TABLE OF CONTENTSVolume 20 Issue 5 , Pages 305 - 356 (May 2006)
ContentsContents (p i-iii)
Published Online: May 1 2006 6:44AM
DOI: 10.1002/aoc.1094
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Materials, Nanoscience and CatalysisHydrothermal synthesis of the fist two-dimensional folded layer formed by a cyano-bridged one-dimensional chain joined by Cu(I) Cu(I) bonding (p 305-309) Xiong-Bin Chen, Yi-Zhi Li, Xiao-Zeng You Published Online: Mar 29 2006 3:35AM
DOI: 10.1002/aoc.1043
| | | In the context molecular structures of tow complexes, [Cu3(CN)3(phen)] (1) and [Cu (CN)(phen)]n (2) (phen = 1,10-phenalonine), were determined. Compound 1 contains three-coordinate Cu(CN)2 sites, four-coordinate Cu(CN)3 sites and three coordinate Cu(CN)(phen) sites, where Cu atoms present a triangular planar geometry and a distorted tetrahedron geometry , respectively. It is notable that the twist 1D infinite chain forms through two CN- ions of these three ones as the bridges to alternately link the tetrahedron geometry Cu and the three-coordinate Cu sites. The remaining one CN- ion projects from the chain and further coordinates to a [Cu(phen)+] side arm. In addition, 1D infinite chains are held together by Cu Cu interaction resulting in 2D infinite folded layers of hexagonal meshes with [Cu1(CN)(phen)] groups projecting from the chains. Furthermore, Owing to the interdigitation of the neighboring phen rings, 2D layers stack orderly on the c-axis leading to 3D networks with large heart-like channels filled with the coordinated phen. The structure of 2 consists of an infinite helix chain formed by Cu(phen)+ unit joined by CN- groups. | | |
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Homoleptic lanthanide metallocenes and their derivates: syntheses, structural characterization and their catalysis for ring-opening polymerization of -caprolactone (p 310-314) Hongmei Sun, Shuang Chen, Yingming Yao, Qi Shen,aibei Yu Published Online: Apr 20 2006 7:06AM
DOI: 10.1002/aoc.1047
| | | Homoleptic lanthanide metallocenes such as (MeCp)3Ln [Ln = Y (1), Er (2), Sm (3)] and Cp3Ln [Ln = Er (4) and Sm (5)] have been found to be a novel type of initiators for the ring-opening polymerization of -caprolactone ( -CL). In addition, a novel neutral trifluoroethoxo yttrium complex [(MeC5H4)2Y(µ-OCH2CF3)]2 (6) has been synthesized by the reaction of 1 with trifluoroethanol in 1:1 molar ratio and characterized by single-crystal X-ray structural analysis. Preliminary study shows that the catalytic activity of complex 1 is higher than that of complex 6. | | |
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Design and spectroscopic study of new ruthenium(II) complexes containing ligands derived from terpyridine and dipyrido[3,2-a:2 ,3 -c]phenazine: {Ru(4 -Rph-tpy) [dppz(COOH)]Cl}PF6 with R = NO2, Br, Cl (p 315-321) R. López, S. A. Moya, C. Zúñiga, M. Yáñez, J. C Bayón, P. Aguirre Published Online: May 1 2006 6:44AM
DOI: 10.1002/aoc.1050
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Active ruthenium-(N-heterocyclic carbene) complexes for hydrogenation ofetones (p 322-327) Murat Yi it, Beyhan Yi it, smail Özdemir, Engin Çetinkaya, Bekir Çetinkaya Published Online: Mar 27 2006 3:57AM
DOI: 10.1002/aoc.1054
| | | Four ruthenium-N-heterocyclic carbene complexes (3-6) have been prepared and the new compounds characterized by C, H, N analyses, 1H-NMR and 13C-NMR. The reduction ofetones to alcohols via transfer hydrogenation was achieved with catalytic amounts of complexes 3-6 in the presence of t-BuOK. | | |
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Efficient iridium and rhodium-catalyzed asymmetric transfer hydrogenation using 9-amino(9-deoxy) cinchona alkaloids as chiral ligands (p 328-334) Wei He, Peng Liu, Bang Le Zhang, Xiao Li Sun, Sheng Yong Zhang Published Online: Mar 27 2006 3:57AM
