bluuebunny/crossref_metadata_2025_split huggingface dataset:
Phenylmercury Dithio Complexes as Ligands: Preparation and Spectroscopic Characterization of Heterobimetallic Complexes Obtained from Bisdithio Complexes of Ni(II), Pd(II), and Pt(II) as Lewis Acids
Authors: Singh Nanhai , Singh Nand Kishore , Kaw Chetna 
Published: July 2006

Abstract
Reaction of PhHgX [X=ethylxanthate (xant) or N,N′-diethyldithiocarbamate (dtc)] with MX2 [M=Ni(II), Pd(II) or Pt(II)] occurs, to afford a new class of golden green to yellowish brown organo heterobimetallic complexes, PhHgXMX2 with MS4 coordination geometry. The precursor PhHgX, have also been characterized. All the complexes are quite stable in solid and solution and are non-conducting species. In PhHgX, IR and NMR spectral studies suggest that dithio ligands are bound to phenylmercury in a linear fashion with additional Hg···S linkage in monodentate manner. Diamagnetism and electronic spectra indicate square planar geometry around M(II) in all the heterobimetallic complexes. IR and NMR spectral studies suggest the presence of monodentate and symmetrical bidentate dithio groups in heterobimetallic complexes.
ESR Studies of the Adsorption Behavior of Polystyrene at the Solid–Liquid Interface
Authors: Kobayashi Kazutoshi , Yajima Hirofumi , Imamura Yoshio , Endo Ryuichi 
Published: July 2006

Abstract
The adsorption of spin-labeled polystyrene on the silica surface from a carbon tetrachloride solution was studied by ESR spectroscopy. The fraction of train segments in the adsorbed polymer was determined from ESR spectrum analysis. The adsorption behavior of polystyrene is discussed as a function of surface coverage.
ESR Spectra of Radical Ions Generated from 5,10-Dihydroindeno[2,1-α]indene
Authors: Ogawa Keiichiro , Suzuki Hiroshi , Higuchi Jiro , Tajima Kunihiko , Ishizu Kazuhiko 
Published: July 2006

Abstract
While each the ESR hyperfine coupling constants (hfc’s) for the aromatic protons of the anion radical derived from 5,10-dihydroindeno[2,1-a]indene (2−·) is similar to that of the corresponding protons of the cation radical of the same compound (2+·) as well as of the radical ions of (E)-stilbene (1−· and 1+·), the methylene protons of 2−· shows an unusually large hfc value, which is much larger than that of 2+·. This is interpreted in terms of the so-called “Whiffen Effect.”
The Crystal and Molecular Structure of cis-Dichloro[3,11-dimethyl-3,11,17,18-tetraazatricyclo[11.3.1.15,9]octadeca-1(17),5,7,9(18),13,15-hexaene]rhodium(III) Cation
Authors: Sakaba Hiroyuki , Kabuto Chizuko , Horino Hiroshi , Arai Mannosuke 
Published: July 2006

Abstract
The crystal and molecular structure of the title compound has been determined by the use of the X-ray diffraction method. The central metal atom coordinates all four of the nitrogen atoms of N,N′-dimethyl 2,11-diaza[3.3](2,6)-pyridinophane and two additional chloride atoms in an approximately octahedral geometry.
Synthesis of Substituted Azaindenes: Synthesis of New Pyrazolo[1,5-a]pyrimidine Derivatives
Authors: Elnagdi Mohamed Hilmy , Erian Ayman Wahba 
Published: July 2006

Abstract
Several new pyrazolo[1,5-a]pyrimidines were synthesized via the reaction of 4,5-disubstituted 3-aminopyrazoles 1a–d with 3-dimethylaminopropiophenone, cinnamaldehyde, benzylideneacetophenone and tetracyanoethylene.
Charge-Carrier Drift Mobilities and Phase Transition in Tetrakis(octylthio)tetrathiafulvalene, TTC8–TTF, Crystal
Authors: Li Yongfang , Nakano Chikako , Imaeda Kenji , Inokuchi Hiroo , Maruyama Yusei , Iwasawa Naoko , Saito Gunzi 
Published: July 2006

