摘要:
The reaction between 1-boranyl-1,3,5-triaza-7-phosphaadamantane ligand N-B-PTA(BH(3)) and [Cp*RhCl(mu-Cl)](2) affords [Cp*Rh{N-B-PTA(BH(3))}Cl(2)] (3) or [Cp*Rh{N-B-PTA(BH(3))}(2)Cl]Cl (5) containing one or two P-bonded boronated PTA ligands. The hydride [Cp*Rh{N-B-PTA(BH(3))}H(2)] (8) was also obtained by reaction of 3 with NaBH(4) and alternatively by direct hydroboration of [Cp*Rh(PTA)Cl(2)] with excess NaBH(4). Moderately slow hydrolysis of the N-boranyl rhodium complexes affords dihydrogen, H(3)BO(3) and the corresponding PTA derivatives, including the water-soluble dihydride [Cp*Rh(PTA)H(2)] (9). Finally, the reaction of 8 with electron poor alkynes gives the alkene complexes [Cp*Rh{N-B-PTA(BH(3))}(eta(2)-CH(2) = CHR)] (R = Ph, 10; C(O)OEt, 11) as a mixture of rotamers eta(2)-coordinated to rhodium without affecting the N-BH(3) moiety. The X-ray crystal structures of 3 and 10 were also obtained and are here discussed. (C) 2008 Elsevier B. V. All rights reserved.