bluuebunny/crossref_metadata_2025_split huggingface dataset:
Fine‐needle aspiration of a pleomorphic lipoma of the head and neck: A case report
Authors: Yong Mona , Raza Anwar S. , Greaves Timothy S. , Cobb Camilla J. 
Published: January 2005

AbstractPleomorphic lipoma is a rare soft‐tissue tumor, most commonly seen in the head and neck regions of middle‐aged men. Fine‐needle aspiration (FNA) of these lesions can present a diagnostic challenge. Its large, hyperchromatic cells and multinucleated forms (floret cells) can easily be mistaken for a malignancy. A patient with a round, well‐circumscribed, painless, soft, subcutaneous posterior neck mass for 6 yr presented to our FNA clinic. Aspiration of the mass showed a hypocellular specimen with atypical large and floret cells with fragments of mature fibroadipose tissue in the background. Based on the clinical and cytomorphological findings, a diagnosis of pleomorphic lipoma was suggested, and it was confirmed on excision. This case highlights the need to be aware of unusual benign lesions that may arise in the head and neck region. Knowledge of these benign lesions will help in making the correct cytological diagnosis when these lesions are sampled by FNA. Diagn. Cytopathol. 2005;32:110–113. © 2005 Wiley‐Liss, Inc.
[Re6Q7O(3,5‐Me2PzH)6]Br2·3,5‐Me2PzH (Q = S, Se) − New Octahedral Rhenium Cluster Complexes with Organic Ligands: Original Synthetic Approach and Unexpected Ligand Exchange in the Cluster Core
Authors: Mironov Yuri V. , Shestopalov Michael A. , Brylev Konstantin A. , Yarovoi Spartak S. , Romanenko Galina V. , Fedorov Vladimir E. , Spies Hartmut , Pietzsch Hans‐Juergen , Stephan Holger , Geipel Gerhard , Bernhard Gert , Kraus Werner 
Published: January 2005

AbstractTwo new octahedral rhenium cluster complexes, [Re6S7O(3,5‐Me2PzH)6]Br2·3,5‐Me2PzH (1) and [Re6Se7O(3,5‐Me2PzH)6]Br2·3,5‐Me2PzH (2), with the organic ligand 3,5‐dimethylpyrazole (3,5‐Me2PzH), have been synthesised by reaction of rhenium chalcobromides Cs3[Re6(µ3‐Q7Br)Br6] (Q = S, Se) with molten dimethylpyrazole. During the reaction, all six apical bromine ligands of the cluster complexes are substituted by the organic ligand, which is coordinated through the aromatic nitrogen atom N2. Additionally, the inner ligand µ3‐Br in the cluster core [Re6(µ3‐Q7Br)]3+ is substituted by oxygen, giving cluster cores [Re6(µ3‐Q7O)]2+ with mixed chalcogen/oxygen ligands. Compounds 1 and 2 have been characterised by single‐crystal X‐ray diffraction analysis. They are isostructural and crystallise with four formula units in the unit cell. Absorption spectra and luminescence characteristics of these two cluster compounds have been investigated in methanol. Absorption starts below 400 nm. For both compounds, broad emissions were found. The fluorescence decays of the two compounds follow a diexponential decay behaviour. The main fluorescence intensity decays have longer fluorescence lifetimes of 3.07 ± 0.03 (1) and 3.96 ± 0.02 µs (2). Studying the thermal stability of both compounds in vacuo showed that the release of 3,5‐dimethylpyrazole ligands begins near 200 °C, and decomposition, with the removal of 7 molecules of 3,5‐Me2PzH, is complete at 330 °C. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)
Special meshes and domain decomposition methods for evolutionary convection–diffusion–reaction problems
Authors: Portero L. , Jorge J. C. 
Published: January 2005

AbstractIn this work we propose new parallel numerical methods to solve certain evolutionary singularly perturbed problems in a robust and efficient way. To get this, we firstly consider a semidiscretization in time using a simple fractional step Runge–Kutta method, where the splittings for the convection–diffusion–reaction operator and the source term are subordinated to a decomposition of the spatial domain in many smaller subdomains. Such semidiscretization procedure reduces the original problem to a set of elliptic problems (in smaller subdomains), which can be solved in parallel, and it avoids the use of Schwarz iterations. To discretize in space such problems we have considered classical linear finite elements on certain piecewise uniform meshes which have been constructed with a very simplea prioricriterion, similar to the one introduced by Shishkin for one‐dimensional stationary problems of this kind. We show that the use of these meshes permits to obtain uniformly convergent approximations even in the boundary layer regions. Copyright © 2005 John Wiley & Sons, Ltd.
Iterative solution techniques for unsteady flow computations using higher order time integration schemes
Authors: Bijl H. , Carpenter M. H. 
Published: January 2005

