title: Platinum(II) molecular triangle with a deep intramolecular cavity.
abstract: Depending on the conditions, the reaction of K 2PtCl 4 with 1,3-bis( N-pyrazolyl)benzene (bpzphH) yields either Pt(bpzph)Cl, [Pt(mu-bpzph)Cl] 3, or a mixture of these products. In the case of the C 3-symmetric trimer, each bpzph (-) ligand is bidentate with the metal bonded to a pyrazolyl group and to the phenyl group at the 6 position; the remaining pyrazolyl group bridges to an adjacent platinum center. The crystal structure confirms that each complex is chiral with an unusually deep (approximately 8 A) intramolecular cavity; enantiomeric pairs of trimers encapsulate the diethyl ether solvate. NMR studies establish that the trimer exhibits excellent thermal and kinetic stability. Substitution of the chloride ligands provides a strategy for elaborating the macrocycle.
authors.affiliation: Department of Chemistry, University of Cincinnati, Cincinnati, OH 45221-0172, USA.
authors.forename: Stuart A
authors.initials: SA
authors.lastname: Willison
authors.forename: Jeanette A
authors.initials: JA
authors.lastname: Krause
authors.forename: William B
authors.initials: WB
authors.lastname: Connick