A unique bistable copper-metallacyclic complex is used as an elegant molecular switch for the reversible formation of emulsions by simple pH variation. This switch may have several exciting applications in biphasic processes such as catalysis and separation science technologies.
We describe the reactivity of the 2-phosphaethynolate anion (PCO) towards enantiomerically pure α-amino acids (AAs) resulting in the formation of novel salts of phosphinecarboxamides bearing chiral functionalities. These transformations occurred quantitatively with all but one of the amino acids trialled (the basic amino acid arginine was found to be unreactive). The resulting ionic species can be readily protonated to afford N-(phosphanyl)carbonyl-amino acids, a novel group of amino acids bearing primary phosphine functionalities.
The synthesis, crystal structure and preliminary magnetic characterization of a new heterobimetallic [Mn₅(II)Cu₅(II)] wheel containing a flexible bis-oxamate type ligand are described. This decanuclear compound exhibits a relatively strong intra-wheel antiferromagnetic interaction leading to a ground spin state S = 10.
Ru(ii) and Rh(iii) complexes of the primary phosphinecarboxamide FcNHC(O)PH2 undergo facile dehydrohalogenation to produce phosphide-bridged dimers as syn and anti isomers.
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