TABLE OF CONTENTSVolume 19 Issue 4 , Pages 411 - 582 (April 2005)Special Issue: Dedicated to the memory of Professor Colin EabornIssue Edited by Marcel Gielen
ContentContents (p i-vi)
Published Online: Mar 8 2005 5:04AM
DOI: 10.1002/aoc.910
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ForewordForeword (p 411) Marcel Gielen, Narayan S. Hosmane Published Online: Mar 3 2005 5:29AM
DOI: 10.1002/aoc.803
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ObituaryColin Eaborn Pioneer of Organosilicon Chemistry (p 412-413) Michael Lappert Published Online: Mar 3 2005 5:29AM
DOI: 10.1002/aoc.804
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Main Group Metal CompoundsThree-coordinate divalent Group 14 element derivatives and related compounds (p 414-428) Isabelle Saur, Sonia Garcia Alonso, Jacques Barrau Published Online: Mar 3 2005 5:29AM
DOI: 10.1002/aoc.876
| | | Work concerning new subvalent germanium and tin compounds supported by a -diketiminato ligand is reviewed. | | |
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Materials, Nanoscience and CatalysisMonoorganotin(IV) phosphonates (p 429-436) Vadapalli Chandrasekhar,andasamy Gopal Published Online: Mar 8 2005 5:04AM
DOI: 10.1002/aoc.858
| | | Recent progress in the assembly of monoorganotin(IV) phosphonates is reviewed. | | |
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Main Group Metal CompoundsUnprecedented self-assembled cyclic hexamer of ferrocenyldimethylsilanol, [FcSiMe2OH]6 (Fc = ( 5-C5H5)Fe( 5-C5H4)) (p 437-439) Hemant. Sharma, Francisco Cervantes-Lee, Ionel Haiduc,eith H. Pannell Published Online: Mar 8 2005 5:04AM
DOI: 10.1002/aoc.846
| | | Ferrocenyldimethylsilanol, FcSiMe2OH, Fc = ( 5-C5H5)Fe( 5-C5H4), features a hydrogen-bonded, self-assembled, cyclohexameric supermolecule with a chair conformation. | | |
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Organotin compounds: frominetics to stereochemistry and antitumour activities (p 440-450) Marcel Gielen, Monique Biesemans, Rudolph Willem Published Online: Mar 3 2005 5:29AM
DOI: 10.1002/aoc.771
| | | An overview is given of the research performed by the authors at the Université Libre de Bruxelles and the Vrije Universiteit Brussel, including theinetics, stereochemistry and mechanism of SE2 reactions at a saturated carbon atom, the synthesis of chiral organotin compounds and their configurational and optical stability, the fluxionality of trigonal bipyramidal metal atoms and the stereochemistry of SN2 reactions at tetrahedrally substituted atoms of the third, fourth or fifth period, the cytotoxicity of many series of organotin compounds and the structure and reactivity of organotin salicylaldoximate clusters. | | |
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Structural characterization of dimethyl- and di-n-butyltin(IV) 2,3-pyridinedicarboxylate in solution and in the solid state (p 451-457) Reyes García-Zarracino, Herbert Höpfl Published Online: Mar 3 2005 5:29AM
DOI: 10.1002/aoc.773
| | | Dimethyl- and di-n-butyltin(IV) 2,3-pyridinedicar boxylate have been characterized both in solution (1H, 119Sn NMR) and in the solid state (X-ray crystallography). Significant differences have been found for their structural and electronic properties in comparison to their analogs with phthalate as ligand. | | |
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The organotin industry rises to the HPV challenge (p 458-464) John M. Batt Published Online: Mar 3 2005 5:29AM
DOI: 10.1002/aoc.774
