نتایج جستجو برای: 12 crown 4
تعداد نتایج: 1723592 فیلتر نتایج به سال:
The title complex, [Na(C(12)H(24)O(6))](2)[InNa(NCS)(6)(C(12)H(24)O(6))]·1.5C(2)H(4)Cl(2), has been synthesized by the reaction of 18-crown-6 with InCl(3) and NaSCN. The In atom has a six-coordinate octa-hedral environment, being bonded to the N atoms of six thio-cyanate groups. The bond lengths and angles show normal values. The crystal packing exhibits no significantly short inter-molecular c...
Two new conjugated porphyrin-based systems (dimers 3 and 4) endowed with suitable crown ethers have been synthesized as receptors for a fullerene-ammonium salt derivative (1). Association constants in solution have been determined by UV-vis titration experiments in CH2Cl2 at room temperature. The designed hosts are able to associate up to two fullerene-based guest molecules and present associat...
Complexes of the anion of the secondary amine 2-phenylaminopyridine (LH) with the heavier alkali metals Na-Cs have been prepared in the presence of various macrocyclic polyether crowns [12-crown-4 (12C4), 15-crown-5 (15C5), and 18-crown-6 (18C6)], which coordinate to the metal ions in all cases. Depending on the combination of alkali metal and crown, the products include separated ion pairs [(c...
Despite intense research in FLP chemistry, nothing is known about monomolecular anionic FLPs and/or complexes thereof. Herein, synthesis and reaction of the first anionic FLP complex is described using [(OC)5W{(Me3Si)2HCP(H)OLi(12-crown-4)}], Cy2BCl and subsequent deprotonation by KHMDS. The obtained anionic FLP complex reacts readily with CO2 in a concerted manner.
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