Hexamethylene-1,6-bis-(N,N-dimethyl-N-dodecylammonium bromide), pentamethylene-1,5-bis(N,N-dimethyl-N-dodecylammonium bromide), tetramethylene-1,4-bis(N,N-dimethyl-N-dodecylammonium bromide), trimethylene-1,3-bis(N,N-dimethyl-N-dodecylammonium bromide) and ethylene-1,2-bis(N,N-dimethyl-N-dodecylammonium bromide) have been obtained and characterized by FTIR and NMR spectroscopy. DFT calculations...

New examples of ansa-titanocenes derived from 1,2-bis(2-indenyl)ethane have been prepared. The titanium-mediated reductive coupling of 2-(hydroxymethyl)indenes provided a convenient method for substrate dimerization. Alkyl substitution of the indene ring at C(3) improved the regioselectivity of the reductive coupling to provide the ethylene bis(2-indenyl)ansa-ligands in 29–62% yield.

The multicomponent reaction of 1,2-di(4-pyridyl)ethylene, catechol, 3,5-bis(trifluoromethyl)phenylboronic acid and 1,5-dinaphtho-38-crown-10 or bis-para-phenylene-34-crown-10, respectively, resulted in the formation of rotaxanes, which were characterized by X-ray crystallography.

The fluorescence spectral characteristics and interaction of bis(ethylene)tin(bis(salicylidene)ethylenediamine) [Et2Sn(salen)] with DNA are described. The polarity of the solvent has a strong effect on the fluorescence characteristics of Et2Sn(salen). Et2Sn(salen) bound to DNA showed a marked decrease in the fluorescence intensity with a bathochromic shift of the excitation and emission peaks. ...

In general, ethylene/1,3-butadiene copolymerizations provides copolymers possessing both pendant vinyls and vinylenes as olefinic moieties. We, at MCI, studied the substituent effects of C2-symmetric zirconocene complexes, rac-[Me2Si(Indenyl’)2]ZrCl2 (Indenyl’ = generic substituted indenyl), after activation on the ratio of the pendant vinyls and vinylenes of the resultant copolymers. Complexes...

Novel synthetic approaches to chiral ethylene-bridged ansa-titanocenes possessing stereogenic centers on the bridging carbon chain are described. A key step in the preparation of these compounds is the double-Skatteberl rearrangement of bis(vinyldibromocyc1opropane) intermediates derived from 1,4-disulfones. The influence of tether substitution on the diastereoselection in ansa-titanocene forma...

The study discusses the possible binding of molecular oxygen to some new CoII complexes with the Schiff base ligands of the Co(Salen) type. The investigated complexes of CoII with the Schiff bases are: (bis(5-nitro-salicylaldehyde)ethylenediaminato)cobalt(II), Co(NSalen); (bis( -ethylene-salicylaldehyde)ethylenediaminato)cobalt(II), Co(EtSalen); (bis( -ethylene-3,5-diiode-salicylaldehyde)ethyle...

A novel immobilized dehydrocondensing reagent comprised of a triazine-type dehydrocondensing reagent itself in a polymerized form was synthesized by copolymerization between tetra(ethylene glycol) bis(dichlorotriazinyl) ether and tris(2-aminoethyl)amine.

Alkali metal reduction of tungsten tetrachloride in the presence of excess trimethylphosphite and ethylene affords moderate yields of trans-tetrakis(trimethylphosphite)tungsten bis(ethylene). This easily prepared species bearing inexpensive ancillary ligands promotes the oxidative coupling of carbon dioxide and ethylene at ambient temperature to produce two isomeric tetrakis(trimethylphosphite)...