Abstract
Temperature dependence of the charge-carrier mobility in tetrakis(octylthio)tetrathiafulvalene crystals has been observed in the temperature range of −100–45°C by the time-of-flight measurement of transient photocarriers. The mobility shows a clear jump at the crystal phase transition which is found in the electrical conductivity measurement. This fact may lead a quantitative analysis of the correlation between the conductivity jump and the phase transition.
Stereoselective Syntheses of α-Substituted Cyclic Ethers and syn-1,3-Diols
Authors: Homma Koichi , Takenoshita Haruhiro , Mukaiyama Teruaki 
Published: July 2006

Abstract
In the presence of a catalytic amount of triphenylmethylium hexachloroantimonate or a catalyst system of antimony pentachloride, chlorotrimethylsilane and tin(II) iodide, α-substituted cyclic ethers are stereoselectively prepared from lactones by successive treatment with 1-(t-butyldimethylsiloxy)-1-ethoxyethene and silyl nucleophiles such as triethylsilane, allyltrimethylsilane and trimethylsilyl cyanide. These catalysts also promote the reaction of γ-, δ-, and ε-trimethylsiloxy carbonyl compounds with silyl nucleophiles resulting in the formation of α-substituted cyclic ethers. The former procedure is effectively applied to short syntheses of (−)-cis-rose oxide and (cis-6-methyltetrahydro-2-pyranyl)acetic acid, a constitutent of civet. Furthermore, syn-1,3-diols are also stereoselectively prepared from lactone analogue, 6-cis-substituted 2-trichloromethyl-1,3-dioxan-4-ones, easily prepared from β-hydroxy carboxylic acids.
Syntheses and Properties of Oligothymidylate Analogs Containing Stereoregulated Phosphoromorpholidate and Phosphodiester Linkages in an Alternating Manner
Authors: Ozaki Hiroaki , Kitamura Masanori , Yamana Kazushige , Murakami Akira , Shimidzu Takeo 
Published: July 2006

Abstract
Syntheses and some properties of undecathymidylate analogs containing stereoregulated phosphoromorpholidate and phosphodiester linkages in an alternating manner are described. These analogs were easily obtained by the phosphorobisamidite approach starting from pre-separated diastereomerically pure dithymidine phosphoromorpholidate derivatives. Both isomers were found to be high resistant to nucleases, in comparison with natural oligothymidylate; the phosphodiester linkages except 3’-end in the isomers were not cleaved by SI nuclease and both isomers were very slowly degraded by phosphodiesterase I and micrococcal nuclease. The rate of each degradation was dependent on the configuration of phosphoromorpholidate linkage in each isomer. The UV and CD spectral studies show that one of the isomer can interact with poly(dA) to give B-type duplex possessing the same thermal stability as natural oligothymidylate-poly(dA) duplex and the other isomer does not interact with poly(dA) under the comparable conditions.
Proton-Transferred Ion Pairs of p-Hydroxybenzaldehyde and p-Hydroxyacetophenone in Ethers at Low Temperature
Authors: Inoue Hiroyasu , Sakurai Tadamitsu , Hoshi Toshihiko , Okubo Jun 
Published: July 2006

Abstract
The self-associations of p-hydroxybenzaldehyde (HBA) and p-hydroxyacetophenone (HAP) have been studied from measurements of phosphorescence and the excitation spectra at 77 K. At appropriately high concentrations of HBA and HAP in ethereal matrices, such as 1,4-dioxane, these compounds exhibit dual phosphorescences around 430 and 470 nm with excitation at 290 and 330 nm, respectively. The shorter-wavelength emission is due to monomeric species of the substrates. The longer-wavelength emission can be interpreted as being due to ion pairs, in which the proton of the hydroxyl group of the substrate molecule is transferred intermolecularly to the formyl group of another substrate molecule. The phosphorescence excitation spectra show that the ion pairs are formed in the ground states of the phenolic compounds, being in equilibrium with the monomeric species at 77 K. The ion pair formation is strongly dependent on the medium.
Thienylpyridines as a New Fluorescent Reagent. I. Determination of Primary Alkylamines with 5-(4-Pyridyl)-2-thiophenecarbaldehyde Using HPLC
Authors: Nakajima Riichiro , Yamamoto Akifumi , Hara Tadashi 
Published: July 2006