| | | In 1998, the US Environmental Protection Agency launched the High Production Volume (HPV) Challenge Program, which called for chemical manufacturers to voluntarily commit to fill gaps in basic screening-level hazard data for high volume chemicals they manufacture and to make the data available to the regulatory community as well as the public. Companies could sponsor chemicals individually or, if there were multiple manufacturers, companies could join together to form consortia to jointly sponsor work. The organotin industry, through the Stabilizer Task Force of ORTEPA, volunteered 27 organotin and related inorganic compounds for this program. This paper addresses setting up the industry effort, securing committed funding, sharing of existing data, establishing the test plans, contracting for the testing and administering the testing. It also provides an update as to where industry is in meeting its obligations. | | |
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Materials, Nanoscience and CatalysisSynthesis of chiral organotins suitable for the preparation of asymmetric heterogeneous catalysts (p 465-472) M. Belén Faraoni, Alicia D. Ayala, Virginia Vetere, Mónica L. Casella, Osmar A. Ferretti, Julio C. Podestá Published Online: Mar 3 2005 5:29AM
DOI: 10.1002/aoc.794
| | | The synthesis of organotin compounds with chiral (-)-menthyl ligands attached to the tin atom and free of epimerization by-products is reported. Also described is the preparation of some new bimetallic catalysts prepared by modifying silica-gel-supported platinum and rhodium with a chiral organotin, as well as some hydrogenation reactions using these catalysts. Full 1H, 13C, and 119Sn NMR spectra of the new organotins are reported. | | |
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Main Group Metal CompoundsSynthesis and characterization of several cephalothin derivatives modified with germanium-containing moieties (p 473-478) Yoshito Takeuchi, Yumikoase, Yoko Imafuku Published Online: Mar 3 2005 5:29AM
DOI: 10.1002/aoc.806
| | | A cepham, cephalothin (4), was modified with germanium-containing moieties. Their structures were confirmed chiefly based on electrospray ionization mass spectrometry and NMR spectroscopy and their antibacterial properties were tested. None of these exhibited activity strong enough to be used as a medicine. | | |
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Evaluation of PM3 calculations applied to organotin compounds: crystal structure of [Ph2SnCl2 (1,10-phenanthroline-5,6-dione)]·2Me2CO (p 479-487) Ricardo Bicca de Alencastro, João A. S. Bomfim, Carlos A. L. Filgueiras, R. Alan Howie, James L. Wardell Published Online: Feb 4 2005 7:53AM
DOI: 10.1002/aoc.823
| | | An evaluation of the PM3 level of calculation applied to organotin compounds has been carried out, by comparing calculated structures for 19 compounds with published experimental data. The method was also applied to the new [Ph2SnCl2(1,10-phenanthroline-5,6-dione)]·2Me2CO complex, whose crystal structure is also described. | | |
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Synthesis and some reactivity studies of germanium, tin and lead analogues of alkynes (p 488-493) Philip P. Power Published Online: Mar 8 2005 5:04AM
DOI: 10.1002/aoc.824
| | | The syntheses and reactivity of germanium, tin, and lead analogues of alkynes is summarized. Heavier group 14 alkynes are stabilized by bulky terphenyl ligands and are thermally robust crystalline solids; however, they are extremely reactive, with reactivity decreasing in the order Ge > Sn > Pb. Spectroscopy and reactivity patterns suggest that the germanium species, in particular, has considerable diradical character. This hypothesis is also supported by preliminary density functional theory calculations. | | |
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Hypercoordinated organotin triflates (p 494-499) Jens Beckmann Published Online: Mar 8 2005 5:04AM
DOI: 10.1002/aoc.828
| | | Recent advances in the chemistry of organotin triflates and related organotin cations are reviewed. Applications in synthesis and catalysis are briefly discussed. | | |
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Structure of azo dye organotin(IV) compounds containing a C,N-chelating ligand, part II, and their in vitro antifungal activity (p 500-509) Petr Novák, Antonín Ly ka, Ivana Císa ová, Vladimír Buchta, Luís Silva, Lenkaolá ová, Ale R i ka, Jaroslav Hole ek Published Online: Mar 8 2005 5:04AM
