Carbon-Carbon Bond-Forming Reaction through a .eta.5-Pentadienylchromium Complex
摘要:
Arene.Cr(CO)(3)-mediated coupling reactions of pentadienyl esters (7a-d, 11, and 13) with carbonyl compounds via eta(5)-pentadienylchromium intermediates gave the gamma-adducts regioselectively.
作者:Simon Lotz、Minet Schindehutte、Marthie M. van Dyk、Jan L.M. Dillen、Petrus H. van Rooyen
DOI:10.1016/0022-328x(85)88072-4
日期:1985.11
A carbonyl ligand of π-arenetricarbonylchromiun(0) complexes is photochemically displaced to give π-arenedicarbonyl complexes of chromium(0) with thio-ether ligands. In contrast, irradiation of π-arenetricarbonylchromium compounds with dithio-ester and trithiocarbonate ligands yields only pentacarbonyl complexes. Substitution of the π-arene ring, the thio-ether ligand, or both, is easily achieved at
Solvent and Structural Effects on Ultrafast Chelation Dynamics of Arene Chromium Tricarbonyl Sulfide Derivatives
作者:Tung T. To、Edwin J. Heilweil、Charles B. Duke、Theodore J. Burkey
DOI:10.1021/jp071172m
日期:2007.8.1
Cr-NCCH3 solvate exclusively within 50 ps following irradiation in acetonitrile. The solvent effect on chelation is in striking contrast to that previously reported for the analogous RCpMn(CO)3 derivatives, 4-6. In acetonitrile, only chelation is observed for the Mn series and only solvent coordination is observed for the Cr series, but in heptane both chelation and solvent coordination are observed
Elektronenstoss-induzierter zerfall von benzol-tricarbonyl-chrom- und -wolfram-derivaten; ein vergleich
作者:Jörn Müller、Frerk Lüdemann
DOI:10.1016/s0022-328x(00)80505-7
日期:1981.1
The Electron impact mass spectra of (CO)3 MC6H5—X complexes (M = Cr, W; X = OCH3, OC4H9, CO2CH3, CO2C4H9) were recorded. From metastable transitions and by high-resolution measurements complete fragmentation diagrams were obtained; in some cases comparative structure determinations of fragment ions were carried out by collisional activation. The fragmentation of the tungsten complexes considerably
(CO)3 MC 6 H 5 -X配合物(M = Cr,W; X = OCH 3,OC 4 H 9,CO 2 CH 3,CO 2 C 4 H 9)的电子冲击质谱)进行记录。从亚稳转变和高分辨率测量获得完整的碎片图。在某些情况下,碎片离子的比较结构测定是通过碰撞活化进行的。钨配合物的碎裂与铬化合物的碎裂显着不同。差异可以归因于较强的亲电特性以及钨达到较高氧化态的更明显的趋势。
The study of catalyst effects on the complexation of arenes with Cr(CO)6. An overview
作者:Milan Hudček、Vladimir Gajda、Štefan Toma
DOI:10.1016/0022-328x(91)80046-m
日期:1991.8
The results from our thorough investigation of different catalystic effects on the rate and yields of complexation of arenes with Cr(CO) are presented with a short review of the subject. With decalin as solvent the following substances were found to be the best catalysts: butyl acetate, ethyl formate, and dimethyl succinate. Butyl acetate proved to be the catalyst also in-di-n-butyl ether. Special
Electronic Structure and Excited-State Dynamics of the Molecular Triads: <i>trans</i>-M<sub>2</sub>(T<sup><i>i</i></sup>PB)<sub>2</sub>[O<sub>2</sub>CC<sub>6</sub>H<sub>5</sub>-η<sup>6</sup>-Cr(CO)<sub>3</sub>]<sub>2</sub>, Where M = Mo or W, and T<sup><i>i</i></sup>PB = 2,4,6-triisopropylbenzoate
作者:Samantha E. Brown-Xu、Malcolm H. Chisholm、Christopher B. Durr、Terry L. Gustafson、Vesal Naseri、Thomas F. Spilker
DOI:10.1021/ja310651y
日期:2012.12.26
From the reactions between M(2)(T(i)PB)(4) and HO(2)CC(6)H(5)-η(6)-Cr(CO)(3) (2 equiv), the title compounds trans-M(2)(T(i)PB)(2)[O(2)CC(6)H(5)-η(6)-Cr(CO)(3)](2), where M = Mo or W, and T(i)PB = 2,4,6-triisopropylbenzoate have been prepared and characterized. Compound I (M = Mo) was characterized by a single crystal X-ray structural determination which revealed a centrosymmetric MoMo quadruply bonded
从 M(2)(T(i)PB)(4) 和 HO(2)CC(6)H(5)-η(6)-Cr(CO)(3) (2 equiv) 之间的反应,标题化合物反式-M(2)(T(i)PB)(2)[O(2)CC(6)H(5)-η(6)-Cr(CO)(3)](2),其中M = Mo 或 W,并且 T(i)PB = 2,4,6-苯甲酸三异丙酯已被制备和表征。化合物 I (M = Mo) 通过单晶 X 射线结构测定表征,其揭示了中心对称的 MoMo 四重键合分子。由于强烈的金属到配体电荷转移 (MLCT),化合物 I 是红色的,而钨配合物 II 是蓝色的,主要是 M(2)δ 到苯甲酸 π* 与一些铬 t(2g) 参与,根据采用密度泛函理论的计算。化合物 I 显示来自分别指定为 (1) MLCT 和 (3) MoMoδδ* 的 S(1) 和 T(1) 状态的双重发射。两种配合物都已通过时间分辨红外光谱 (TRIR)