bluuebunny/crossref_metadata_2025_split huggingface dataset:
Optical Resolution of Chiral Ethylenebis(4,5,6,7-tetrahydro-1-indenyl)zirconium Derivatives by High-Performance Liquid Chromatography
Authors: Habaue Shigeki , Sakamoto Hiroshi , Okamoto Yoshio 
Published: March 2006

Abstract
Optical resolution of racemic C2-symmetric ethylenebis(4,5,6,7-tetrahydro-1-indenyl)zirconium derivatives was accomplished by high-performance liquid chromatography using cellulose tris(3,5-dimethylphenylcarbamate) as a chiral stationary phase.
Exploitation of Na+-Selective Electrodes for Protein Solutions from Crown-Bridged Calix[4]quinones
Authors: Yamamoto Hiromasa , Ueda Keiko , Suenaga Hikaru , Sakaki Toru , Shinkai Seiji 
Published: March 2006

Abstract
Crown-bridged calix[4]quinones (5 and 6) were synthesized from calix[4]crown (2). The ion-selective electrodes prepared from 5 or 6 still retained high selectivity for Na+ against K+ (&gt;103). For protein solution samples the electrode prepared from 2 showed a large phase divergence whereas those prepared from 5 or 6 were much more stable in protein solution. The difference is attributed to the less hydrophobic nature of 5 and 6 which strongly influences the protein adsorption onto the membrane surface.
A Monomeric Zinc Complex Ligated by an Unsymmetric Hydrotris(pyrazolyl)borate Containing an OH Group
Authors: Osawa Masahisa , Tanaka Masako , Fujisawa Kiyoshi , Kitajima Nobumasa , Moro-oka Yoshihiko 
Published: March 2006

Abstract
A novel zinc complex having an unsymmetric tris(pyrazolyl)borate, Zn(OAc)[HB(3-Me2C(OH)-5-iPrpz)(3,5-iPr2pz)2], was synthesized by the transmetalation of an oxygenated product formed a dimanganese(II, II) complex {Mn[HB(3,5-iPr2pz)3]}2(OH)2 with molecular oxygen.
Diffusionless Electrochemistry of Cytochrome b5 Adsorbed on a Multilayer Film Electrode
Authors: Glenn Julie D H , Bowden Edmond F 
Published: March 2006

Abstract
A multilayer film electrode has been developed that is well-suited for diffusionless electron transfer studies of acidic proteins. The multilayer electrode is comprised of trypsin-solubilized cytochrome b5 adsorbed electrostatically to a self-assembled HO2C(CH2)7SH/gold substrate via an intervening bridging layer of cationic poly-l-lysine.
Two-dimensional Molecular Patterning through Molecular Recognition
Authors: Oishi Yushi , Torii Yuzuru , Kuramori Miyuki , Suehiro Kazuaki , Ariga Katsuhiko , Taguchi Kazuhiro , Kamino Ayumi , Kunitake Toyoki 
Published: March 2006

Abstract
Molecular images for the mixed monolayers composed of guanidinium (G) and orotate (O) amphiphiles on pure water and on aqueous flavin adenine dinucleotide (FAD) solution were taken with an atomic force microscope (AFM). The AFM image of G/O mixed monolayer on FAD showed a periodic pattern composed of two kinds of peaks with different heights, whereas that on pure water showed a periodic peak. The molecular pattern is apparently induced by rearrangement of monolayer components based on specific recognition by FAD template molecule.
The Influence of the Chirality of Synthetic Iron Chelators Bearing N-Hydroxy-2(1H)-pyrazinones and Amino Acid Residues upon Iron Removal from Human Transferrin
Authors: Ohkanda Junko , Katoh Akira 
Published: March 2006

Abstract
New chiral iron chelators bearing N-hydroxy-2(1H)-pyrazinone, d-amino acid residues, and tris(2-aminoethyl)amine were synthesized, and their kinetic behavior of iron removal from human transferrin was investigated. The rate of iron removal by the chelator bearing d-alanine residue was suppressed to only one fourth that of l-alanine derivative.
Effects of Substituents on the Indoline Ring on the Negative Photochromic Properties of Spirobenzopyran Derivatives
Authors: Minami Masato , Taguchi Nobuyoshi 
Published: March 2006

