Synthesis, Molecular Structure, and Reactivity of Neutral and Cationic Areneosmium(II) Complexes with Diarylcarbenes as Ligands
作者:Birgit Weberndörfer、Gerhard Henig、D. C. R. Hockless、Martin A. Bennett、Helmut Werner
DOI:10.1021/om0207109
日期:2003.2.1
(38). The bis(trifluoroacetato) derivatives 14, 15, and 17 react in acetone with water to afford the diaryl(carbonyl)osmium(II) complexes [(η6-mes)OsR2(CO)] (39−41). On the basis of a labeling experiment, a mechanism for this unusual C−C cleavage reaction is proposed. The reaction of the dichloro compounds 28 and 29 with PPh3 in the presence of AgPF6 gives the cationic carbene complexes [(η6-mes)OsCl(PPh3)(CR2)]PF6
Ferrocenyloxazoline-Derived Planar Chiral Palladacycles: C–H Activation, Transmetalation, and Reversal of Diastereoselectivity
作者:Ross A. Arthurs、David L. Hughes、Christopher J. Richards
DOI:10.1021/acs.organomet.9b00551
日期:2019.11.11
resulting S,Sp palladacycle. A similar 4:1 dr was obtained using Na2PdCl4 in MeOH. As an alternative approach, highlydiastereoselectivelithiation (dr >100:1) and transmetalation were investigated. Addition of PdX2(COD) (X = Cl, Br) to (S,Rp)-2-lithio-1-(2′-(4′-methylethyl)oxazolinyl)ferrocene resulted in double halide substitution and formation of cis-(S,S,Sp,Sp)-bis[2-(2′-(4′-methylethyl)oxazolinyl)ferrocene-1-C
发现(S)-2-二茂铁基-4-(甲基乙基)恶唑啉与Pd(OAc)2在CH 2 Cl 2中的重合进行了3.6:1的dr进行研究,有利于生成的S,S p palladacycle。使用Na 2 PdCl 4在MeOH中的溶液获得相似的4:1 dr 。作为一种替代方法,研究了高度非对映选择性锂化(dr> 100:1)和金属转移。在(S,R p)-2-lithio-1-(2'-(4'-甲基乙基)恶唑啉基)二茂铁中添加PdX 2(COD)(X = Cl,Br)导致双卤化物取代并形成顺式-(S,S,S p,S p)-双[2-(2'-(4'-甲基乙基)恶唑啉基)二茂铁-1- C,3' - N ]钯(II)(X = 42% Cl,X = Br的50%)。用HCl选择性地单原钯制得含有可移动的二茂铁基恶唑啉配体的S,S p palladacycle。将PdCl 2(MeCN)2加到乙腈中的硫醇环中,本身是由
Cyclometalated Platinum(II) Complexes with Donor‐Acceptor‐Containing Bidentate Ligands and Their Application Studies as Organic Resistive Memories
Cyclometalated platinum(II) complexes with various donor-acceptor moieties have been synthesized and structurally characterized. The photophysical behaviors of the complexes are highly sensitive to the modulation of the donor and acceptor moieties. The donor-acceptor couple is also crucial to stabilize the field-induced charge-transfer state in the resistive memories based on this class of complexes, leading
已经合成了具有各种供体-受体部分的环金属化铂 (II) 配合物并对其进行了结构表征。复合物的光物理行为对供体和受体部分的调制高度敏感。施主 - 受主对稳定基于此类复合物的电阻存储器中的场致电荷转移状态也至关重要,从而导致器件的低开关阈值电压、高开/关比和高耐用性。
Bis(β-diketonato)-palladram(II) and -platinum(II) Complexes
the platinum(II) complexes are quite inert. The mixed-ligand chelates are stable in solution, showing no sign of disproportionation. The isomeric pairs of bis(1-phenyl-1,3-butanedionato)palladium(II), bis(2,4-hexanedionato)palladium(II), and bis(1,1,1-trifluoro-2,4-pentanedionato)platinum(II) were isolated, and molecular structure of the cis isomer of the first complex was determined by X-ray analysis
已经制备了许多钯(II)和铂(II)双螯合物,它们含有一种对称或不对称的β-二酮阴离子,或包含两种不同的β-二酮阴离子。顺式和反式异构体在不对称 β-二酮二元螯合物的溶液中的存在通过 1H 和 13C NMR 光谱证实。钯 (II) 配合物在溶液中达到平衡的几何异构化速度很快,而铂 (II) 配合物非常惰性。混合配体螯合物在溶液中稳定,没有歧化迹象。双(1-苯基-1,3-丁二酮)钯(II)、双(2,4-己二酮)钯(II)和双(1,1,1-三氟-2,4-戊二酮)的异构体对) 铂 (II) 被分离出来,第一个复合物的顺式异构体的分子结构通过 X 射线分析确定。