Abstract
5-(4-Pyridyl)-2-thiophenecarbaldehyde has been prepared as a new fluorescent derivatization reagent and utilized for the determination of primary alkylamines. A definite detection limit was achieved for the amines by using a method based on the combination of precolumn derivatization and postcolumn hydrolysis–detection of the original fluorescent reagent regenerated from the derivatives. Approximately a 0.1 pmol (10 μl injection) (S/N=2) of detection limit was obtained. A dynamic linear range was over 5 orders of magnitude.
Deuterium Isotope Effects on Aromatic Carbon-13 Chemical Shifts. II. Dependence of One- and Two-bond Isotope Shifts on Electron Densities of Substituted Benzenes
Authors: Nakashima Yasuki , Nakane Hideki , Ban Sadanori , Takahashi Kensuke 
Published: July 2006

Abstract
One- and two-bond deuterium isotope effects (1Δ and 2Δ) on 13C chemical shifts of substituted benzenes are reported. The one-bond effects are correlated with the π-electron densities on the observed carbons, and the two-bond effects are correlated with the σ-electron densities on the observed carbons. There are no correlations between 1Δ and 2Δ. 1Δs reflect the direct change on going from a C–H bond to a C–D bond, but 2Δs reflect their indirect effect.
Preparation of Fluoroarenes in One-Pot Diazotization and Fluoro-Dediazoniation of Aminoarenes Using HF or HF-Base. The Functions of Bases in the HF Solution
Authors: Fukuhara Tsuyoshi , Sasaki Satoshi , Yoneda Norihiko , Suzuki Akira 
Published: July 2006

Abstract
In a one-pot diazotization of anilines followed by fluoro-dediazoniation in situ using HF or HF with bases (HF-Base) as a solvent, the diazotization stage has been found to play the most important part to yield fluoroarenes effectively. Diazotization of anilines was greatly influenced by the composition of the HF solution, and greatly enhanced by employing appropriate amounts of bases, such as pyridine. On the other hand, fluorodediazoniation of diazonium salts, once formed, took place very readily in HF or HF-Base to produce fluoroarenes in high yield, although such bases served to slow down the rate of decomposition of diazonium salts to some extent.
Structure-Activity Relationship of Escherichia coli Heat-Stable Enterotoxin: Role of Ala Residue at Position 14 in Toxin-Receptor Interaction
Authors: Yamasaki Shinji , Sato Takashi , Hidaka Yuji , Ozaki Hiroshi , Ito Hideaki , Hirayama Toshiya , Takeda Yoshifumi , Sugimura Takashi , Tai Akira , Shimonishi Yasutsugu 
Published: July 2006

Abstract
A heat-stable enterotoxin (STh) produced by a human strain of enterotoxigenic Escherichia coli consists of 19 amino residues including 6 half-cystine residues. Analogs of STh from positions 6 to 19 with replacements of the Ala residue at position 14 by other amino acid residues were synthesized by a solid-phase method and examined by biological and biochemical methods. This Ala residue was demonstrated to be very important for expression of the toxicity of STh and for interaction of the toxin with its receptor protein(s).
Absorption Spectra of the Cationic Radical Salt of 3,3′,5,5′-Tetramethylbenzidine in Acetonitrile
Authors: Awano Hiroshi , Ohigashi Hiroji 
Published: July 2006

Abstract
The absorption spectrum of 3,3′,5,5′-tetramethylbenzidine (TMB) perchlorate in acetonitrile strongly depends on both the temperature and concentration. Analyzing the absorption band around 660 nm, which corresponds to the charge transfer from TMB to (TMB)2+, the equilibrium constant and the enthalpy change of the charge-transfer complex formation at 25°C have been obtained as 1.9×104 mol−1 dm3 and −66.2 kJ mol−1, respectively.
Reactions of Arylazoxy Aryl Sulfones with α,β-Unsaturated Esters and Nitriles in the Presence of a Palladium(0) Catalyst
Authors: Kamigata Nobumasa , Satoh Mayumi , Fukushima Takamasa 
Published: July 2006

