title: Expanding the family of heterobimetallic Bi-Rh paddlewheel carboxylate complexes via equatorial carboxylate exchange.
abstract: Five novel homoleptic heterobimetallic bismuth(II)-rhodium(II) carboxylate complexes--BiRh(TPA)4 (1), BiRh(but)4 (2), BiRh(piv)4 (3), BiRh(esp)2 (4), and BiRh(OAc)4 (5)--were synthesized in good yields by equatorial ligand substitution starting from BiRh(TFA)4 (TPA = triphenylacetate, but = butyrate, piv = pivalate, esp = α,α,α',α'-tetramethyl-1,3-benzenedipropionate, OAc = acetate, and TFA = trifluoroacetate). We report here (1)H and (13)C{(1)H} NMR spectra and cyclic voltammograms for complexes , and IR spectra for all complexes. Irreversible redox waves appear between -1.4 to -1.5 V for [BiRh](3+/4+) couples and 1.3 to 1.5 V vs. Fc/Fc(+) for [BiRh](4+/5+) couples for complexes indicating a wide range of stability for the compounds. The X-ray crystal structure of reveals a Bi-Rh distance of 2.53 Å.
authors.affiliation: Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI 53706, USA. berry@chem.wisc.edu.
authors.forename: Travis L
authors.initials: TL
authors.lastname: Sunderland
authors.affiliation: Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI 53706, USA. berry@chem.wisc.edu.
authors.forename: John F
authors.initials: JF
authors.lastname: Berry
mesh_terms: D000085:Acetates / Q000737:chemistry; D001729:Bismuth / Q000737:chemistry*; D002264:Carboxylic Acids / Q000737:chemistry*; D056831:Coordination Complexes / Q000737:chemistry*; D018360:Crystallography, X-Ray; D008958:Models, Molecular; D012238:Rhodium / Q000737:chemistry*
chemical_list: D000085:Acetates; D002264:Carboxylic Acids; D056831:Coordination Complexes; D012238:Rhodium; D001729:Bismuth