Analogies between Metallaboratranes, Triboronates, and Boron Pincer Ligand Complexes

作者：Hill Anthony F^*; Lee Stephen B; Park James; Shang Rong; Willis Anthony C

来源：Organometallics, 2010, 29(21): 5661-5669.

DOI：10.1021/om100557q

The reaction of [RuRCl(CO)(PPh(3))(2)] (R = C(6)H(5), CH=CHPh) with the Yamashita-Nozaki ligand C(6)H(4){N(CH(2)PPh(2))}(2)BH (dppBH) results in facile elimination of benzene or styrene and formation of the ruthenium [PBP](-) pincer complex [Ru{kappa(3)B,P,P'-dppB)Cl(CO)(PPh(3))] via a stepwise sequence that recalls the formation of the ruthenaboratrane [Ru(CO)(PPh(3)){B(mt)(3)}] (mt = methimazolyl) from [RuRCl(CO)(PPh(3))(2)] and Na[HB(mt)(3)]. This analogy is explored herein, including observations regarding notionally similar processes for triboronate ligands. Thus, while the major product of the reaction of [Ru(C(6)H(5))Cl(CO)(PPh(3))(2)] with ['' Bu(4)N][B(3)H(8)] is the phenylruthenatetraborane [B(3)H(8)Ru(C(6)H(5))(CO)(PPh(3))(2)], the hydrido complex [B(3)H(8)RuH(CO)(PPh(3))(2)] is also obtained, consistent with alcoholic transfer hydrogenation of the putative complex [B(3)H(7)Ru(CO)(PPh(3))(2)].

• 出版日期2010-11-8