bluuebunny/crossref_metadata_2025_split huggingface dataset:
Rapid fixation of brains: a viable alternative?
Authors: Sharma M , Grieve J H K 
Published: March 2006

Aim:Recent events surrounding postmortem practices have necessitated several changes in the way necropsies are conducted both within the medicolegal and hospital settings. These changes have resulted in a striking reduction in the frequency of brain retention for neuropathological examination. Aberdeen Royal Infirmary, responding quickly to rising concerns among bereaved relatives regarding organ retention, instituted a change in practice regarding the examination of brains at necropsy as early as 2001. The new protocol involved subjecting the brain to rapid fixation using combined immersion and perfusion techniques. This allows return of the organ to the body without unreasonable delay to the funeral. In this article, we present the results of a retrospective audit comparing the efficacy of the new method against the conventional fixation protocol.Methods:An equal number of postmortem brains were selected randomly from the year 1998 (following the usual fixation protocol), and from the year 2001 (following the new method). A three tier scoring system was devised to assess section and staining quality, and a single observer scored all the cases.Results:No statistical difference was noted in the quality of sections prepared by rapid fixation those by conventional fixation. Furthermore, the rapid method was more frequently adequate for diagnosis (considering scores of 2 and 3 together) than the conventional method.Conclusion:Rapid fixation offers a viable alternative for detailed examination of brains at necropsy, without necessarily prolonging the retention of the organ.
A LOWER BOUND FOR THE NUMBER OF REIDEMEISTER MOVES FOR UNKNOTTING
Authors: HAYASHI CHUICHIRO 
Published: March 2006

How many Reidemeister moves do we need for unknotting a given diagram of the trivial knot? The absolute value of the writhe gives a lower bound of the number of Reidemeister I moves. That of a complexity of knot diagram "cowrithe" works for Reidemeister II, III moves. In Appendix A, we give an example of an infinite sequence of diagrams Dn of the trivial knot with an O(n) number of crossings such that the author expects the number of Reidemeister moves needed for unknotting it to be O(n2). However, writhe and cowrithe do not prove this.
An Anglican View of Methodist—Catholic Dialogue
Authors: Tanner Mary 
Published: March 2006

AbstractThis article is an appreciative evaluation of the forty years of Methodist – Roman Catholic dialogue from an Anglican perspective. It explores in particular three issues in the Methodist–Catholic international dialogue which are highly relevant for Anglican–Methodist and Anglican–Roman Catholic dialogue, namely, episcopacy and historic succession, the Petrine ministry, and authority. The suggestion is made that it may be timely to consider an Anglican–Methodist–Lutheran–Roman Catholic conversation of these three issues which are of great importance for the future shape of visible unity.
Kinetics of the Reaction between Titanium and Selenium Vapor at High Temperatures
Authors: Sasaki Yoshinori , Yamada Kenji 
Published: March 2006

Abstract
Metallic titanium was selenidized at temperatures of 550–700 °C in selenium vapor at 4.5 kPa. The reaction product was identified to be Ti1+xSe2 alone under all experimental conditions. Selenide growth rates were parabolic. A marker experiment indicated that the. reaction was controlled by inward diffusion of selenium through the selenide layer.
Crystal Structure of 2-Fluoroacetamidato-Bridged Mixed-Valent Octanuclear Platinum Blue with Average Platinum Oxidation State of 2.08, [Pt8(NH3)16(CH2FCONH)8](NO3)8.66·4H2O
Authors: Sakai Ken , Matsumoto Kazuko , Nishio Kyosuke 
Published: March 2006

Abstract
Red-purple plate crystals of [Pt8(NH3)16(CH2 FCONH)8](NO3)8.66·4H2O have been prepared and the crystal structure is reported. Magnetic susceptibility measurement revealed that the compound is mixture of [Pt(2.0+)8(NH3)16(CH2FCONH)8]8+ (Pt(2.0+)8) and [Pt(2.125+)8(NH3)16(CH2FCONH)8]9+ (Pt(2.125+)8), and the mixed ratio is Pt(2.125)8/Pt(2.0+)8 = 1.97.
Selective Kolbe Electrolytic Coupling Using Glasslike-Hard Carbon Anodes
Authors: Ohno Toshinobu , Fukumoto Tatsumi , Hirashima Tsuneaki , Nishiguchi Ikuzo 
Published: March 2006