AbstractIn this paper iterative techniques for unsteady flow computations with implicit higher order time integration methods at large time steps are investigated. It is shown that with a minimal coding effort the standard non‐linear multigrid method can be combined with a Newton–Krylov method leading to speed‐ups in the order of 30%. Copyright © 2005 John Wiley & Sons, Ltd.
Tributylstibine‐mediated olefination of carbonyl compounds with bromomalonic ester and with dibromomalonic ester—A possible pathway through a stibonium ylide via halophilic initiation by tertiary stibines
Authors: Chen Chen , Huang Yao‐Zeng , Shen Yanchang , Liao Yi 
Published: January 2005

AbstractTributylstibine can mediate the olefination of carbonyl compounds with bromomalonic ester and with dibromomalonic ester. An initial halophilic attack of tributylstibine on the bromine of bromomalonic or dibromomalonic ester forming an ion pair of bromotributylstibonium cation and malonic (A) or bromomalonic ester carbanion (B), respectively, is proposed. These ion pairs react with carbonyl compounds to achieve subsequent olefination. Alternatively, 2 equiv of A collapse, with elimination of malonic ester, to form stiborane D, and the ion pair B reacts with another equivalent of tributylstibine to form stiborane D. This last undergoes a Wittig‐type reaction with carbonyl compound to achieve olefination.
Organoboranes. 52. The successful ring enlargement of boracyclanes via sequential one‐carbon homologation: The first synthesis of boracyclanes in the strained medium‐ring range
Authors: Brown Herbert C. , Phadke Avinash S. , Rangaishenvi Milind V. 
Published: January 2005

AbstractPrevious attempts to synthesize boracyclanes in the medium‐ring range (9‐, 10‐, 11‐, and 12‐ring members) via cyclic hydroboration of α,ω‐dienes have failed. However, their synthesis via the sequential one‐carbon homologation of B‐methoxyboracyclanes has been achieved utilizing the successive reaction of B‐methoxyboracyclanes with in situ generated (chloromethyl)lithium (LiCH2Cl): MeOB(CH2)5 → MeOB(CH2)6 → MeOB(CH2)7 → MeOB(CH2)8 → MeOB(CH2)9 → MeOB(CH2)10 → MeOB(CH2)11. The yields achieved are in the range of 75–85%. In each case the products are identified by conversion via the DCME reaction into the known cycloalkanones. This development provides the first entry into boracyclanes of the strained medium ring range.
α‐Alkenyl analogs of phosphorylcholines
Authors: Gololobov Yuri G. , Oganesyan Anush S. , Kolomnikova Galina D. , Kuznetsova Svetlana A. , Kasukhin Leonid F. 
Published: January 2005

AbstractThe new type of α‐alkenyl esters of phosphorus acids containing ammonium or phosphonium groups in unsaturated radicals as well as carbonyl or other complexes of Mo, Cr, W, Mn, or Pt with such organophosphorus ligands have been described. The alkenyl phosphates undergo dealkylation upon heating to give betaines. This conversion results in a substantial decrease of an anticholinesterase activity of the compounds and in a sharp rise of their hydrolytic stability. The prototropic rearrangement is observed for the phosphonium betaines.
Thermolysis of disubstituted 1,2‐dioxetanes: Activation parameters and chemiexcitation yields
Authors: Baumstark Alfons L. , Moghaddari Mehrdad , Chamblee Myra L. 
Published: January 2005

