Amine Attack on the Carbonyl Ligands of the Protonated Dicyclopentadienyl-Bridged Diruthenium Complex [{(η<sup>5</sup>-C<sub>5</sub>H<sub>3</sub>)<sub>2</sub>(SiMe<sub>2</sub>)<sub>2</sub>}Ru<sub>2</sub>(CO)<sub>4</sub>(μ-H)]<sup>+</sup>
作者:Maxim V. Ovchinnikov、Ilia A. Guzei、Robert J. Angelici
DOI:10.1021/om000825h
日期:2001.2.1
Complexes [(η5-C5H3)2(SiMe2)2}Ru2(CO)4(μ-H)]+ (1H+BF4-, 1D+TfO-), with a protonated Ru−Ru bond, were prepared by protonation of (η5-C5H3)2(SiMe2)2}Ru2(CO)4 (1) with HBF4·Et2O or CF3SO3D. The bridging proton in 1H+ is removed only very slowly by amine bases even though it is thermodynamically acidic (pKaAN = 6.5 (±0.2)). This remarkable kineticinertness of the bridging proton allows amines (NH3, NH2CH3
配合物[(η 5 -C 5 H ^ 3)2(森达2)2 }的Ru 2(CO)4(μ-H)] +(1 ħ + BF 4 - ,1 d + TFO - ),具有质子化的Ru-孺键,通过(η的质子化制备5 -C 5 H ^ 3)2(森达2)2孺} 2(CO)4(1)与HBF 4 ·的Et2 O或CF 3 SO 3在D.桥接质子1 H ^ +仅由胺碱,即使它是热力学上除去酸性非常缓慢地(P ķ一个AN = 6.5(±0.2))。桥联质子的这种显着的动力学惰性使胺(NH 3,NH 2 CH 3,NH(CH 3)2,吗啉,哌啶,吡咯烷)与1 H +反应,方法是攻击CO配体以生成甲酰胺(HC(O)NR 2)和CO -取代的产物(η 5 -C 5 H ^3)2(SiMe 2)2 } Ru 2(CO)3(NHR 2)(2)。因此,金属-金属键在1 H +中的质子化促进了CO配体的反应,这在未质子化的1
Synthesis and structures of binuclear half-sandwich cobalt (III) ortho-carboranedithiolato complexes with silyl-bridged bis(cyclopentadienyl) ligands
作者:Xiu-Feng Hou、Peng-Cheng Zhang、Shu Liu、Hui Wang、Yue-Jiang Lin、Guo-Xin Jin
DOI:10.1016/j.jorganchem.2007.07.046
日期:2008.4
centers with halide or 1,2-dicarba-closo-dodecaborane-1,2-dithiolato ligands. For the (η5-C5H4)2SiMe2 complexes, coordination of the fragments CpCo favors a exo conformation. With the rigid structure of the di-bridged ligand (C5H4)2(SiMe2)2, only cis isomers of the corresponding (η5-C5H3)2(Si2Me2)2 complexes are formed. All the complexes have been well characterized by elemental analysis, NMR and IR spectra
五双核半夹心钴络合物,[(η 5 -C 5 H ^ 4)的Co(CO)我2 ] 2森达2(3),[(η 5 -C 5 H ^ 4)钴(S 2 c ^ 2乙10 ħ 10)] 2森达2(4),[(η 5 -C 5 H ^ 4)] 2共2(μ 2 -S 2 c ^ 2乙10 ħ 10)森达2(5),[(η 5 -C 5 H ^ 3)的Col 2 ](μ-I)[(η 5 -C 5 H ^ 3)的Co(CO)I](森达2)2(8), [(η 5 -C 5 H ^ 3)共(S 2 c ^ 2乙10 ħ 10)] 2(森达2)2(9),被成功地在适中的产率通过相应的配体的反应合成,(C 5 H ^ 5)2 SiMe 2(1)和(C 5 H 4)2(SiMe 2)2(6)。的分子结构3,5,6,8和9,通过X射线晶体分析,这清楚地描绘包含Cp环和用卤化物或1,2- dicarba-金属中心各种分子结构决定闭合碳-dodecaborane-1
Reactions of Doubly SiMe<sub>2</sub>-Bridged Bis(cyclopentadienyl) Complexes of Molybdenum and Iron Carbonyls: Competitive Ring-to-Metal Migrations of Hydrogen and SiMe<sub>2</sub>