Abstract
The use of some kinds of glasslike-hard carbons was found to lead to selective synthesis of the corresponding Kolbe coupled products in high yields comparable to the use of a Pt anode in anodic oxidation of some carboxylic acids.
Cobalt Schiff Base Complex Catalyzed Dehydrogenation of Amines with t-Butyl Hydroperoxide
Authors: Maruyama Kazushige , Kusukawa Takahiro , Higuchi Yoshihiko , Nishinaga Akira 
Published: March 2006

Abstract
Cobalt Schiff base complex catalyzed oxidation of secondary aromatic amines with t-butyl hydroperoxide resulted selectively in dehydrogenation to give the corresponding imines. Proposed mechanism involves electron transfer from the nitrogen atom in the substrate to t-butyloxyl or t-butylperoxyl radical produced in situ from a t-butylperoxocobalt(III) complex intermediate.
DNA Profiling. An Approach of Systemic Characterization, Classification, and Comparison of Genomic DNAs
Authors: Nishigaki Koichi , Amano Norihiko , Takasawa Tsutomu 
Published: March 2006

Abstract
A new method to obtain profiles of giant genome DNAs is described. It is based on two key techniques: Random PCR using oligonucleotides and temperature gradient gel electrophoresis. The experiments applied to the DNAs of 3 strains of E.coli demonstrated that this technique is informative and useful. The random PCR which uses various combinations of oligonucleotides as primers is effective to extract specific DNAs from a giant genome DNA.
Electrical and Optical Properties of Heat-treated Silicon Network Polymers
Authors: Watanabe Akira , Matsuda Minoru 
Published: March 2006

Abstract
Conductive thin film was prepared by the heat-treatment of poly(phenylsilane) which has a silicon-silicon network structure. The decrease of optical band-gap Eg,opt and the increase of spin concentration were observed with increasing heating temperature. The FT-IR spectra showed the formation of SiC structure at high temperature.
Remarkable Influence of Tacticity on Liquid Crystallinity of Polymethacrylates with Biphenyl Moiety as Mesogenic Group
Authors: Okamoto Yoshio , Asakura Toshikage , Hatada Koichi 
Published: March 2006

Abstract
Two methacrylates with a biphenyl moiety as a mesogenic group were anionically polymerized with t-butylmagnesium bromide in toluene, chloroform, and tetrahydrofuran at low temperature. Differential scanning calorimetric analysis of the highly isotactic and syndiotactic polymethacrylates obtained indicated that tacticity of the polymers greatly influences their liquid crystallinity.
Selectivity in the Consecutive SNAr-Dequaternization Reactions of Heteroaromatic Chlorides with Tertiary Amines under High Pressure
Authors: Matsumoto Kiyoshi , Toda Mitsuo , Hashimoto Shiro 
Published: March 2006

Abstract
Consecutive SNAr-dealkylation reactions of heteroaromatic chlorides such as 2-chloro-5-trifluoromethylpyridine and 2-chlorobenzothiazole with tertiary amines took place under high pressure in a highly selective fashion; some synthetic potential of the title reaction was exemplified.
Triple-Helix and Double-Helix Formations of Octamers of Deoxyriboadenylic and Deoxyribothymidylic Acids
Authors: Sugimoto Naoki , Shintani Yuki , Sasaki Muneo 
Published: March 2006

Abstract
Triple-helix and double-helix formations of octamers of deoxyriboadenylic and deoxyribothymidylic acids (dA8 and dT8) have been studied spectrophotometrically. The free-energy changes in 50 mmol dm−3 MgCl2 buffer at 25 °C were −21.2 kJ mol−1 for the triplex formation and −29.3 kJ mol−1 for the duplex formation, respectively. The other results by UV and CD spectroscopies were also reported.
Effect of Dangling Ends on the Double-Helix Melting of Ribooligonucleotides at Different Na+ Concentrations
Authors: Sugimoto Naoki , Hasegawa Keiko , Matsumura Akiko , Sasaki Muneo 
Published: March 2006

Abstract
We report quantitatively the effects of 3′ and 5′ dangling ends on the melting of the self-complementary double-helix of AUGCAU at various Na+ concentrations. The dependences of the melting temperature on the salt concentration are large for dangling G and U, but are small for the dangling A and C at both 3′ and 5′ ends.
Total Synthesis of Clavukerin A and Its Epimer
Authors: Asaoka Morio , Kosaka Takatoshi , Itahana Hirotsune , Takei Hisashi 
Published: March 2006

