PHOSPHORHYDRAZIDE MACROCYCLES AND CRYPTANDS

Several ways of synthesis of N-N-P-N-N containing macrocycles are desc ribed. These methods allowed the isolation of more than 120 macrocycle s of different sizes, incorporating phosphorus atoms in several coordi nences (tri, tetra, penta coordination), several heteroatoms (silicon, zirconium, titanium) and different types of functions (C=N, P-CI, P-N -3). The complexation ability of these macrocycles as well as their ve rsatile reactivity,leading to more complex systems such as multimacroc ycles and phosphorus cryptands are also described.