Abstract
The reactions of arylazoxy aryl sulfones (1) with α,β-unsaturated esters and nitriles in the presence of a palladium(0) catalyst were found to give aryl-substituted esters and nitriles in good yield.
Synthesis and Heteroannulation of 3,4-Dibenzoyl-1-phenyl-2a,5-diazabenz[cd]azulene
Authors: Abe Noritaka , Ueno Tamae 
Published: July 2006

Abstract
3,4-Dibenzoyl-1-phenyl-2a,5-diazabenz[cd]azulene (2b) was synthesized by cycloaddition of 8-amino3-phenyl-1-azaazulene with dibenzoylacetylene. Heteroannulation to 2b has been achieved by reactions with hydrazine and phosphorus pentasulfide.
Crystal and Electronic Structures of Radical Salts of 2,7-Bis(methylthio)-1,6-dithiapyrene (MTDTPY) and 2,7-Bis(methylseleno)-1,6-dithiapyrene (MSDTPY)
Authors: Kawamoto Atsushi , Tanaka Jiro , Oda Akio , Mizumura Hideshi , Murata Ichiro , Nakasuji Kazuhiro 
Published: July 2006

Abstract
Radical salts of 2,7-bis(methylthio)-1,6-dithiapyrene (MTDTPY) with PF6− and 2,7-bis(methylseleno)-1,6-dithiapyrene (MSDTPY) with AsF6− and [Au(CN)2]− were prepared using an electrochemical method. The crystal structures of these salts were determined with an X-ray method. MTDTPY–(PF6)0.67 (triclinic P\bar1) and MSDTPY–(AsF6)0.67 (triclinic P\bar1) form uniform segregated stacks of MTDTPY and MSDTPY molecules with interplanar distances of 3.40 and 3.59 Å, respectively. Short S–S contacts of 3.46–3.56 Å for MTDTPY–(PF6)0.67 and 3.54–3.61 Å for MSDTPY–(AsF6)0.67 were observed between the columns. The chains of disordered PF6− and AsF6− were found to be parallel to the stack axis. Analysis of the disorder showed a stoichiometric ratio of the DTPY derivatives and counter anions at 1:0.67; the formal charge of MTDTPY and MSDTPY was estimated at +0.67. MSDTPY–Au(CN)2 (monoclinic P2/c) forms a segregated stack of MSDTPY molecules with an interplanar distance of 3.40 Å. The optical reflection spectra of these crystals were measured with polarized light both parallel and perpendicular to the stack axis. In spite of the short intercolumnar S–S contacts, the spectra of MTDTPY–(PF6)0.67 and MSDTPY–(AsF6)0.67 showed a strong one-dimensional character. The optical conductivity spectra (σ(ω)) and the real part of the dielectric constant (ε′(ω)) along the stack axis were obtained by means of Kramers–Kronig transformation. Both the conductivity spectra and the dielectric constant substantially differ from the simple Drude model. These results were analyzed with a one-dimensional electron-localization model in a disordered system with the following optical parameters: ωp=14000 cm−1; τi=2.2×10−15s (τi−1=2400 cm−1) and εcore=3.0 for MTDTPY-(PF6)0.67 and ωp=10000 cm−1; τi=2.2×10−15 (τi−1=2400 cm−1) and εcore=3.5 for MSDTPY–(AsF6)0.67. From the spectra of MSDTPY–Au(CN)2, the on-site Coulomb repulsion U was estimated at 6000 cm−1.
Solvent Effect on Reaction Mechanism and Kinetics of Triplet Ion Pairs between Chloranil and Acenaphthene
Authors: Kobashi Harumichi , Okabe Shunichi , Ohsugi Youichi , Shizuka Haruo 
Published: July 2006