DOI: 10.1002/aoc.845
| | | Eight complexes of azo dyes and the [(2-dimethylaminomethyl)phenyl](R2)tin(IV) (R = is Ph or n-Bu) moiety were prepared and their NMR, ESI-MS, IR and UV-VIS spectra measured and X-ray structure determined. The compounds reveal the same structure in chloroform solution and in the solid state. Four compounds exist in the hydrazone tautomeric form. The central tin atoms in all compounds exist in slightly distorted trans-trigonal bipyramidal geometry. The in vitro antifungal activity of the compounds studied was comparable to similar organotin(IV) compounds and antifungal drugs in clinical use. | | |
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Di(p-tert-butylphenyl)-N,N-di-(iso-butyl)carbamoylmethylphosphine oxide and its organotin and uranyl adducts: structural and spectroscopic characterization (p 510-517) Ramesh N.apoor, Paulette Guillory, Louis Schulte, Francisco Cervantes-Lee, Ionel Haiduc, Laszlo Parkanyi,eith H. Pannell Published Online: Mar 8 2005 5:04AM
DOI: 10.1002/aoc.847
| | | The actinide complexing agent di(p-tert-butylphenyl)-N,N-di-(iso-butyl)carbamoylmethylphosphine oxide (1) has been used to form a series of complexes with Ph3SnCl (3), Me2SnCl2 (4), and Ph2SnCl2 (5). In the solid state the ligand is either monodentate (3, 4), binding through the PO unit, or bidentate (5), chelating via the PO and CO groups. In solution they are all monodentate. The uranyl complex is also reported where the ligand is bidentate in both solid state and solution. | | |
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Mixed aryl-alkyl organotin compounds, ArnMeSnCl3-n (Ar = RC6H4, R = H, ethyl, i-propyl, t-butyl; n-hexyl, n-octyl) and the effect of R upon antibiotic activity (p 518-522) Ramesh N.apoor, Paula Apodaca, Miguel Montes, Fabiola D. Gomez,eith H. Pannell Published Online: Mar 8 2005 5:04AM
DOI: 10.1002/aoc.853
| | | A series of new arylmethyl organotins, Ar3MeSn, Ar2SnMeSnCl and ArMeSnCl2, are reported. The synthetic method commences with the formation of the triarylmethyl tin compounds from MeSnCl3 via Grignard methods followed by sequential aryl group cleavage by HCl-Et2O. The Ar2MeSnCl and previously reported ArMe2SnCl compounds were evaluated against Staphylococcus aureus. | | |
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Syntheses of novel silylsubstituted distannanes (p 523-529) Roland Fischer, Thorsten Schollmeier, Markus Schürmann, Frank Uhlig Published Online: Mar 8 2005 5:04AM
DOI: 10.1002/aoc.854
| | | Bis(triorganosilyl)diorgano-stannanes or -distannanes can selectively be prepared by Wurtz-type coupling reactions. In addition, metallation of (R2R Si)2SnR 2 yields the respective monosilylated potassium stannides, from which the corresponding distannanes are readily obtained from oxidative coupling reactions. | | |
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Field-effect transistor based on organosoluble germanium nanoclusters (p 530-537) Akira Watanabe, Fusao Hojo, Takao Miwa Published Online: Mar 8 2005 5:04AM
DOI: 10.1002/aoc.857
| | | The field-effect transistor fabricated by a coating technique using organosoluble germanium nanoclusters shows amplification properties. | | |
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Reaction of phenyltrifluorosilane with 8-hydroxy- or 8-mercapto-quinoline and their derivatives as a route to new heterocyclic compounds of pentacoordinate silicon (p 538-541) Mikhail G. Voronkov, Olga M. Trofimova, Nikolai F. Chernov, Aleksandr I. Albanov, Nina N. Chipanina, Ekaterina A. Grebneva Published Online: Mar 8 2005 5:04AM
DOI: 10.1002/aoc.861
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Materials, Nanoscience and CatalysisFirst example of palladium-nanoparticle -catalyzed selective alcoholysis of polyhydrosiloxane: a new approach to macromolecular grafting (p 542-550) Bhanu P. S. Chauhan, Jitendra S. Rathore, Naim Glloxhani Published Online: Mar 8 2005 5:04AM