Abstract
Novel substituted -6,8-dinitro-l′,3′,3′-trimethylspiro[2H-1-benzopyran-2,2′-indoline] derivatives have been synthesized in high yields, and their properties are investigated. The absorption maxima of the ring-open forms and the negative photochromic properties of spirobenzopyrans significantly depend on the substituents in the indoline ring and on the nature of the solvent used.
Crystal Structure of Dl-12-Hydroxystearic Acid
Authors: Kuwahara Tetsuro , Nagase Hiromasa , Endo Tomohiro , Ueda Haruhisa , Nakagaki Masayuki 
Published: March 2006

Abstract
12-Hydroxystearic acid was stacked to give a lamellar structure. 12-Hydroxy groups formed hydrogen bond sequences along the a-axis. The hydrocarbon chains took approximately an all-trans conformation, but might be slightly bent because of the 12-hydroxy group.
NMR Study of Pressure Effect on the Hindered Rotation in cis-1,12-Disubstituted[12]paracyclophanes
Authors: Yamada Hiroaki , Mukuno Kuniko , Umeda Mami , Maeda Takayasu , Sera Akira 
Published: March 2006

Abstract
Effect of hydrostatic pressure on the rate of internal rotation of title compounds has been examined by DNMR method. A quartz high–pressure NMR cell was used to realize the high–pressure experiment up to 300 MPa. The rate of internal rotation, lnk was found to increase linearly up to 300 MPa.
Crystal and Molecular Structure of 1,2-Dimethoxyethane Crystallized on a New Diffractometer
Authors: Yokoyama Yoshihiro , Uekusa Hidehiro , Ohashi Yuji 
Published: March 2006

Abstract
Crystal and molecular structure of 1,2-dimethoxyethane (DME) with low melting point (−58 °C) was investigated by crystallization on a new imaging plate-Weissenberg type diffractometer with a new low temperature equipment. The crystal belongs to the monoclinic system and the space group is C2/c. There are four molecules in a unit cell. The DME molecule lies on a two-fold axis and has a TGT conformation in the crystalline state.
Synthesis of Symmetric Oligo-DNA Dimers and Their Formation of Polymeric Supramolecular Assembly
Authors: Ohya Yuichi , Noro Hiroshi , Komatsu Mamoru , Ouchi Tatsuro 
Published: March 2006

Abstract
p-Hydroxybenzene was coupled with tetrathymidine or tetraadenosine through phosphodiester bonds to give symmetric oligo-DNA dimers, (T4)2Bz and (A4)2Bz, as components for a polymeric supramolecular assembly. The equivalent mixture of them formed a high-molecular-weight aggregate in aqueous media via complemental hydrogen bonds.
Ceric Ammonium Nitrate Mediated Cycloaddition of Hydroxyquinones with Alkenes for the One-Step Construction of Furoquinone Derivatives
Authors: Kobayashi Kazuhiro , Mori Masako , Uneda Tomokazu , Morikawa Osamu , Konishi Hisatoshi 
Published: March 2006

Abstract
A one-step formation of furoquinones, such as naphtho[2,3-b]furan-4,9-dione, naphtho[1,2-b]furan-4,5-dione, benzofuran-4,7-dione, and benzofuran-4,5-dione derivatives, by the ceric ammonium nitrate mediated [3+2] type cycloaddition of 2-hydroxy-1,4-naphthoquinones and 2-hydroxy-1,4-benzoquinones with alkenes or phenylacetylene is described.
Extractions of Ca@C60 and Sr@C60 with Aniline
Authors: Kubozono Yoshihiro , Noto Takako , Ohta Takayoshi , Maeda Hironobu , Kashino Setsuo , Emura Shuichi , Ukita Shigeyuki , Sogabe Toshiaki 
Published: March 2006

Abstract
Endohedral metallofullerenes, Ca@C60 and Sr@C60, prepared by the arc-heating of the graphite rods containing CaO and SrO, respectively, have been extracted with aniline under the air atmosphere. The laser desorption time-of-flight (LD-TOF) mass spectra for the extracted solutions exhibit intense peaks due to M@C60+ (M: Ca and Sr) and C60+ with weak peaks due to the other hallow fullerenes and metallofullerenes.
Temperature Dependence of Chiral Recognition in the Oxidation of Tris(ethylene-diamine)cobalt(II) Complex by Optically Active Anionic Cobalt(III) Complexes
Authors: Tatehata Akira , Muraida Akira 
Published: March 2006

