Preparation of Pyrazole–Pyrazolate Half‐Sandwich Complexes of Ruthenium and Osmium
作者:Gabriele Albertin、Stefano Antoniutti、Jesús Castro、Soledad García‐Fontán
DOI:10.1002/ejic.201000799
日期:2011.2
[MCl(η6-p-cymene)(HRpz)L]BPh4 (1–8) and imidazole (HIm) complexes [MCl(η6-p-cymene)(HIm)L]BPh4 (9–10) [M = Ru, Os; R = H, 3-Me, 3,5-Me2; L = P(OEt)3, PPh(OEt)2, PPh2OEt, CNtBu] were prepared by allowing the dichloro compounds MCl2(η6-p-cymene)L to react with the appropriate azole in the presence of NaBPh4. Treatment of the dichloro complexes with an excess of both pyrazole and NEt3 yielded the pyrazole–pyrazolate
吡唑 (HRpz) [MCl(η6-p-cymene)(HRpz)L]BPh4 (1-8) 和咪唑 (HIm) 复合物 [MCl(η6-p-cymene)(HIm)L]BPh4 (9-10) [M = Ru, Os; R = H, 3-Me, 3,5-Me2; L = P(OEt)3、PPh(OEt)2、PPh2OEt、CNtBu]是通过让二氯化合物 MCl2(η6-p-伞花烃)L 在 NaBPh4 存在下与适当的唑反应来制备的。用过量的吡唑和 NEt3 处理二氯配合物产生吡唑-吡唑衍生物 [M(Rpz)(η6-p-cymene)(HRpz)L]BPh4 (11-14)。相反,羰基化合物 RuCl2(η6-p-cymene)(CO) 与吡唑或咪唑反应生成双唑配合物 [MCl(η6-p-cymene)(HRpz)2]BPh4 或 [MCl(η6-p-cymene) )(HIm)2]BPh4 (15–17)。配合物通过光谱(IR