A unique mode of molecular recognition in palladium(II) metallacrown ethers
Abstract
Metallacrown ethers of the type [PdX2{Ph2P- (CH2CH2O)4CH2CH2PPh2-P,P′}]m (X = Cl, I) exhibit a unique and reversible mode of molecular recognition in which PdX2 units are incorporated into the metallacrown ether ring via a ring-expansion reaction to form dimetallacrown ethers.