Abstract
The temperature dependence of the stereoselectivity in the oxidation of tris(ethylenediamine)cobalt(II) complex by some chiral anionic cobalt(III) complexes has been studied over the temperature range of 5-45°C in aqueous solution. The activation enthalpy difference, ΔΔH‡, and the entropy difference, ΔΔS‡, between Δ-Λ and Δ-Δ pairs show two kinds of ΔΔH‡/ΔΔS‡ compensation behavior, indicating that the electron-transfer proceeds by two different types of reaction mechanisms. The relative importance of ΔΔH‡ and ΔΔS‡ is interpreted in terms of the difference in the stereoselective interactions upon formation of the precursor complex.
Synchronous Current Oscillations in Electrochemical Reduction Reactions on Two Platinum Electrodes in Sulfuric Acid Solution Containing Hydrogen Peroxide
Authors: Mukouyama Yoshiharu , Hommura Hayato , Matsuda Toshihiko , Yae Shinji , Nakato Yoshihiro 
Published: March 2006

Abstract
Synchronous oscillations are found for reduction currents on two independently potential–controlled Pt electrodes in 0.7 M H2O2–0.3 M H2SO4. It is shown that electrical interaction between the two oscillating electrochemical systems through the electrolyte solution is responsible for the synchronization.
Structure Disordering during Surface Pressure Relaxation of Langmuir Films of Stearic Acid as Studied by Infrared External Reflection Spectroscopy
Authors: Sakai Hiroshi , Umemura Junzo 
Published: March 2006

Abstract
In situ FT-IR external reflection spectra of Langmuir films of stearic acid on the water surface were recorded duing the surface pressure relaxation at two surface areas, corresponding to the liquid condensed (L2) and super-liquid (LS) phases. In the L2 phase, the surface pressure relaxation was minimal and so was the spectral change. In the LS phase, however, the structural change from the trans to gauche conformation was detected.
Complexation Kinetics of 5-Octyloxymethyl-8-quinolinol with Ni(II) at the Heptane-Water Interface
Authors: Shioya Takeshi , Tsukahara Satoshi , Teramae Norio 
Published: March 2006

Abstract
Complexation kinetics of 5-octyloxymethyl-8-quinolinol (Hocqn) with Ni(II) at the heptane-water interface was studied by measuring the dynamic interfacial tension. Decrease in the interfacial tension was caused by the adsorption of 1:1 complex formed at the interface. It was found that the complexation rate at the interface was 43 times faster than that in the bulk, and that the rate also depended on the counter-anion in the aqueous phase.
syn-trans Fused Bicyclic Ether Formation via Acetylene-biscobalthexacarbonyl Complex
Authors: Isobe Minoru , Hosokawa Seijiro , Kira Kazunobu 
Published: March 2006

Abstract
Medium size bicyclic ethers of 7-, 8-, and 9-membered rings were synthesized by connection between a hydroxy group on dihydropyranyl ring and a propargylic cation that was stabilized as an acetylene biscobalthexacarbonyl complex under acidic conditions. This cyclization selectively afforded the syn-trans bicyclic ring system often seen in marine toxins such as ciguatoxin.
Direct Observation of Solutes Trapping on a Surface-inert Reversed Phase Column
Authors: Tamura Atsushi , Khademizadeh Maasoomeh , Razee Saeid , Masujima Tsutomu 
Published: March 2006

Abstract
The solute trapping process onto the surface-inert reversed phase packing was dirctly investigated with chromato-videoscope. The Fluorescence intensity of separating dansyl (DNS) amino acids in the column was detected by video camera and densitogarm of solutes along the column length was obtained with computer-processing of the video images. Band widths of trapped DNS amino acids were narrow in the absence of BSA in sample solution. However, in the presence of BSA, band shapes turned broad according to increase of the concentration of BSA or injected volume of the sample.
An Asymmetric Synthesis of the BC Ring System of 8-Epitaxoids by Way of Intramolecular Aldol and Successive Stereoselective Methylation Reactions
Authors: Mukaiyama Teruaki , Shiina Isamu , Iwadare Hayato , Saitoh Masahiro , Nishimura Koji , Nishimura Toshihiro , Ohkawa Naoto , Sakoh Hiroki , Saitoh Katsuyuki 
Published: March 2006