DOI: 10.1002/aoc.867
| | | A new synthetic route to cat alytically active, stable and isolable palladium nanocomposites is disclosed. The utility of such nanocomposites is demonstrated by the investigations of their activity as a recyclable catalyst for macromolecular grafting of polyhydrosiloxane. | | |
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Main Group Metal CompoundsSynthesis and photochemical reactions of 1,2,7-chalcogenadistannacycloheptanes (p 551-554) Masaichi Saito,aori Iso,atsuhiko Yamada, Susumu Nakano, Michikazu Yoshioka Published Online: Mar 8 2005 5:04AM
DOI: 10.1002/aoc.870
| | | 1,2,7-Chalcogenadistannacycloheptanes were synthesized by the reactions of 1,4-bis(bromostannyl) butane with appropriate chalcogenation reagents. Irradiation of the 1,2,7-thiadistannacycloheptane with a low-pressure mercury lamp (254 nm) gave 1,3,5,2,4,6-trithiatristannin. Irradiation of 1,3,5, 2,4,6-trithiatristannin with a low-pressure mercury lamp in the presence of either cyclotrisiloxane or 2,3-dimethyl-1,3-butadiene gave a complex mixture. | | |
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Structure and in vitro antibacterial activity of BuSnCl3-n[(OPPh2)(SPPh2)N]n (n = 1, 2) (p 555-562) Adina Rotar, Anca Silvestru, Cristian Silvestru, John E. Drake, Michael B. Hursthouse, Mark E. Light, Liana Bunaciu, Petre Bunaciu Published Online: Mar 8 2005 5:04AM
DOI: 10.1002/aoc.818
| | | BuSnCl2[(OPPh2)(SPPh2)N] (1) and BuSnCl[(OPPh2)(SPPh2)N]2 (2) have been prepared and their behaviour in solution and solid state was investigated by multinuclear (1H, 13C, 31P) NMR spectroscopy and single-crystal X-ray diffraction. Variable-temperature 31P NMR studies indicate the presence of various isomers for 2 in solution. The molecular structure in solid state features 5- and 6-coordinated metal atoms in 1 and 2, respectively, as a result of the monometallic biconnective behaviour of the monothioimidodiphosphinato moieties. Preliminary results on the in vitro antibacterial activity are reported. | | |
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Acid-dependent selective formation of trans-aryl(germyl)ethenes or 1-aryl-1-germylethenes by the protodestannylation of (Z)-germyl(stannyl)ethenes (p 563-569) Taichi Nakano, Yoshiya Senda,ayo Fukaya, Naoyuki Sugiuchi, Shinobu Ni-imi, Yutaka Takahashi, Hiroyukiurihara Published Online: Mar 8 2005 5:04AM
DOI: 10.1002/aoc.811
| | | Protodemetallation of (Z)-germyl(stannyl)ethenes gives trans-germylethenes or 1-aryl-1-germylethenes depending on the acid used. The reaction with HCl/TEACl (tetraethylammonium chloride) gives the former ethenes, while the use of HI/TBAI(tetrabutylammonium iodide) produces 1-aryl-1-germylethenes selectively. | | |
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Reactivities of germacyclopropabenzene toward some transition metal carbonyl complexes (p 570-577) Tomoyuki Tajima, Takayo Sasaki, Takahiro Sasamori, Nobuhiro Takeda, Norihiro Tokitoh Published Online: Mar 3 2005 5:29AM
DOI: 10.1002/aoc.810
| | | An overcrowded, diaryl-substituted germacyclopropabenzene underwent unique reactions with transition metal carbonyl complexes to give a variety of Ge-containing cyclic compounds, such as Fischer-type carbene complexes, a germacyclobutabenzene, and a germacyclobutanone, depending on theinds of reactants. | | |
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Triple-decker tin and lead cations (p 578-582) Alan H. Cowley, Jamie N. Jones, Charles L. B. Macdonald Published Online: Mar 8 2005 5:04AM
DOI: 10.1002/aoc.827
| | | Triple-decker tin and lead cations can be prepared by the addition of [( 5-C5Me5)M]+ cations (M = Sn, Pb) to the appropriate decamethylmetallocene. | | |
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