title: Design, synthesis, and chemistry of sterically nondemanding primary bisphosphines.
abstract: Design and synthesis of chelating bisphosphines functionalized with the smallest chemical unit "H" on the P(III) centers ((PH(2)CH(2))(2)CHCH(2)NHPh (4) and (PH(2)CH(2))(2)CHCONHPh (5)) are described. Studies demonstrating that no bulky chemical substituents are necessary to offer thermal/oxidative stability to the -PH(2) groups in 4 and 5 are described. The H atoms around the P(III) centers in 5 (or 4) concur limited/no steric influence, but yet the phosphines manifest high nucleophilicity to coordinate strongly with W(0) and Re(I). The studies include synthesis and X-ray structural characterization of an air-stable primary bisphosphine (5) and its transition-metal chemistry with W(CO)(6) and Re(CO)(5)Br to produce the complexes (eta(2)-(PH(2)CH(2))(2)CHCONHPh)W(CO)(4) (6) and (eta(2)-(PH(2)CH(2))(2)CHCONHPh)Re(CO)(3)Br (7), respectively.
authors.affiliation: Department of Chemistry, University of Missouri-Columbia, Columbia, Missouri 65211, USA.
authors.forename: Nagavarakishore
authors.initials: N
authors.lastname: Pillarsetty
authors.forename: Kannan
authors.initials: K
authors.lastname: Raghuraman
authors.forename: Charles L
authors.initials: CL
authors.lastname: Barnes
authors.forename: Kattesh V
authors.initials: KV
authors.lastname: Katti
mesh_terms: D002614:Chelating Agents / Q000138:chemical synthesis / Q000737:chemistry*; D018360:Crystallography, X-Ray; D015195:Drug Design; D006860:Hydrogen Bonding; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D009942:Organometallic Compounds / Q000737:chemistry; D010720:Phosphines / Q000138:chemical synthesis / Q000737:chemistry*; D012211:Rhenium / Q000737:chemistry; D013237:Stereoisomerism; D014414:Tungsten / Q000737:chemistry
chemical_list: D002614:Chelating Agents; D009942:Organometallic Compounds; D010720:Phosphines; D012211:Rhenium; D014414:Tungsten