Abstract
Enantioselective synthesis of clavukerin A and its epimer was carried out. By the comparison of the spectral data and specific rotations of synthesized and natural ones, two trisnorsesquiterpens isolated from Clavulia and Cespitularia species are confirmed to be identical.
Selective CO2 Detection with a Lithium Conductor Based Sensor
Authors: Imanaka Nobuhito , Kawasato Takeshi , Adachi Gin-ya 
Published: March 2006

Abstract
Selective CO2 sensing was examined with CO2 sensor based on a lithium ionic conductor, LiTi2(PO4)3 + 0.2Li3PO4. The CO2 detectability was little influenced with NO2 coexistence in the atmosphere. The sensor could also detect the CO2 concentration selectively in the atmosphere where the SO2 content was smaller than approximately 20 ppm. In the case of CH4 coexistence, the total sum of the primary CO2 and CO2 formed from the CH4 oxidation, was obtained with the sensor.
Triethylborane Induced Radical Reaction of Ketene Silyl Acetals with Polyhalomethanes. Synthesis of 3,3-Dihalo- and 3-Haloacrylates
Authors: Sugimoto Jiro , Miura Katsukiyo , Oshima Koichiro , Utimoto Kiitiro 
Published: March 2006

Abstract
Treatment of ketene octyl t-butyldimethylsilyl acetal with tetrabromomethane or tribromomethane in the presence of a catalytic amount of triethylborane gave octyl 3,3-dibromoacrylate or octyl (E)-3-bromoacrylate, respectively.
Tetrakis(1,3-benzodithiol-2-ylidene)cyclopentyl Cations with Light Absorption in a Near Infrared
Authors: Sugimoto Toyonari , Enoki Tajio , Hosotani Yuka , Misaki Yohji , Yoshida Zen-ichi , Yamauchi Jun 
Published: March 2006

Abstract
The titled cations exhibited remarkably long wavelength absorptions reaching to a near infrared above 750 nm. The cause of this deep coloration has been clarified, which is ascribed to such a stabilization of electronically-excited biradicalic structures beyond expectation, as to participate in the ground states of the cations albeit in a very small amount (10−3–10−2%).
Cheletropic Reactions of Tricyclo[5.3.1.04,9]undeca-2,5-diene with Dichlorophosphines. Synthesis of Novel Phosphapolycycles
Authors: Toda Mitsuo , Miyahara Ikuko , Hirotsu Ken , Yamaguchi Ryohei , Kozima Shinpei , Matsumoto Kiyoshi 
Published: March 2006

Abstract
The cheletropic reaction of dichlorophosphines to tricyclo[5.3.1.04,9]undeca-2,5-diene, followed by hydrolysis with water gave 6-substituted-6-oxo-6-phosphapentacyclo[6.3.1.02,4.03,7.05,10]dodecanes whose structures were established by an X-ray crystallography.
Selective Catalytic Reduction of Aromatic Nitro Compounds Affording Amines under CO/H2O Conditions Using Amine-added Ruthenium–Carbonyl Complexes
Authors: Nomura Kotohiro 
Published: March 2006

Abstract
Remarkably high selectivities of nitro-group as well as high catalytic activities for the reduction of aromatic nitro compounds affording corresponding amines under CO/H2O conditions are exhibited by using amine(HNR2)-added Ru-carbonyl complexes; the reduction also proceeded without by-producing H2 which was formed by the Water-Gas Shift Reaction.
Synthesis and Photochemical Properties of Novel Spirobenzoselenazolinobenzopyrans
Authors: Hirano Masafumi , Miyashita Akira , Shitara Hiroaki , Nohira Hiroyuki 
Published: March 2006

Abstract
5-Methoxy-3-methyl-6′-nitrospirobenzoselenazolinobenzopyrans have been newly prepared and their reversible structure changes induced by light were characterized by spectroscopic studies. Their stable colored-forms were identified as 5-methoxy-3-methylbenzoselenazolenium-2-trans-(5′-nitrostyryl-2′-oxide) being the zwitterionic structure.
Photoreduction of Methyl Viologen with a Water-soluble Phthalocyaninatozinc(II) Complex in an Aqueous Solution
Authors: Kasuga Kuninobu , Hayashi Hiroki , Handa Makoto 
Published: March 2006

