共查询到20条相似文献,搜索用时 31 毫秒
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Giovanni Natile Rino A. Michelin Silvia Mazzega Sbovata Roberta Seraglia 《Journal of organometallic chemistry》2005,690(8):2121-2127
The di-nitrile complexes trans-[PtCl2(NCR)2] (R = Me, Ph, CH2Ph) react with an excess of gaseous NH3 in CH2Cl2 at −10 °C to form, in high yield, the corresponding di-amidine complexes trans-[PtCl(NH3){HNC(NH2)R}2]Cl in which also one chlorine ligand has been displaced by NH3. The 1H NMR spectra in DMSO showed the formation of different species which were characterized through NOESY, TOCSY and 1H/13C heteronuclear correlations as trans-[Pt(NH3){HNC(NH2)R}2(DMSO)]Cl2 and trans-[PtCl{HNC(NH2)R}2(DMSO)]Cl. 相似文献
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Harry Adams 《Journal of organometallic chemistry》2008,693(4):709-716
Treatment of the metal carbonylate anions [CpMo(CO)2(L)]− (Cp = η-C5H5; L = PPh2Me, PPh2Et) with the electrophilic alkynes methyl propiolate or DMAD (RCCCO2Me, where R = H or CO2Me, respectively) followed by protonation affords the η3-acryloyl (1-oxoallyl) complexes [CpMo(η3-COCRCHCO2Me)(CO)(L)] (3a-d) as the major products, together with the isomeric vinyl complexes trans-[CpMo(CRCHCO2Me)(CO)2(L)] (4a-d). On the basis of the regioselectivity of the reaction, it is proposed that nucleophilic attack of the carbonylate anion occurs at the alkyne carbon bearing R; migration of the anionic vinyl ligand to a CO followed by protonation gives 3, whereas protonation without insertion gives 4. The X-ray structures of the acryloyl complex [CpMo(η3-COCHCHCO2Me)(CO)(PPh2Me)] (3b) and its vinyl isomer [CpMo(σ-CHCHCO2Me)(CO)2(PPh2Me)] (4b) have been determined. 相似文献
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Daniel Gallenkamp Anja Molter Fabian Mohr 《Journal of organometallic chemistry》2009,694(15):2380-113
A series of mono- and dinuclear gold(I) phosphine complexes of the type [Au{SeC(OMe)NPh}(P)] [P = PPh3, PTA, P(o-tolyl)3, P(p-MeOC6H4)3] and [Au2{SeC(OMe)NPh}2(μ-PP)] (PP = dppm, dppe, dppp, dppf, dppee) were prepared from the reaction of the appropriate chlorogold(I) phosphine complexes with N-phenyl-O-methylselenocarbamide in the presence of base. These new complexes were fully characterised by spectroscopic techniques and, in several cases, by X-ray crystallography. The differences in the solid-state structures of these selenium complexes were compared with those of some sulfur analogues. 相似文献
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Mono-, bis- and tris(chlorophosphaalkenyl)stibanes have been obtained from Mes∗PC(SiMe3)Li (Mes∗ = 2,4,6-tri-tert-butylphenyl) or from the phosphaalkene carbenoid Mes∗PC(X)Li (X = Cl) and SbF3, Mes∗Sb(OMes∗)F or Mes∗SbF2. Bis[chloroalkenyl]stibanes [R2CC(Cl)]2SbCl (R2C = fluorenylidene and 2,7-di-tert-butylfluorenylidene) have also been obtained from R2CC(Cl)Li and SbCl3. 相似文献
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Liang-Fu Tang Xue-Mei Zhao Zhi-Hong Zou Hai-Bin Song Yu-Ping Zhai 《Journal of organometallic chemistry》2005,690(18):4124-4131
The condensation reaction of CH3COC5H4M(CO)3SnCl3 (M = Mo or W) with PyCONHNH2 (Py = 2,3,4-pyridyl or 2-pyridylmethyl) in mild conditions yields cyclodiazastannoxides fused cyclopentadienyl M-Sn bonded organometallic heterocycle {μ-[C5H4(CH3)CN-NC(O)PyH]M(CO)3SnCl3}. The similar reaction of CH3COC5H4M(CO)3SnCl3 with ArCONHNH2 (Ar = 2-furanyl) gives complexes μ-[C5H4(CH3)CN-NC(O)Ar]M(CO)3SnCl2(H2O), in which the water molecule can be replaced by other N-donor ligands, such as pyridine or 4,4-bipyridine. Arene-bridged organometallic heterocyclic complexes μ-{[C5H4(CH3)CN-NC(O)]2C6H4}{M(CO)3SnCl2(Solvent)}2 have also been prepared by the reaction of CH3COC5H4M(CO)3SnCl3 with terephthaloyl hydrazine. In these new organometallic heterocyclic complexes, it seems that the tin atom prefers to be six-coordinate through absorbing the chloridion or solvent molecules. 相似文献
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Antonio Rodriguez-Delgado 《Journal of organometallic chemistry》2006,691(16):3490-3497
A series of chiral ansa-zirconocene ester enolate complexes incorporating C2- or Cs-symmetric ligands, including neutral rac-(EBI)ZrCl[OC(OiPr)CMe2] (1), rac-(EBI)Zr(OTf)[OC(OiPr)CMe2] (2), rac-(EBI)Zr(OTf)[OC(OMe)C(Me)CH2C(Me2)C(OiPr)O] (3), [Me2C(Cp)(Flu)]ZrMe[OC(OiPr)CMe2] (4), and cationic [Me2C(Cp)(Flu)]Zr+(THF)[OC(OiPr)CMe2][MeB(C6F5)3]− (5), have been synthesized. Within the neutral C2-ligated zirconocene ester enolate series, the chloride derivative 1 is inactive toward any methyl methacrylate (MMA) additions, the methyl derivative rac-(EBI)ZrMe[OC(OiPr)CMe2] adds cleanly only 1 equiv. of MMA, and the triflate derivative 2 can add either 1 equiv. of MMA to form the single-MMA-addition product 3 or multiple equivalents of MMA to form P(MMA). Unlike the Cs-ligated methyl cation [Me2C(Cp)(Flu)ZrMe]+, which is inactive for MMA polymerization under various conditions, the Cs-ligated ester enolate cation 5 is moderately active for polymerization of MMA and N,N-dimethylacrylamide at ambient temperature; the resulting P(MMA) has a high molecular weight of Mn = 388 000 Da but a low syndiotacticity of [rr] = 64%, and the polymerization conforms to a chain-end control mechanism. 相似文献