Abstracttrans‐3‐Methyl‐4‐(p‐anisyl)‐1,2‐dioxetane 1, trans‐3‐methyl‐4‐(o‐anisyl)‐1,2‐dioxetane 2, 3‐methyl‐3‐benzyl‐1,2‐dioxetane 3, and 3‐methyl‐3‐p‐methoxybenzyl‐1,2‐dioxetane 4 were synthesized in low yield by the β‐bromo hydroperoxide method. The activation parameters were determined by the chemiluminescence method (for 1 ΔG≠ = 22.8 ± 0.3 kcal/mol, Δ≠ = 22.2, ΔS≠ = −1.7 e.u., k60 = 7.6 × 10−3s−1; for 2 ΔG≠ + 23.6 ± 0.3 kcal/mol, ΔH≠ = 22.8, ΔS≠ = −2.2 e.u., k60 = 2.5 × 10−3S−1; for 3 ΔG≠ = 24.0 ± 0.4 kcal/mol, ΔH≠ = 23.1, ΔS≠ = −2.7 e.u., k60 = 1.2 × 10−3S−1; for 4 ΔG≠ = 24.0 ± 0.2 kcal/mol, ΔH≠, = 23.2, ΔS≠, = −2.4 e.u., k60 = 1.2 × 10−3s−1). Thermolysis of 1–4 produced excited carbonyl fragments (direct production of high yields of triplets relative to excited singlets) [chemiexcitation yields ϕT, ϕS, respectively: for 1 0.02, 0.0001; for 2 0.02, 0.0001; for 3 0.03, 0.0002; for 4 0.02, 0.0001]. The effect of paramethoxyaryl substitution was consistent with electronic effects. The ortho substitution in 2 resulted in an increase in stability of the dioxetane, opposite that observed for an electronic effect. The results are discussed in relation to a diradical‐like mechanism.
Evidence for formation of diphenylphosphinic peroxy radical intermediate: Spin trapping and chemical reactivity of the new phosphorus radical generated from diphenylphosphinic chloride and superoxide
Authors: Lim Sang Chul , Kim Yong Hae 
Published: January 2005

AbstractDiphenylphosphinic chloride reacts with the superoxide anion radical in acetonitrile under mild conditions to form a peroxyphosphorus radical intermediate which shows strong oxidizing abilities for the epoxidation of olefins, oxidation of sulfides to sulfoxides, desulfurization of thioamides to amides, and oxidation of triarylphosphines to phosphine oxides. The radical can be trapped using a spin trapping method.
The photochemical reaction of (E,E)‐dibenzylidenesuccinic thioanhydride: A spectroscopic and structural study
Authors: Davidse P. Adriaan , Dillen Jan L. M. 
Published: January 2005

AbstractThe first photochromic thioanhydride, (E,E)‐2,3‐dibenzylidenesuccinic thioanhydride (1b), was synthesized. Irradiation of (1b) in benzene, dichloromethane, or chloroform gives isomerization and cyclization products similar to those obtained for the anhydride analogue (1a). The crystal structure of (1b) was determined (X‐rays) and compared to the structures of the anhydridge (1a) and N‐phenylimide (1c). 1H and 13C NMR spectra were recorded, and the electron charge densities of the carbon atoms were calculated with AM1. These results are discussed and compared with those for the compounds 1a–1c. The thioanhydride (1b) ring is much more twisted than either the anhydridge (1a) or the imide (1c) rings. The linear relationship between the 13C NMR chemical shifts and the electron charge density on the given atom has been investigated. The C(carbonyl) and C(α) carbon atoms of 1b were found to be greatly deshielded relative to the corresponding atoms in 1a and 1b. The increase in corresponding atoms in 1a and 1b. The increase in sensitivity toward cyclization of the thioanhydridge (1b) is attributed to the marked change in the charge distribution.Crystal data. Thioanhydride (1b): space group P21/c with a = 12.956(3) Å, b = 14.843(6) Å, c = 7.512(6) Å, β = 98.05(2)°, Rw = 0.085 and R = 0.089.
Charge transfer complexes of some N‐methylated thiohydantoins with molecular iodine
Authors: Cristiani Franco , Devillanova Francesco A. , Diaz Angelo , Isaia Francesco , Verani Gaetano 
Published: January 2005

AbstractUsing a series of N‐methylated thiohydantoins as substrates, the donor properties of the sulfur atom are measured by determining the stability constants (K) of their adducts with molecular iodine. The K's have been determined by recording the UV‐visible spectra of several CH2Cl2 solutions with different amounts of the reagents. The experimental data fit the 1:1 adduct model for all the compounds. The K values, compared with those previously found for the unsubstituted hydantoins and with those obtained for 5‐methyl‐2‐thiohydantoin, show that the hydrogen‐bonding interaction between the NH hydrogen and the S‐bonded iodine plays an important role in determining the stability of the adduct.The K values obtained for several pentaatomic rings, all containing the thioureido group HNC()NH, are discussed on the basis of the influence of the substituents at C‐4 and C‐5 on the donor properties of the sulfur atom.
Conformational analysis of 1,4,7‐trithiacyclodecane and related compounds: Synthesis and complexation studies of mesocyclic and macrocyclic polythioethers VI
Authors: Setzer William N. , Guo Qin , Meehan Edward J. , Grant Gregory J. 
Published: January 2005