Abstract
Optically active 1α-allyl-1β,11β-benzylidenedioxy-2α,10β-bis(benzyloxy)-7β,9β-isopropylidenedioxy-8α,12,12-trimethyl-4-methylenebicyclo[6.4.0]dodecane (2)1 which corresponds to BC ring system of 8-epitaxoids was prepared in high yield form ketoaldehyde 8 via intramolecular aldol cyclization and succesive stereoselective methylation reactions. The ketoaldehyde 8 was synthesized from 8-membered ring compound 3 by stereoselective Michael addition using higher-order cuprate.
Stereoselective Synthesis of ABC-Ring System of Hemibrevetoxin B
Authors: Matsukura Hiroko , Morimoto Masamichi , Nakata Tadashi 
Published: March 2006

Abstract
The 6, 6, 7-membered tricyclic ether ring system (ABC-ring) of hemibrevetoxin B was stereoselectively synthesized. The curcial steps in the present synthesis involve the ring expansion of tetrahydropyran to oxepane, 6-endo cyclization of epoxy alcohol, and insertion of a C-4 unit to the A-ring.
Crystal Structure of a Tris(dithiolene) Vanadium(IV) Complex Having Unprecedented D3h Symmetry
Authors: Kondo Mitsuru , Minakoshi Seika , Iwata Kazuko , Shimizu Toshio , Matsuzaka Hiroyuki , Kamigata Nobumasa , Kitagawa Susumu 
Published: March 2006

Abstract
The crystal structure of a tris(dithiolene)vanadium(IV) complex, [V(S2C2H2)3] (1), was determined. This complex shows the first instance of the nearly perfect D3h geometry in tris(dithiolene) vanadium(IV) complexes. In comparison with 1, the crystal structures of (NEt4)2[V(bdt)3] (bdt2− = 1,2-benzenedithiolate) (2) and (NEt4)2[V(tdt)3] (tdt2− = 3,4-toluenedithiolate) (3) having distorted Oh geometries were also determined by X-ray crystallography.
Solubilization of Meso-Carbon Materials by Butylation with Dibutylzinc and Butyl Iodide
Authors: Zhang Yan , Kidena Koh , Murata Satoru , Nomura Masakatsu , Yoneyama Yoshiharu , Kato Tsutomu 
Published: March 2006

Abstract
Solubilization of meso-carbon microbeads (MCMB) with dibutylzinc-butyl iodide reagents was investigated, this reaction giving tetrahydrofuran-soluble materials in 94-97% yeild. This is the first example, to our knowledge, for effective solubilization of these meso-carbon materials. The Mode of introduction of butyl groups was also clarified by using 13C-NMR of butylated samples.
Preparation of a Polymer with Limited π-Conjugation Length: A Polymer Containing Quaterthiophene Units
Authors: Sato Masa-aki , Hiroi Masao 
Published: March 2006

Abstract
A polymer containing quaterthiophene units in the main chain was prepared by electrochemical polymerization of 1,2-bis(3′-hexyl-2,2′-bithiophene-5-yl)ethane. The obtained green film had a conductivity of 2 × 10−2 S cm−1 in oxidized states and was neutralized by immersing in methanol. The cyclic voltammograms of the neutral film showed only an oxidation process in the first cycle.
A Facile Preparation and Polymerization of 1,1-Difunctionalized Disiloxanes
Authors: Mori Atsunori , Sato Hiroyoshi , Mizuno Katsuya , Hiyama Tamejiro , Shintani Koji , Kawakami Yusuke 
Published: March 2006

Abstract
Novel 1,1-difunctionalized disiloxanes are synthesized by the alkylative cleavage of cyclic siloxane using several alkyllithiums followed by quenching with chlorosilanes. The prepared difunctionalized siloxanes are subjected to polyaddition through platinum catalyzed hydrosilylation.
Thermal Study of a Silylmethylated Fullerene Leading to Preparation of Its Vacuum Deposited Thin Films
Authors: Nagashima Hideo , Kato Yoshiyuki , Satoh Hirohisa , Kamegashima Naoki , Itoh Kenji , Oi Kazuhiro , Saito Yahachi 
Published: March 2006

Abstract
Thermal study of a C60 derivative containing a siloxane structure revealed that it was unstable above 350 °C. A major decomposition pathway was formation of C60 and (Me3Si)2O presumably via homolysis of bonds between the α-carbon of the silyl group and the cage carbon. By careful control of the crucible temperature below 350 °C, amorphous vapor-deposited thin films on NaCl or mica were successfully prepared.
Decorative Coatings of Plating with Antibacterial Activity
Authors: Zhi-hong Zhao , Eguchi Seiichiro , Okada Yoshio , Osaka Tetsuya 
Published: March 2006

