title: Tetrarhena-heterocycle from the palladium-catalyzed dimerization of Re2(CO)8(μ-SbPh2)(μ-H) exhibits an unusual host-guest behavior.
abstract: The six-membered heavy atom heterocycles [Re(2)(CO)(8)(μ-SbPh(2))(μ-H)](2), 5, and Pd[Re(2)(CO)(8)(μ-SbPh(2))(μ-H)](2), 7, have been prepared by the palladium-catalyzed ring-opening cyclo-dimerization of the three-membered heterocycle Re(2)(CO)(8)(μ-SbPh(2))(μ-H), 3. The palladium atom that lies in the center of the heterocycle 7 was removed to yield 5. The palladium removal was found to be partially reversible leading to an unusual example of host-guest behavior. A related dipalladium complex Pd(2)Re(4)(CO)(16)(μ(4)-SbPh)(μ(3)-SbPh(2))(μ-Ph)(μ-H)(2), 6, was also formed in these reactions of palladium with 3.
authors.affiliation: Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, USA. Adams@chem.sc.edu
authors.forename: Richard D
authors.initials: RD
authors.lastname: Adams
authors.forename: William C
authors.initials: WC
authors.lastname: Pearl
authors.forename: Yuen Onn
authors.initials: YO
authors.lastname: Wong
authors.forename: Qiang
authors.initials: Q
authors.lastname: Zhang
authors.forename: Michael B
authors.initials: MB
authors.lastname: Hall
authors.forename: Justin R
authors.initials: JR
authors.lastname: Walensky