ABSTRACT
The interaction of P,N-containing cyclophanes containing two 1,5-diaza-3,7-diphosphacyclooctane fragments with tetracarbonyl(tetrahydrofuran)tungnsten(0) or tetracarbonyl(norbornadiene)molybdenum(0) leads to binuclear bis-P,P-chelate complexes with tetracarbonylmetal moieties located outside of the macrocyclic cavities; the complexation is sensitive to ligands structures and bulky substituents on phosphorus atoms prevent the complexation of VI group metals.