Abstract
Electroplated coatings of cobalt, zinc, copper and cobalt-containing alloys of nickel, zinc and chromium were found to have bactericidal action. The electroless plated coating of silver also hindered against proliferate of bacteria. Especially, they have bactericide properties to methicillin-resistant strains of Staphylococcus aureus (MRSA) in all. In addition, we discussed the relationship between rest potentials of various electroplated coatings and bactercidal action.
Molecular Structure of Inclusion Complex with Chloride Anion Eccentrically Bound into the Cavity of a Tetraazamacrotricyclic Receptor Having Asymmetrically Charged Nitrogen Centers
Authors: Hossain Md Alamgir , Ichikawa Kazuhiko 
Published: March 2006

Abstract
The crystal structure of [ClL]2+·2Cl−·3CH3OH, where L = (C6H5CH2)3N4((CH2)6)6, shows the complete encapsulation of a chloride anion into the intramolecular cavity of the macrotricyclic cage L3+. The included anion is held eccentrically into the cavity with a distance of about 4.1 Å from the three charged nitrogen cations and 5.7 Å from the uncharged nitrogen atom.
Synthesis, Structure, and Electrochemistry of a Dodecanuclear Chromium Cluster Complex [Cr12S16(PEt3)10]
Authors: Kamiguchi Satoshi , Imoto Hideo , Saito Taro 
Published: March 2006

Abstract
A dodecanuclear chromium sulfide cluster complex [Cr12S16(PEt3)10] has been synthesized by the reaction of a hexanuclear cluster complex [Cr6S8(PEt3)6] with sulfur. This complex has two octahedral Cr6S8 cores that are linked by two Cr-S bonds. The intercluster bonding mode is similar to that in the Chevrel phases. Cyclic voltammetry shows the existence of the intercluster electronic interaction between the two Cr6S8 cluster units.
Dynamic Photochemical Response of Ruthenium (II)/(III) Redox Chemical Waves in Belousov-Zhabotinsky Reaction
Authors: Akagi Toshimasa , Matsumura-Inoue Takeko 
Published: March 2006

Abstract
The dynamic photochemical response of Ru(bpy)32+-catalyzed Belousov-Zhabotinsky (B-Z) reaction was studied in a thin layer solution system with a mask. It was found that stable chemical waves are generated from a masked area and their features are dependent on the chemical components. A high [MA]0 greatly contributes to the photosensitivity of the system. (MA = CH2(COOH)2)
Electrochemical Behavior Hetero-Deposited Redox Polymer Langmuir-Blodgett Films with Ferrocene and Tris(bipyridine)ruthenium Derivatives
Authors: Aoki Atsushi , Miyashita Tokuji 
Published: March 2006

Abstract
Stable redox polymer monolayer and Langmuir-Blodgett (LB) films can be prepared from amphiphilic copolymers of N-dodecylacrylamide (DDA) with ferrocene derivative (Fc) and with ruthenium complex (Ru). Electrochemical properties of the LB films fabricated from the hetero-deposition of Ru and Fc copolymer monolayers onto ITO electrodes were investigated using cyclic voltammetry. The results demonstrate that the hetero-deposited redox polymer LB films show rectifying property and charge storage.
Enhancing Effect of Titanium(II) for the Oxidation of Methane with O2 by an EuCl3-Zn-CF3CO2H-Catalytic System at 40 °C
Authors: Yamanaka Ichiro , Soma Masanori , Otsuka Kiyoshi 
Published: March 2006

Abstract
Bis(2,4,-pentanedionate)TiO and TiO2 enhanced markedly the activity of the EuCl3-Zn0-CF3CO2H-catalytic system for the CH4 oxidation to MeOH with O2 at 40 °C. It is suggested that Ti(II) species generated from Ti(IV) by the reduction with Zn0 and CF3CO2H is responsible for this enhancement.
A Novel Preparation of Thiogallate-based Rare-earth Phosphors
Authors: Kobayashi Takeshi , Uheda Kyota , Naruke Haruo , Yamase Toshihiro 
Published: March 2006

