title: Synthesis and crystal and molecular structure of a tetranuclear cluster based on the rhenium(III)-bisorganohydrazino core: [Re(HNNC(4)H(3)N(2))(NNC(4)H(3)N(2))(OCH(3))(2)](4).
abstract: Reaction of NH(4)ReO(4) with excess 2-hydrazinopyrimidine in methanol yields [Re(eta(1)-NNC(4)H(3)N(2)H)(eta(2)-HNNC(4)H(3)N(2))Cl(3)] (1). Attempts to recrystallize 1 by slow diffusion of methanol into DMF after 8 months produced black crystals of [Re(HNNC(4)H(3)N(2))(NNC(4)H(3)N(2))(OCH(3))(2)](4) (2). The structure of 2 consists of isolated tetranuclear clusters, constructed from {Re(eta(2)-HNNC(4)H(3)N(2))(eta(1)-NNC(4)H(3)N(2))(OCH(3))(2)} units linked through the beta-nitrogen of the chelating organodiazene ligand of adjacent units into a box-like aggregate.
authors.affiliation: Department of Chemistry, Syracuse University, Syracuse, NY 13244, USA.
authors.forename: Frank J
authors.initials: FJ
authors.lastname: Femia
authors.forename: Xiaoyuan
authors.initials: X
authors.lastname: Chen
authors.forename: Kevin P
authors.initials: KP
authors.lastname: Maresca
authors.forename: John W
authors.initials: JW
authors.lastname: Babich
authors.forename: Jon
authors.initials: J
authors.lastname: Zubieta