Rhenium(I) Tricarbonyl Complexes with Poly(azolyl)borates Generated in Situ from an Organometallic Precursor Containing the B−H···Re Coordination Motif

详细信息    查看全文

• 作者：Margarida Videira ; Carolina Moura ; Amitabha Datta ; Antnio Paulo ; Isabel C. Santos ; I. Santos
• 刊名：Inorganic Chemistry
• 出版年：2009
• 出版时间：May 4, 2009
• 年：2009
• 卷：48
• 期：9
• 页码：4251-4257
• 全文大小：190K
• 年卷期：v.48,no.9(May 4, 2009)
• ISSN：1520-510X

文摘

Complex fac-[Re(κ³-H(μ-H)₂B(tim^Me))(CO)₃] (1) reacts with protic azoles, like 2-mercapto-1-methylimidazole (tim^MeH), 2-mercaptobenzothiazole (bztH), or pyrazoles (pz*H), to afford fac-[Re(κ³-H(μ-H)B(tim^Me)₂(CO)₃] (2), fac-[Re(κ³-H(μ-H)B(tim^Me)(bzt))(CO)₃] (3), fac-[Re(κ³-H(μ-H)B(tim^Me)(pz))(CO)₃] (4), fac-[Re(κ³-HB(tim^Me)(pz)₂)(CO)₃] (5), and fac-[Re(κ³-H(μ-H)B(tim^Me)(3,5-Me₂-4-EtOOCCH₂pz))(CO)₃] (6). Complexes 2−6 are stabilized by tridentate poly(azolyl)borates generated in situ, and their formation involves most probably a metal-assisted process which is considerably faster for the pyrazole derivatives. The characterization of the novel complexes, 3−6, has been done by common analytical techniques, including single crystal X-ray diffraction analysis. The solid state structures confirmed the presence of hybrid heteroscopionates, presenting (κ³-H, S, S′), (κ³-H, S, N), or (κ³-S, N, N) binding motifs. Multinuclear (¹H, ¹³C, and ¹¹B) NMR studies have also shown that the coordination mode found in the solid state is retained in solution.