AbstractMolecular mechanics (MM2) calculations have been carried out on the ten‐membered ring trithioethers, 1,4,7‐trithiacyclodecane (10S3) and 1,4,7‐trithiacyclodecan‐9‐one (keto‐10S3). The lowest energy conformations according to these calculations are a [1333] and a [2233] conformation, respectively. The crystal and molecular structure of the ketone, 1,4,7‐trithiacyclodecan‐9‐one, has been determined by a single‐crystal X‐ray study. The compound crystallizes in the monoclinic space group P21, with two molecules per unit cell of dimensions a = 7.176(1) Å, b = 5.3447(6) Å, c = 12.0914(6) Å, and β = 96.486(7)0, and R = 0.048. The conformation adopted by the compound in the crystalline state is a [2323] or boat‐chair‐boat conformation with two sulfur atoms endodentate and one sulfur atom exodentate.
Synthesis and X‐ray crystal structure analysis of (−)‐1‐menthoxygermatrane
Authors: Zaitseva G. S. , Mohammed Nasim , Livantsova L. I. , Tafeenko V. A. , Aslanov L. A. , Petrosyan V. S. 
Published: January 2005

AbstractA solvate complex of (−)‐1‐menthoxygermatrane with chloroform (1) was obtained by reaction of (−)‐menthoxytriethylstannane with 1‐bromogermatrane in chloroform. The crystal and molecular structure of 1 was established by X‐ray analysis.
Toward molecular wire: Synthesis, crystal, molecular, and π‐electronic structure of 1,7‐bis(aryl)‐1,3,5,7‐tetraaza‐2,4,6‐trithia‐1,2,5,6‐heptatetraenes
Authors: Zibarev Andrey V. , Miller Alexey O. , Gatilov Yuri V. , Furin Georgii G. 
Published: January 2005

AbstractThe title compounds were obtained by the reaction of 1‐aryl‐3‐trimethylsilyl‐1,3‐diaza‐2‐thiaallenes with dichloromonosulfane or 1‐aryl‐4‐(1‐phtalimidyl)‐1,3‐diaza‐2,4‐dithia‐1,2‐butadienes in the presence of CsF. The latter route also afforded nonsymmetric derivatives. In contrast, the reaction of N,N,N′,N′‐tetrakis(trimethylsilyl)diaminosulfane with S,S‐dichloro‐N‐aryliminosulfuranes (1:2) led to 1,3‐bis(aryl)‐1,3‐diaza‐2‐thiaallenes and cyclotetra(azathiene). As shown by the X‐ray structure analysis, the molecule of the title compound with Ar = Ph is planar, with configuration of the azathiene chain being similar to that of poly(azathiene) (SN)x. The MNDO calculations indicate that most of the π‐MOs of this compound, including the frontier ones, are delocalized throughout the whole molecule. The data obtained confirm the possibility of creating molecular wire for molecular electronic devices on the basis of extended acyclic azathienes. An attempt to synthesize more extended compounds than the title ones resulted in spontaneous shortening of their azathiene chains.
The reaction of decaborane with hydrazoic acid: A novel access to azaboranes
Authors: Müller J. , Paetzold P. , Boese R. 
Published: January 2005

AbstractThe reaction of B10H12(SMe2)2 (1) with HN3 yields arachno‐B10H12(N3)(NH2) (2), a product with a μ‐NH2 group. Compound 2 can be hydrolysed to give the known arachno‐B9H13(NH3) (3). nido‐NB9H11(N3) (4) is formed from 2 by a deprotonation/protonation sequence. The azaborane nido‐NB10H13 (5) is a product of the thermolysis of 2. The structures of 2–5 are elucidated by 2‐D COSY 11B–11B NMR spectra; the structure of 2 is also elucidated by an X‐ray structure analysis.
Synthesis and characterization of (Me3Si)2AsCH2RCH2As(SiMe3)2 (R = CH2, SiME2) and
Authors: Holley W. K. , Pasterczyk J. W. , Pitt C. G. , Wells R. L. 
Published: January 2005

