Study of the Evolution of η<sup>1</sup>-η<sup>2</sup>-Enylpalladium Complexes When the Palladium-Migration Process Is Blocked
作者:Ana C. Albéniz、Pablo Espinet、Yong-Shou Lin
DOI:10.1021/om9707228
日期:1997.12.1
and/or isolated in the reaction of [PdPfBr(NCMe)2] (Pf = C6F5) with the dienes R−CHCH−(CH2)n−Y−(CH2)m−CHCH2 (R = H, Me; n, m = 0, 1; Y = CCl2, C(COOMe)2, CO2, O, SiMe2, SO2). Insertion of one double bond into the Pd−aryl bond and coordination of the remaining double bond gives the above-mentioned organometallic derivatives. The dienes tested have a non-hydrogen-containing link (Y), so Pd migration to give
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。
Reactivity of [M(C∧P)(acac-O,O‘)] [M = Pt, Pd; C∧P = CH<sub>2</sub>-C<sub>6</sub>H<sub>4</sub>-P(<i>o</i>-tolyl)<sub>2</sub>-κC,P; acac = 2,4-pentanedionato] toward HgX<sub>2</sub> (X = Br, I, CH<sub>3</sub>COO, CF<sub>3</sub>COO). New Polynuclear Complexes Containing Pt−Hg Bonds. Molecular Structures of [{Pt(C∧P)(acac-O,O‘)- HgBr(μ-Br)}<sub>2</sub>(μ-HgBr<sub>2</sub>)], an Unprecedented Square-Planar Bromomercurate Complex, and [{Pt(C∧P)(μ-O<sub>2</sub>CCH<sub>3</sub>)<sub>2</sub>Hg(μ<sup>3</sup>-acac<sup>2</sup><sup>-</sup>-κC<sup>3</sup>,O)Hg(O<sub>2</sub>CCH<sub>3</sub>-κO)}· CHCl<sub>3</sub>]<sub>2</sub>, the First Complex Containing Asymmetric Dimercurated Acetylacetone
作者:Irene Ara、Larry R. Falvello、Juan Forniés、Violeta Sicilia、Pablo Villarroya
DOI:10.1021/om000223y
日期:2000.8.1
revealed that these compounds contain very short platinum-to-mercury donorbonds supported by two carboxylate groups, along with an unusual dimercurated acetylacetone moiety. The reactions of [Pd(C∧P)(acac-O,O‘)] (1‘) with HgX2 (X = Br, I, CH3COO, CF3COO) proceed mainly (X = Br, CH3COO, CF3COO) with substitution of the acac-O,O‘ ligand by X from the coordination environment of the palladium center to give
Preparations and characterization of new 2-furfurylpalladium(II) complexes
作者:Masayoshi Onishi、Toshihiro Ito、Katsuma Hiraki
DOI:10.1016/s0022-328x(00)88982-2
日期:1981.4
afford [Pd(η3-CH2Fu)Cl(PPh3)] or [Pd(η1-CH2Fu)Cl(4-picoline)2], respectively. Complex I was treated with Tl(acac), AgCIO4, and Na[BPz3R] (Pz = 1-pyrazolyl, R = H or Pz) to give [Pd(η1-CH2Fu)(acac)(PPh3)], [Pd(η3-CH2Fu)-(PPh3)2]ClO4, and [Pd(η1-CH2Fu)(BPz3R)(PPh3)], respectively. These new 2-furfurylpalladium(II) complexes were characterized on the basis of elemental analysis, electric conductivity,
Palladium(II) allylic complexes by carbene transmetalation and migratory insertion reactions: Synthesis and side reactions
作者:Ana C. Albéniz、Pablo Espinet、Alberto Pérez-Mateo
DOI:10.1016/j.jorganchem.2009.10.027
日期:2010.2
New 1,1-alkoxy, aryl substituted palladium η3-allyls [Pd(μ-Br)η3-C(C6F5)(OMe)CHR1CHR2}]2 can be synthesized from [W(CO)5C(OMe)CHR1CHR2}] and a palladium perfluoroaryl complex. The allyls are formed by transmetalation of the carbene fragment followed by migratory insertion of C6F5 to the putative and highly reactive Pd carbene complex. This reaction pathway predominates in all cases, but insertion
新1,1 -烷氧基,芳基取代的钯η 3个-allyls [钯(μ-溴)η 3 -C(C 6 ˚F 5)(OME)CHR 1 CHR 2 }] 2可以由[W合成(CO )5 C(OMe)CHR 1 CHR 2 }]和钯全氟芳基配合物。通过卡宾片段的金属转移,然后将C 6 F 5迁移插入推定的高反应性Pd卡宾配合物中,形成烯丙基。在所有情况下,该反应途径均占主导地位,但将烷氧基乙烯基碳烯钨的双键插入Pd–C 6 F 5中键导致次级产物,即C 6 F 5(OMe)C CR 1 CH(C 6 F 5)R 2。