Abstract
EuGa2S4 and CaGa2S4:Ce were prepared by a method of the decomposition of metal dimethyldithiocarbamates which provides a simple and safe technique desired for the phosphor production. UV-irradiation of such EuGa2S4 and CaGa2S4:Ce (in the Ce / Ca = 1 / 20 ratio) polycrystallines gave green and blue emission with high yield, as exemplified by relative yields of 0.17 and 0.84 against a commercially available Y2SiO5:Ce blue phosphor at room temperature respectively.
Synthesis and Characterization of a Binuclear Porphyrin Complex as a Model for Heme a3-CuB Site of Cytochrome c Oxidase
Authors: Fujii Hiroshi , Yoshimura Tetsuhiko , Kamada Hitoshi 
Published: March 2006

Abstract
A binuclear complex, 1, involving copper and heme complexes is synthesized and characterized by paramagnetic 1H-NMR, FAB mass, and ESR spectroscopies. These measurements indicate a fairly weak magnetic interaction between iron and copper ions when a bridege ligand is absent.
Electrocatalytic Hydrogenation of Acetylenes on Palladium Incorporating Poly [N-(5-Hydroxypentyl) Pyrrole] Film-Coated Electrode
Authors: Takano Nobuhiro , Kawakami Yutaka , Takeno Noboru 
Published: March 2006

Abstract
The catalytic polymer film electrode which was coated with poly[N-(5-hydroxypentyl) pyrrole] film on carbon materials and incorporated palladium metal microparticles in film was prepared. By use of the electrode the electrocatalytic hydrogenation of acetylenes in organic solvent-HCl buffer solution led to the efficient formation of ethanes in high current efficiencies.
Al3+-Exchanged Montmorillonite as an Effective Solid Catalyst for Selective Synthesis of Alkylphenols and Bisphenols
Authors: Tateiwa Jun-ichi , Hayama Ei , Nishimura Takahiro , Uemura Sakae 
Published: March 2006

Abstract
Al3+-Exchanged montmorillonite-catalyzed aromatic alkylation of phenol with aldehydes produces the corresponding bisphenols mainly or almost solely in good yields, while that with ketones affords selectively the corresponding alkylphenols in moderate to good yields, the alkylation always occurring at the carbonyl carbon.
Strong Magnetocrystalline Anisotropy in MnTPP-TCNE Charge Transfer Complex
Authors: Nagai Keiji , Iyoda Tomokazu , Fujishima Akira , Hashimoto Kazuhito 
Published: March 2006

Abstract
Magnetic properties of one-dimensional charge transfer complex between manganese meso-tetraphenylporphyrin (MnTPP) and tetracyanoethylene (TCNE) were investigated as its plate crystals. Strong magnetocrystalline anisotropy was observed in the field and the temperature dependences of magnetization. Magnetic phase transition was observed as 24 K and 27 K under 0.5 T of magnetic field along a- and b-axes, and c-axis, respectively. Either temperature was higher than that (18 K) of powder sample reported previously.
Mono-, Di-, and Trimetallic Palladium(II) Porphyrin Trimers with Etheno-bridges
Authors: Higuchi Hiroyuki , Takeuchi Makoto , Ojima Juro 
Published: March 2006

Abstract
Mono-, di-, and trimetallic Pd(II) complexes of the etheno-bridge porphyrin trimer 1 were prepared. It was found that the metalation of 1 first occurred in the inner porphyrin ring. The trimetallic Pd(II) trimer 6 exibited splitting of the Soret band and complete disappearance of the weak bands ranging from 600 to 1000 nm unlike the corresponding free-base and Ni(II) porphyrin trimers.
Reaction and Stereochemistry of C-Glycosidation in 2-Deoxy-4-Thioribofuranoside
Authors: Uenishi Jun’ichi , Sohma Atsushi , Yonemitsu Osamu 
Published: March 2006

Abstract
SnCl4 mediated C-glycosidation reactions of ethyl 2-deoxy-4-thioribofuranoside with silylated nucleophiles were described. α-Anomer was the major product formed in the reactions. The stereochemical course was found to be similar to that of ethyl 2-deoxyribofuranoside.
Two Kinds of Intermolecular π-π Interactions Controlling the Crystalline State Structure of 12,13,25,26-Tetraaza-2,15-dithia[3.3]phenanthrolinophane
Authors: Wang Zhen-He , Hirose Takuji , Hiratani Kazuhisa , Yang Yanyan , Kasuga Kazuyuki 
Published: March 2006

Abstract
The structural characterization of a dithiaphenanthrolinophane was performed. The stable structure in the crystalline state was found to be different from that in solution. The intermolecular face-to-face and edge-to-face π-π interactions of the aromatic rings play important roles in stabilization of the crystalline state conformation.