Reaction of the doubly bridged bis(cyclopentadiene) (C5H4(SiMe2))2 (1) with Mo(CO)6 in refluxing xylene gave the corresponding dinuclear molybdenum carbonyl complex [(η5-C5H3)2(SiMe2)2]Mo2(CO)6 (3) and the desilylated product [(η5-C5H4)2(SiMe2)]Mo2(CO)6 (6), together with the singly SiMe2SiMe2-bridged dinuclear molybdenumproduct [(η5-C5H4)2(SiMe2SiMe2)]Mo2(CO)6 (5) and the novel complex [(SiMe2)(η5-C5H4)Mo(CO)3]2
所述双桥联双反应(环戊二烯)(C 5 H ^ 4(森达2))2(1)用的Mo(CO)6在回流的二甲苯,得到相应的双核钼羰基络合物[(η 5 -C 5 H ^ 3)2(森达2)2 ]的Mo 2(CO)6(3)和脱甲硅基化产物[(η 5 -C 5 H ^ 4)2(森达2)]的Mo 2(CO)6(6),与单独使用森达一起2森达2 -bridged双核钼产物[(η 5 -C 5 H ^ 4)2(森达2森达2)]的Mo 2(CO)6(5)和新的配合物[(森2)(η 5 -C 5 H ^ 4)的Mo(CO)3 ] 2(4)含有两个沫-Si键。产物的这种多样性是由氢和SiMe 2的类似的环到金属迁移能力引起的群体及其在反应过程中的竞争性迁移。的二氢化物反应的顺式- [(η 5 -C 5 H ^ 3)2(森达2)2 ]的Mo 2(CO)6(H)2(图7C)在回流的二甲苯也得到上述产品,除了4,这表明图7c
Synthesis and reactivity of new mixed dicyclopentadienyl Group 4 metal complexes with the doubly bridged bis(dimethylsilanediyl)-cyclopentadiene-(η5-cyclopentadienyl) ligand
作者:Roberto Gómez-Garcı́a、Pascual Royo
DOI:10.1016/s0022-328x(99)00111-4
日期:1999.6
The monocyclopentadienyl titanium complex [Ti(C5H4)(SiMe2)2(η5-C5H3)} Cl3] 3 and the dichloro mixed dicyclopentadienyl Group 4 metal complexes [M(η5-C5R5)(C5H4)(SiMe2)2(η5-C5H3)} Cl2] (R=H; M=Ti 4, Zr 5, Hf 6; R=Me; M=Ti 7) containing the doubly bridged bis(dimethylsilanediyl)-cyclopentadiene-(η5-cyclopentadienyl) ligand were prepared in high yields by reaction of the monolithium salt Li[(C5H4)(SiMe2)2(C5H3)]
单环戊二烯基钛配合物[钛(C 5 H ^ 4)(森达2)2(η 5 -C 5 H ^ 3)}氯3 ] 3和二氯二环戊二烯基混合4种族金属配合物[M(η 5 -C 5 - [R 5)(C 5 H ^ 4)(森达2)2(η 5 -C 5 H ^ 3)}氯2 ](R = H; M =的Ti 4,Zr的5,HF 6 ; R =甲基; M =钛7)含有双重桥连的双(二甲基硅烷二)-cyclopentadiene-(η 5 -环戊二烯基)配位体进行了以高收率由单锂盐的反应而制备的Li [(C 5 H ^ 4)(森达2)2(C 5 H ^ 3)]分别具有等摩尔量的TiCl 4或单环戊二烯基络合物[Cp'MCl 3 ]。与得到氯代各种烷基化剂的氯络合物的反应[M(η 5 -C 5 H ^ 5)(C 5 H ^ 4)(森达2)2(η 5 -C 5 H ^ 3)} CLR](M = Ti中R =我8,等9
Two nickelocenes and ferrocene in a rigid cis/trans chain
作者:Martin Herker、Frank H. Köhler、Markus Schwaiger、Bernd Weber
DOI:10.1016/s0022-328x(02)01674-1
日期:2002.9
conformation of bridged paramagnetic metallocenes and the conformation-dependent electron spin delocalization therein, a trimetallic model compound was synthesized. First, a nickelocene bonded to cyclopentadienyl (Cp) anion by two SiMe2 groups was made in three steps. Further reaction with solvated iron dichloride gave a trimetallic metallocene (6) that had the metal sequence NiFeNi. X-ray crystal analysis