A Better Synthesis of Biruthenocene and Molecular Structures of [Ru<sup>II</sup>Cp(C<sub>5</sub>H<sub>4</sub>C<sub>5</sub>H<sub>4</sub>)CpRu<sup>IV</sup>NCC<sub>2</sub>H<sub>5</sub>](BF<sub>4</sub>)(B<sub>2</sub>F<sub>7</sub>)CH<sub>3</sub>NO<sub>2</sub>, [Ru<sup>II</sup>Cp(2,2′-bipyridine)(<b><i>p</i></b>-benzoquinone)]BF<sub>4</sub>and Related Salts
作者:Masanobu Watanabe、Masaru Sato、Akira Nagasawa、Masahiro Kai、Izumi Motoyama、Toshio Takayama
DOI:10.1246/bcsj.72.715
日期:1999.4
An interesting dimerization occurred during the oxidation of ruthenocene with an excess of p-benzoquinone containing BF3·Et2O (abbreviated p-Bq/BF3) in a mixed solution of benzene and hexane, which gave biruthenocenium(BF4)2 (A) in 89% yield. Reduction of A with TiCl3 gave biruthenocene in a good yield (68% from ruthenocene), which is the most elegant preparation of biruthenocene. Recrystallization of A from CH3NO2 containing C2H5CN gave a mixed-valence salt 3 formulated as [RuIICp(C5H4C5H4)CpRuIVC2H5CN](BF4)(B2F7)CH3NO2 in which C2H5CN coordinated to the RuIV center. The crystal of 3 was found to be monoclinic, space group P21/a, a = 9.8930(8), b = 15.445(3), c = 19.728(3)Å, β = 92.57(1)°, V = 3011.3(1) Å3, Z = 4, and the final R = 0.075and Rw = 0.093. Recrystallization of A from CH3NO2 containing 2,2′-bipyridine and p-benzoquinone gave a yellow planar salt 4 formulated as [RuIICp(2,2′-bipyridine)(p-benzoquinone)]BF4 in which the olefin moiety of p-benzoquinone coordinated to the RuIV center in η2-form. Salt 4 was also synthesized by the reaction of bromoruthenocenium (BF4) with p-benzoquinone and 2,2′-bipyridine in CH3NO2. The crystal of 4 was found to be monoclinic, space group P21, a = 8.516(3), b = 9.934(4), c = 11.995(4) Å, β = 103.78(1)°, V = 985.6(6) Å3, Z = 2, and the final R = 0.040 and Rw = 0.050. The same p-Bq/BF3 oxidation of osmocene gave an orange red salt 5 formulated as [Cp2OsIVFBF3]BF4 in which one of the F− atom of the BF4− ion coordinated to the OsIV center. The crystal of 5 was found to be monoclinic, space group P21/c, a = 8.065(1), b = 12.048(1), c = 16.730(2) Å, β = 94.497(8)°, V = 1620.6(3) Å3, Z = 4, and the final R = 0.055 and Rw = 0.070.
在苯和己烷的混合溶液中,用过量含有
BF3-Et2O(简称 p-Bq/ )的
对苯醌氧化钌烯时,发生了有趣的二聚反应,得到了桦
钌烯(
BF4)2 (A),收率为 89%。用 TiCl3 还原 A 得到桦
钌烯,收率很高(68% 来自
钌烯),这是最优雅的桦
钌烯制备方法。从含有 C2H5CN 的
CH3NO2 中重结晶 A,得到了一种混合价盐 3,配制成 [RuIICp(C5H4C5H4)CpRuI
VC2H5CN]( )(B2F7) ,其中 C2H5CN 与 RuIV 中心配位。发现 3 的晶体为单斜晶系,空间群为 P21/a,a = 9.8930(8),b = 15.445(3),c = 19.728(3)埃,β = 92.57(1)°,V = 3011.3(1) Å3,Z = 4,最终 R = 0.075 和 Rw = 0.093。从含有 2,2′-联
吡啶和
对苯醌的 中重结晶 A,得到了一种黄色的平面盐 4,配制成[RuIICp(2,2′-联
吡啶)(
对苯醌)] ,其中
对苯醌的烯烃分子以 η2- 形式配位到 RuIV 中心。盐 4 也是通过
溴钌( )与
对苯醌和 2,2′-联
吡啶在 中反应合成的。发现 4 的晶体为单斜晶系,空间群为 P21,a = 8.516(3),b = 9.934(4),c = 11.995(4)埃,β = 103.78(1)°,V = 985.6(6) Å3,Z = 2,最终 R = 0.040 和 Rw = 0.050。用同样的 p-Bq/ 氧化
锇原烯,得到了一种橙红色的盐 5,配制成 [Cp2OsIVF ] ,其中 离子的一个 F 原子与 OsIV 中心配位。发现 5 的晶体为单斜晶系,空间群为 P21/c,a = 8.065(1),b = 12.048(1),c = 16.730(2)埃,β = 94.497(8)°,V = 1620.6(3) Å3,Z = 4,最终 R = 0.055 和 Rw = 0.070。