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- W2014009235 endingPage "2023" @default.
- W2014009235 startingPage "2016" @default.
- W2014009235 abstract "Carbon−carbon bond cleavage of biphenylene was achieved with (C5Me5)M(C2H4)2 (M = Rh, Co) to give the bimetallic species (C5Me5)2M2(2,2‘-biphenyl). The isomorphous solid state X-ray structures of these complexes showed the biphenyl substrate to be σ-coordinated to one metal and η4-bound to the other. These complexes display dynamic behavior, interchanging the σ- and π-bonding. Variable-temperature NMR studies were performed on both binuclear species, and the energy barrier for interconversion of the two (C5Me5) fragments was calculated to be ΔG⧧ (350 K) = 16.8 kcal/mol and ΔG⧧ (248 K) = 11.4 kcal/mol for the rhodium and cobalt complexes, respectively. (C5Me5)2Rh2(2,2‘-biphenyl) reacted with CO to give (C5Me5)Rh(CO)2 and (C5Me5)Rh(CO)(2,2‘-biphenyl), while the cobalt analog gave (C5Me5)Co(CO)2 and fluorenone. (C5Me5)2Co2(2,2‘-biphenyl) gave (C5Me5)Co(PMe3)2 and (C5Me5)Co(PMe3)(2,2‘-biphenyl) when reacted with PMe3, as determined by X-ray crystallography of the latter complex. Both complexes were found to be resistant to hydrogenation." @default.
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- W2014009235 date "1997-05-01" @default.
- W2014009235 modified "2023-10-16" @default.
- W2014009235 title "C−C Activation in Biphenylene. Synthesis, Structure, and Reactivity of (C<sub>5</sub>Me<sub>5</sub>)<sub>2</sub>M<sub>2</sub>(2,2‘-biphenyl) (M = Rh, Co)" @default.
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- W2014009235 doi "https://doi.org/10.1021/om961059a" @default.
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