New phosphorus-containing macrocyclic sexidentate ligands: two isomers of 4,7,13,16-tetraphenyl-1,10-dioxa-4,7,13,16-tetraphosphacyclo-octadecane and crystal structures of their cobalt bis-(tetraphenylborate) complexes
Abstract
Two geometrical isomers of the 18-membered macrocycle 4,7,13,16-tetraphenyl-1,10-dioxa-4,7,13,16-tetraphosphacyclo-octadecane (L) have been isolated and the crystal structures of their 1 : 1 complexes with cobalt bis(tetraphenylborate) are reported.