Abstract
A novel class of organophosphorus macrocycles containing one phosphonamide or one thiophosphonamide group was obtained by condensation of bis(dimethylamino)methyl-phosphine with the appropriate oligoether-bisprimary amine, followed by the oxidation of the P(III) species. The structures of two macrocyclic phosphonamide ligands (3 and 4) which differ in the length of the oligoether chain, and that of the potassium thiocyanate complex of 4, were studied by X-ray diffraction. The crystals of 3 and 4 contain two crystallographically independent molecules. A cavity appears in the centre of each uncomplexed molecule, but the oxygen atoms of the longer oligoether chain are better oriented towards the centre of this cavity. An important rearrangement of the molecular conformation of 4 occurs upon complexation as shown in the crystal structure analysis of the complex 4 . KSCN. The phosphoryl O atom of one molecule binds to the metal ion of another complexed molecule, leading to the self assembly of 4. KSCN complexes.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
