An easy-to-do synthesis for the hexanuclear niobium cluster compound [Nb6Cl12(CH3OH)4(OCH3)2] ? DABCO 1.66 CH2Cl2 has been developed. one-pot reaction between precursor [Nb6Cl14(H2O)4] 4H2O and methanol with addition of leads to crystallization title in high yield within a few minutes. The single-crystal X-ray structure this determined. Very strong, nearly symmetric intercluster hydrogen bonds ...

Hydrophilic interaction chromatography (HILIC) is a liquid chromatographic separation mechanism commonly used for polar biological molecules. The use of enhanced-fluidity liquid chromatography (EFLC) with mixtures of methanol/water/carbon dioxide is compared to acetonitrile/water mobile phases for the separation of nucleosides and nucleotides under HILIC conditions. Enhanced-fluidity liquid chr...

Neutral trinuclear (triangular) copper(II) complexes of type [Cu3L3] incorporating the 1,4-aryl linked bis-beta-diketonato bridging ligands, 1,1-(1,4-phenylene)-bis(butane-1,3-dione) (H2L2), 1,1-(1,4-phenylene)-bis(pentane-1,3-dione) (H2L3) and 1,1-(1,4-phenylene)-bis(4,4-dimethylpentane-1,3-dione) (H2L4) have been demonstrated to react with selected heterocyclic nitrogen donor bases to generat...

A  new  and  efficient  synthesis  of  2-amino-4H-chromene  derivativeswhich  have remarkable pharmacological properties  is  developed  by  one-pot  three-component  efficient  reaction  between aldehydes, malononitrile, and α or β-naphthol in MeOH as solvent using DABCO-CuCl complex as an  effective  catalyst  at  room  temperature. The  structures of  synthesized  compounds  were characteriz...