Abstract
Tetrakis(2-trimethylaminoethoxy)phthalocyaninatozinc(II) iodide catalyzed photoreduction of methyl viologen with visible light in the presence of triethanolamine in an aqueous solution. The effects of an ionic strength, pH, and polarity of solvents on the photoreaction were also investigated.
Preparation and Enzyme-based Structure Determination of 2A,6E-Bis(O-disulfonyl)-β-cyclodextrin
Authors: Fujita Kahee , Ishizu Takashi , Minamiura Noshi , Yamamoto Takehiko 
Published: March 2006

Abstract
2,6-di-O-Disulfonates were prepared by the reaction of 2-O-(mesitylsulfonyl)-β-cyclodextrin with mesitylsulfonyl chloride in pyridine. Each regioisomer was isolated and the 2A,6E-isomer was structurally determined through enzymatic hydrolysis by Taka amylase A and bacterial saccharifying amylase.
Structural Effects of Olefins in the Photooxygenation with Electron-Accepting Sensitizers. Kinetic Approach to Reactive Intermediates
Authors: Konuma Satoshi , Aihara Shin , Kuriyama Yasunao , Misawa Hiroaki , Akaba Ryoichi , Sakuragi Hirochika , Tokumaru Katsumi 
Published: March 2006

Abstract
Pulsed laser excitation studies on the reactive species in 9-cyanoanthracene(CNA)-sensitized oxygenation of 1,1-diphenyl-2-methylpropene (1a) and (E)-2,3-diphenyl-2-butene (1b) show that the reaction course is mostly governed by competitive quenching of the CNA excited singlet by 1 and oxygen to produce 1+• and 1O2, respectively. The results indicate that the reaction courses of tetraphenylethylene and 2,3-dimethyl-2-butene, for example, can be explained by exclusive quenching of sensitizer singlets by the olefin and oxygen, respectively.
Highly Enantioselective Synthesis of syn-α,β-Dihydroxy Thioesters by the Asymmetric Aldol Reaction Using a Chiral Tin(II) Lewis Acid
Authors: Mukaiyama Teruaki , Shiina Isamu , Kobayashi Shu 
Published: March 2006

Abstract
syn-α,β-Dihydroxy thioesters are prepared in good yields with high diastereo- and enantioselectivities by the asymmetric aldol reaction of 1-trimethylsiloxy-1-ethylthio-2-t-butyldimethylsiloxyethene with aldehydes using a chiral promoter consisting of tin(II) triflate, a chiral diamine and dibutyltin diacetate.
A Kinetic Study on the Copper-catalyzed Reaction of Silicon with Methanol into Trimethoxysilane
Authors: Suzuki Eiichi , Okamoto Masaki , Ono Yoshio 
Published: March 2006

Abstract
The reaction of methanol with silicon was carried out in a fixed-bed reactor at 463–533 K. In order to determine the kinetics of the reaction per reaction site on the silicon surface, a pressure- (or temperature-) transition method was employed. The reaction order with respect to methanol was 1.0 and 1.4 for the Si–CuCl mixture preheated at 513 and 723 K, respectively, indicating that the rate-determining step is not the diffusion of silicon or copper species to the reaction site, but the chemical process involving methanol. Kinetics also indicate that the nature of the reaction sites changes with the preheating conditions of the mixture.
Intramolecular Photochemistry of 3-Alkynyloxy-2-pyridones and Isomerization of the Photoadduct to Tricyclic β-Lactam
Authors: Somekawa Kenichi , Oda Hideshi , Shimo Tetsuro 
Published: March 2006

Abstract
Sensitized photoreaction of 3-(5-ethoxycarbonyl-4-pentynyloxy)-2-pyridone gave a [2+2]cycloadduct across 3,4-bond of the 2-pyridone. The adduct was thermally derived to a new tricyclic β-lactam.
Synthesis and Anionic Ring-Opening Polymerization of a Novel Aromatic Cyclic Carbonate Having Binaphthyl Structure
Authors: Takata Toshikazu , Matsuoka Hideo , Endo Takeshi 
Published: March 2006

Abstract
A novel aromatic cyclic carbonate (3) having binaphthyl structure was prepared by the reaction of 2,2′-binaphthol with 4-nitrophenyl chloroformate in the presence of a tert-amine. 3 polymerized very efficiently with potassium tert-butoxide at 20 °C to give corresponding linear polycarbonate with 12800 (/ 1.34) in 94% yield.
Novel Enzymatically Degradable Polymers Comprising α-Amino Acid, 1,2-Ethanediol, and Adipic Acid
Authors: Saotome Yasushi , Miyazawa Takeo , Endo Takeshi 
Published: March 2006

