Dihydridobis borate

A highly fluorinated bis(pyrazolyl)borate ligand, dihydridobis(3,5-bis(trifluoromethyl)pyrazo-lyl)borate has been synthesized. The zinc triflate complex was prepared from the potassium salt of the ligand and exhibits distorted tetrahedral coordination which allows comparison of the amount of distortion, in relation to the electronic properties of substituents, with the methylated analog.165... 

Similar TRIR experiments were performed with Tp Rh(CO)2 and Bp Rh(CO)2 [Tp = hydridotris(3,5-dimethylpjn azolyl)borate Bp = dihydridobis(3,5-dimethyIpyrazolyl)borate] in liquid Xe solution at 223 K 48). From the positions of the observed transient infrared bands, it was found that the Tp species forms two xenon complexes upon photolysis, (7j -Tp )Rh(CO)Xe and (>j -Tp )Rh(CO)Xe, and that Bp Rh(CO)Xe is produced from Bp Rh(CO)2. 

BF4lrP2C3tH36, Iridium(III), diaquadihy-dridobis(triphenylphosphine)-, tetra-fluoroborate( 1 - ), 26 124 02BF4lrP2C42H44, Iridium(III), bis-(acetone)dihydridobis(triphenyl-phosphine)-, tetrafluoro-borate(l -), 26 123... 

Rash infrared kinetics of die photoebemistty of Tp Rh(CO)2 and Bp Rh(CO>2 in liquid xenon solution fTp = hydridotris(3,S [Pg.367]

A series of carbene rhodium complexes of the general composition [Rh(L)( = CRR )(ri -C5H5)] (R = R = aryl L = SbPp3 or PR3) has been prepared from the square-planar precursors [Rh(Cl)( = CRR )(L)2] and NaCsHs and their reactivity towards nucleophiles studied. The complex [BpMe2Rh(co)(pyridine)] [Bp = dihydridobis(3,5-dimethylpyrazolyl)borate] reacts with Mel to yield the novel carbene complex [HB(Me2Pz)2Rh(H)(I)(py-ridine) C(0)Me ], resulting from formal addition of Mel across the Rh-C bond concomitant with hydride transfer from B to Rh. " A series of thermally stable PCP-type rhodium carbene complexes have been prepared from dinitrogen... 

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