DOI: 10.1002/aoc.1055
| | | 9-Amino (9-deoxy) cinchona alkaloids, 2a-2d, derived from natural cinchona alkaloids, were applied in asymmetric transfer hydrogenation in both iridium and rhodium catalytic systems using i-propanol as the hydrogen source. A series of aromaticetones was examined, and good to excellent conversions and enantioselectivities were observed. The best results were achieved using 9-amino(9-deoxy) epicinchonine 2a as the ligand and [Ir(COD)Cl]2 as the metal precursor. | | |
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A new rhodium complex with a nitrogen-containing bis(phosphine oxide) ligand as an efficient catalyst for the hydroformylation of styrene (p 335-337) Evangelos I. Tolis,alliopi A. Vallianatou, Fotini J. Andreadaki, Ioannis D.ostas Published Online: Mar 27 2006 3:57AM
DOI: 10.1002/aoc.1057
| | | A new rhodium complex with a nitrogen-containing bis(phosphine oxide) ligand has been synthesized, and applied to hydroformylation of styrene displaying higher activity and regioselectivity towards the branched aldehyde than the bis(phosphine) analogue. | | |
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Crystal structure of chiral binaphthol lanthanide complexes and their catalysis in asymmetric transfer hydrogenation of acetophenone (p 338-343) Pengfei Yan, Chunhong Nie, Guangming Li, Guangfeng Hou, Wenbin Sun, Jinsheng Gao Published Online: Apr 7 2006 4:28AM
DOI: 10.1002/aoc.1058
| | | Heterometallic [(THF)2Na]3 [Ln(R-Binolate)3(H2O)] [Ln = Sm (1) and Gd (2)] have been synthesized by reactions of either LnCl3 or LnBr3 with 3 equiv. Na(R-HBinolate) and characterized by X-ray crystallographic analysis. When complexes 1 and 2 were employed as catalysts in the MPV reaction of acetophenone, the S-phenylethanol was separated in 94 and 85% enantiomeric excess (e.e.) for 1 and 2, respectively. | | |
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Synthesis and characterization of some novel organometallic aromatic polyamides (p 344-350) Naseer Iqbal, Zareen Akhter, M. Adnan Saeed, Muhammad Saif ullahhan Published Online: Apr 20 2006 7:06AM
DOI: 10.1002/aoc.1061
| | | Three aromatic diamines were prepared by reacting 2, 6-dihydroxytoluene, bisphenol-A and 4,4 -dihydroxybiphenyl with p-nitrobenzylchloride, which was then polymerized with 1,1 -ferrocenedicarboxylic acid chloride following a low-temperature solution polycondensation method to yield organometallic aromatic polyamides (aramids). The synthesized monomers and polymers were characterized by their solubilities, elemental analysis, FTIR spectroscopy and 1H-NMR spectroscopy. The inherent viscosities, differential scanning calorimetry and thermogravimetry were also used for polymer characterization. | | |
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Cu(II) and Ni(II)-1,10-phenanthroline- 5,6-dione-amino acid ternary complexes exhibiting pH-sensitive redox properties (p 351-356) Guang-Jun Xu, Ying-Yingou, Li Feng, Shi-Ping Yan, Dai-Zheng Liao, Zong-Hui Jiang, Peng Cheng Published Online: May 1 2006 6:44AM
DOI: 10.1002/aoc.1064
| |  | Two novel complexes, [Cu(phendio)a1064ga.eps (L-Phe)(H2O)](ClO4)·H2O (1) and [Ni(phendio)(Gly)(H2O)](ClO4)·H2O (2) have been synthesized and characterized. Crystal structure of [Cu(phendio)(L-Phe)(H2O)](ClO4)· H2O shows that the copper(II) ion is coordinated in a distorted square pyramidal geometry. The electrochemical properties of these complexes are pH-dependent and the reduction of coordinated phendio proceeded via the 2e-/2H+(pH < 4) and 2e-/H+(pH > 4) processes being modulated by the amino acid ligands through combining proton on the NH2 groups. | | |
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