AbstractThe synthesis and characterization of (Me3Si)2AsCH2RCH2As(SiMe3)2 [R = CH2 (1), SiMe2 (2)] is described. Compound 1 reacts with four equivalents of Ph2GaCl to produce (3), whose structure was deduced by use of 1H and 13C{1H} NMR spectroscopy.
Samarium (II) diiodide‐induced reductive cleavage of SeSe and TeTe bond in diphenyl diselenide and ditelluride leading to a samarium phenylselenolate and tellurolate: Preparation of unsymmetrical alkylphenyl selenides and tellurides
Authors: Fukuzawa Shin‐Ichi , Niimoto Yasuhiko , Fujinami Tatsuo , Sakai Shizuyoshi 
Published: January 2005

AbstractDiphenyl diselenide and diphenyl ditelluride were reduced by samarium (II) diiodide in tetrahydrofuran‐hexamethylphosphoric triamide to produce samarium phenylselenolate and samarium phenyltellurolate, respectively. This new selenolate or tellurolate anion species reacted smoothly with alkyl, allyl, and benzyl halides to give alkyl‐, allyl‐, and benzylphenyl selenides or tellurides in good yields under mild and neutral conditions. The samarium selenolate reacted with α‐halo ketones to give the corresponding α‐phenylseleno ketones. 1,4‐Addition with α,β‐enones proceeded to give 3‐phenylseleno ketones in moderate yields. Isolation of phenylselenotributyltin or phenylseleno‐trimethylsilane by transmetalation with tributyltin iodide or trimethylchlorosilane, respectively, suggested the presence of the samarium selenolate species.
Reactivity in molecular crystals: Radical formation in chiral phosphorus compounds
Authors: Aagaard Olav M. , Janssen René A. J. , de Waal Bas F. M. , Buck Henk M. 
Published: January 2005

AbstractMolecular mechanics calculations, using the AMBER program (version 3.0), are presented on the radiogenic electron‐capture radical formation in the crystalline chiral organophosphorus compounds (2R,4S,5R) and (2S,4S,5R) 2‐chloro‐3,4‐dimethyl‐5‐phenylphospholidine 2‐sulfide (respectively 1 and 2). Geometry optimization of the corresponding radical anion structures and their respective crystal surroundings reveals an increase of the Van der Waals interactions, which is significantly larger in compound 2 than in 1. This is in good agreement with previous single‐crystal ESR experiments and molecular interactions calculations without geometry optimization [1].
A novel synthesis of α,β‐unsaturated phosphonates
Authors: SkowrońNska Aleksandra , Dybowski Piotr 
Published: January 2005

AbstractA stereoselective synthesis of α,β‐unsaturated phosphonates based on the reaction of S‐(β‐oxoalkyl)‐dithiophosphates and Se‐(β‐oxoalkyl)selenophosphates with sodium dialkyl phosphites is described.
The extension of the mechanistic concept of the nucleophilic catalysis in the silicon chemistry to some reactions of the P(III) center: Analogies between silylation and phosphorylation
Authors: Chojnowski Julian , Cypryk Marek , Fortuniak Witold 
Published: January 2005

AbstractMany observations prove that a number of silylation reactions of a trialkylsilyl halide‐uncharged base system occur with the transient formation of a 1:1 tetrahedral silicon ionic complex of the silyl halide with the base. Some catalytic processes of phosphorylation of protonic substrates with tricoordinate phosphorus halides in mixture with an uncharged base show similar features to these silylation reactions, implying that a similar mechanism may operate. It was demonstrated that Ph2PCl phosphorylates t‐BuOH faster under catalysis with 4‐N,N‐dimethylamino pyridine or N‐methylimidazole than in the presence of Et3N by a factor of 400 and 33, respectively. The catalytic phosphorylation process exhibits a very low activation energy and a high negative value of entropy of activation. The interaction of the uncharged bases with model tricoordinate phosphorus halides was demonstrated to lead to the formation of ionic 1:1 complexes without changing the coordination number of phosphorus, in full analogy to the silyl halide complex formation. Finally, the interaction of phosphorous tris(dimethylamide) with a silyl iodide and a phosphorous iodide results in both cases in the formation of the ionic 1:1 complex, which also leads to analogous reactions of exchange of the amide group with iodide. These close similarities imply that some phosphorylation reactions with tricoordinate phosphorus halides catalyzed with uncharged bases occur via a tricoordinate phosphorus cation intermediate.
Two new syntheses of the “phospha‐wittig” reagents
Authors: Bauer Siegfried , Marinetti Angela , Mathey François 
Published: January 2005