Abstract
Novel water-insoluble polymers, which are degraded and solubilized by the action of specific proteolytic enzymes, were successfully synthesized from α-amino acid, 1,2-ethanediol, and adipic acid.
Calix[4]arene-5,11,17,23-tetrasulfonate as an Analytical Reagent for Cerium(III) Ion
Authors: Yoshida Isao , Yamamoto Nobuhiro , Sagara Fumio , Ueno Keihei , Ishii Daido , Shinkai Seiji 
Published: March 2006

Abstract
Calix[4]arene-5,11,17,23-tetrasulfonate (1) reacts with cerium(III) ion in alkaline solution to form a colored complex (λmax = 417 nm, ε = 1.09 × 104 1 mol−1 cm−1). The max coloration reaction is specific for cerium among rare-earth elements. The coloration mechanism was discussed on the basis of the stability constants.
Electroless Metal Plating on Stearic Acid Layer Spread at Air/water Interface
Authors: Masuda Hideki , Zhang Jia-dan , Baba Nobuyoshi 
Published: March 2006

Abstract
A thin metal Ag film was obtained at an air/solution interface by using a spread stearic acid layer as a supporting substrate of electroless plating. The properties of the film and the condition of the electroless plating of Ag was examined with scanning electron microscopy and in situ reflectance spectroscopy.
Prediction of α-Helix Folding of Isolated C-Peptide of Ribonuclease A by Monte Carlo Simulated Annealing
Authors: Kawai Hikaru , Okamoto Yuko , Fukugita Masataka , Nakazawa Takashi , Kikuchi Takeshi 
Published: March 2006

Abstract
Conformation of the C-peptide fragment of RNase A is calculated by Monte Carlo simulated annealing. Starting from completely random initial conformations and minimizing the total potential energy without any bias, we obtained partial α-helix structure with a high probability (≈ 40%). The energetically most favourable structure exhibits a 2.5-turn α-helix. The results of simulation are consistent with the experimental implication for the role of charged residues for α-helix stability in this peptide.
Simple Preparation of the Optically Active γ-Hydroxy Vinylstannanes Using Lipase-Catalyzed Hydrolysis
Authors: Itoh Toshiyuki , Ohta Tadataka 
Published: March 2006

Abstract
An efficient optical resolution of γ-hydroxy vinylstannanes was achieved by the lipase-catalyzed enantioselective hydrolysis of the corresponding racemic acetates using lipase PS(Pseudomonas sp.).
Regioselectivity of Biomimetic Reduction of Tetrahydroxynaphthalene. Location of Transition Structures for Hydride Addition with Theoretical Calculations
Authors: Ichinose Koji , Sugimori Masamichi , Itai Akiko , Ebizuka Yutaka , Sankawa Ushio 
Published: March 2006

Abstract
The regioselectivity of a biomimetic reduction of 1,3,6,8-tetrahydroxynaphthalene (THN) was investigated by semi-empirical (AMI) molecular orbital calculations. Transition state structures and stabilities were simulated for the hydride attack models to the carbonyl carbons at C-1 and C-3 of the stable trianionic speices of THN. The results suggested that C-3 carbon was more favorable for the reduction, which agreed with the experimental fact.
Laser-induced Direct Synthesis of Butanediol and Acetaldehyde from Ethanol in the Presence of Hydrogen Peroxide
Authors: Shimizu Yuichi , Sugimoto Shun’ichi , Kawanishi Shunichi , Suzuki Nobutake 
Published: March 2006

Abstract
Butanediols and acetaldehyde were directly synthesized by KrF-laser irradiation of the N2-saturated ethanol (EtOH) containing H2O2.
Thermal C-H Activation Catalyzed by RhCl (CH2=CH2) (PMe3)2. Hydrogen Transfer from Cycloalkanes to Ethylene and Ethylene Insertion into Cycloalkanes
Authors: Sakakura Toshiyasu , Abe Fujio , Tanaka Masato 
Published: March 2006

Abstract
Dehydrogenation of cycloalkanes to cycloalkenes is catalyzed by RhCl(CH2=CH2) (PMe3)2 under ethylene pressure at a high temperature over 170 °C. Ethylene insertion into sp3 C–H bond of cycloalkanes occurs at 230 °C to afford ethylcycloalkanes.
A Recognition Model of tRNASer by Seryl-tRNA Synthetase in E. coli
Authors: Asahara Haruichi , Himeno Hyouta , Shimizu Mikio 
Published: March 2006

