hedral geometry.

The title complex, [Co(C(22)H(14)N(4))(2)]Cl(2), has been synthesized by a solvothermal reaction of the 4'-(4-cyano-phen-yl)-2,2':6',2''-terpyridine ligand with CoCl(2)·6H(2)O. The cobalt(II) ion is six-coordinated by two tridentate ligands in a distorted octa-hedral geometry. The benzene rings form dihedral angles of 30.02 (7) and 30.26 (7)° with the mean planes of the terpyridine ring systems...