AbstractThe secondary phosphorylphosphane complexes used in the synthesis of phosphaalkene complexes from carbonyl compounds by the so‐called „phospha‐Wittig”︁ reaction can be obtained by two routes. In the first one, a primary lithiophosphine complex is condensed with a chlorophosphite. The resulting PP compound is oxidized at the free phosphorus by 3‐chloroperbenzoic acid. In the second one, bis(phosphoryl)phosphane complexes are allowed to react with sodium methylate in methanol or with water. One of the two PP bonds of the starting produt is thus cleaved to give the „phospha‐Wittig”︁ reagent. Both routes give better yields and are less sensitive to steric hindrance than the previously described method.
Synthesis of benzo‐1,3‐ditellurole and its precursors
Authors: Sadekov I. D. , Rivkin B. B. , Gadjieva P. I. , Minkin V. I. 
Published: January 2005

AbstractPoly(o‐phenyleneditelluride) 6 has been prepared by the reduction of 1,2‐bis(trichlorotelluro)benzene obtained by treatment of 1,2‐bis(trimethylsilyl)benzene with TeCl2. The reduction of 6 with NaBH4 in ethanol solution affords sodium benzene‐1,2‐ditellurolate, which, upon treatment with methylene bromide, forms benzo‐1,3‐ditellurole in 40–47% yield. Benzo‐1, 3‐ditellurole has also been synthesized in 18–20% yeild by the reaction of 1,2‐bis(trimethylslyl)benzene with bis(trichlorotelluro)methane, with subsequent reduction of the product, 1,1,3,3‐tetrachlorobenzo‐1,3‐ditellurole.
Bimanes 28: Extraction of sulfur from fluorescent models for biological thiols
Authors: Radkowsky Annette E. , Marciano Daniele , Shalev Deborah E. , Kosower Nechama S. , Zipser Judith , Kosower Edward M. 
Published: January 2005

AbstractSulfur extraction from the tripeptide thiol, glutathione (α‐glu‐cys‐gly) (1) via reaction with syn‐(1‐bromo‐ethyl, methyl)bimane (2) yields glutathione slfide and the thiabridged bimane, μ(S)‐syn‐(methylmethylene, methyl)bimane (3) [1]. The reaction with 2 has been extended to dithiols as models for important biological thiols such as reduced trypanothione. The fluorescent dithiols were derived through reductive cleavage with triphenylphosphine (tetrahydrofuan, Hcl−Kbr solution, pH 1.5) of the dithiatriclic bimane esters, μ(O2C(CH2)SS(CH2)nCO2)‐syn‐(CH2,CH3)B, n = 1, 2, 3, prepared from syn‐(bromomethyl, methyl)bimane (4) and the corresponding dithiadicarboxylic acids. Sulfur extraction led to 3 and the cyclic sulfide derived from the dithiol in moderate yields. The dithiols, dithiothreitol and dithioerythritol, also yielded moderate amounts of 3. Sterically hindered thiols (e.g., those in hemoglobin) gave 3 in lower yields. Treatment of human red blood cells and red cells membranes (hemoglobin‐free ghosts) with 2 gave rise to some 3. A side product in some reactions was the oxabridged bimane, μ(O)‐syn‐(methylmethylene, methyl)bimane.
Synthesis, characterization, and solution properties of new heterocyclic tellurium compounds based on 5,6‐dimethyl‐1,3‐dihydro‐2‐telluraindene
Authors: Al‐Rubaie Ali Z. , Al‐Masoudi Eman A. 
Published: January 2005

AbstractThe synthesis and characterization of a new range of heterocyclic tellurium compounds based on 5,6‐dimethyl‐1,3‐dihydro‐2‐telluraindene are reported. Conductivity measurements of most compounds in dimethylsulfoxide (DMSO) and N,N‐dimethylformamide (DMF) showed considerable ionic character in both solvents. 1H and 13C NMR studies indicated that the telluronium salts are stable to reductive elimination and no reaction between solute and solvent was observed. Benzyl and allyl telluronium salts are exceptional. Infrared and mass spectral data are reported and discussed.