Abstract
E. coli seryl-tRNA synthetase (SerRS) is a dimeric enzyme, having a subunit composed of two domains, i.e., a globular domain that includes a putative active site, and a long antiparallel α-helical coiled coil domain. The recognition sites on tRNASer by SerRS were searched using the T7 transcription system, and a new model of the recognition mechanism was proposed, consisting of a long coil shaped domain on one subunit which interacts with the long extra arm of tRNASer, and a globular domain of the other subunit which interacts with the 3′ end of tRNASer.
Preparation and Ionic Conductivity of the Rapidly-Quenched Glasses in the System Li2O–TiO2–P2O5
Authors: Machida Nobuya , Fujii Kazuko , Minami Tsutomu 
Published: March 2006

Abstract
Li+ ion-conducting glasses were prepared in the system Li2O–TiO2–P2O5 by rapid quenching. These glasses had high ionic conductivities of 10−2–10−5 S m−1 at 400 K. The conductivities of these glasses increased and the activation energy for conduction decreased with an increase in the Li2O content of the glasses. At a given Li2O content, the conductivities at 400 K increased with substituting TiO2 for P2O5.
A Simple Method for the Preparation of Polyacrylamide Gel Filled Capillaries for High Performance Separation of Polynucleotides by Using Capillary Gel Electrophoresis
Authors: Baba Yoshinobu , Matsuura Toshiko , Wakamoto Kyoko , Tsuhako Mitsutomo 
Published: March 2006

Abstract
Polyacrylamide gel filled capillaries prepared by a simple method showed ultrahigh resolution of polynucleotides. Plate number of gel filled capillary was achieved to be 5 × 106 per meter for 55mer of polyadenylic acid. Mixture of 250 kinds of polyadenylic acids were baseline resolved and analyzed within 60 min.
Oxidation of Aldehydes into Carboxylic Acids with Molecular Oxygen Using Nickel(II) Complex Catalyst
Authors: Yamada Tohru , Rhode Oliver , Takai Toshihiro , Mukaiyama Teruaki 
Published: March 2006

Abstract
The oxidation of aldehydes into the corresponding carboxylic acids using a catalytic amount of nickel(II) complex under an oxygen atmosphere at room temperature is described. Bis[1,3-di(p-methoxyphenyl)-1,3-propanedionato]nickel(II)(Ni(dmp)2) behaves as an excellent catalyst for the oxidation of aldehydes to afford the corresponding carboxylic acids in good yields.
A Facile Synthesis of Cyanohydrin Trimethylsilyl Ethers by the Addition Reaction of Trimethylsilyl Cyanide with Aldehydes under Basic Condition
Authors: Kobayashi Shu , Tsuchiya Yoshikazu , Mukaiyama Teruaki 
Published: March 2006

Abstract
In the presence of a catalytic amount of Lewis base such as amine, phosphine, arsine or antimony, trimethylsilyl cyanide (TMS-CN) smoothly reacts with aldehydes to afford the corresponding cyanohydrin trimethylsilyl ethers in excellent yields.
The First Bicyclic System with σ(Si–Si)-π Conjugation. Synthesis of Bicyclo[6.6.0]-1,8-diisopropyl-4,4,5,5,11,11,12,12-octamethyl-1,4,5,8,11,12-hexasila-2,6,9,13-tetrayne
Authors: Iwahara Takahisa , West Robert 
Published: March 2006

Abstract
Treatment of 1,2-diisopropyltetrachlorodisilane with 2 equiv. of di-Grignard reagent of 1,2-diethynyltetramethyldisilane led to a good yield of the bicyclic title compound, which has a UV absorption at 260 nm.
Decamethyl-1,4,5,8,11,12-hexasilabicyclo[6.6.0]tetradeca-2,6,9,13-tetrayne
Authors: Sakamoto Kenkichi , Tsumura Manabu , Sakurai Hideki 
Published: March 2006

Abstract
Decamethyl-1,4,5,8,11,12-hexasilabicyclo[6.6.0]tetradeca -2,6,9,13-tetrayne was prepared by the reaction of a di-Grignard reagent derived from 1,2-bis(ethynyl)-1,1,2,2-tetramethyldisilane and 1,2-dimethyltetrachlorodisilane. Some physical and chemical properties of the novel bicyclic compound are described.