Abstract
A comparative study on decay dynamics of triplet ion pairs has been performed for the chloranil (CA) and acenaphthene (ACN) system in both the nonpolar solvent benzene (BZ) and the moderately polar 1,2-dichloroethane (DCE) by means of nanosecond laser photolysis. Triplet chloranil (3CA) is quenched by ACN to yield the (1:1)triplet ion pair (IP1), 3(CA\ewdot, ACN\underset.+), in BZ, while the (1:2) ion pair (IP2), 3(CA\ewdot, ACN2\underset.+), in DCE as well as IP1 in the concentration range less than 1 M (1 M=1 mol dm−3) of ACN. Temperature dependence of the transient spectra indicates that IP2 is energetically lower than IP1 in DCE. In BZ, IP1 decays through both back electron transfer (back ET) to the ground state of the donor-acceptor pair and intra-ion-pair proton transfer (PT) leading to formation of the chloranil semiquinone radical (CAH·). In DCE, both IP1 and IP2 disappear through the back ET and ionic dissociation (ID) to free anion and cation radicals, while no PT is observed. The efficiency of ID is greater in IP2(0.70) than in IP1(0.33). From temperature dependence on decay profiles, Arrhenius parameters are obtained for each decay process of the ion pairs. The PT process in BZ requires a considerably high activation energy (30 kJ mol−1), while the ID process in DCE proceeds with practically no activation energy for both IP1 and IP2. The activation barrier for the back ET of IP1 in BZ is obtained to be 13 kJ mol−1 which is significantly greater than that (∼0 KJ Jmol−1) in DCE. This solvent effect may be attributed to the difference in the ion pair states: i.e., a contact type in BZ and solvent-separated type in DCE.
Intra- and Intermolecular Electron-Transfer Reaction of Viologen-Linked Copper(II) Schiff Base Complexes
Authors: Tsukahara Keiichi , Yoshida Youko , Kasuga Kuninobu 
Published: July 2006

Abstract
The copper(II) Schiff base complexes linked to viologen via number 3 and 4 of methylene groups were synthesized and characterized. The complexes are the binuclear type, the second Cu(II) of which binds with two iodide ions to the phenolate edge of N,N′-bis(salicylidene)ethylenediaminatocopper(II). A pulse radiolytic study in acetonitrile showed that the intramolecular electron transfer from the viologen radical to the Cu(II)O2I2 site occurred along with an intermolecular electron transfer between the viologen radical and the Cu(II)O2I2 site of the other complexes existing in excess; also, the number of the methylene groups (3 and 4) little affected the intra- and intermolecular electron-transfer rate. A trinuclear copper(II) Schiff base complex linked to viologen via number 5 of methylene groups was also synthesized and characterized.
Sesquiterpenes from the Rhizomes of Ligularia dentata Hara
Authors: Naya Keizo , Okayama Tohru , Fujiwara Masaaki , Nakata Makoto , Ohtsuka Tsutomu , Kurio Seiko 
Published: July 2006

Abstract
From the rhizomes of Ligularia dentata Hara two new compounds, a phenolic norsesquiterpene ligudentatol (2), and a eudesmanoid ligucyperonol (6), have been isolated in addition to the known caryophillene (1) and additional three phenolic norsesquiterpenes (3, 4, and 5). The structures and stereochemistries of 2 and 6 have been established by a combination of spectroscopic and chemical methods, and by correlation with known ligujapone (4) and (+)-α-cyperone (11), respectively.
2-(Trifluoroacetyloxy)pyridine as a Mild Trifluoroacetylating Reagent of Amines and Alcohols
Authors: Keumi Takashi , Shimada Masakazu , Morita Toshio , Kitajima Hidehiko 
Published: July 2006

Abstract
A new trifluoroacetylating reagent, 2-(trifluoroacetyloxy)pyridine (TFAP), was prepared by the reaction of 2-pyridinol and trifluoroacetic anhydride. TFAP has been found to be effective in the trifluoroacetylation of aliphatic and aromatic amines and alcohols including phenol under mild conditions. The reaction of p-nitrophenol with TFAP in ether gave the hydrogen-bonded complex between the phenol and 2-pyridone. This reagent has also been shown to be useful for the intramolecular dehydration of aldehyde oximes and amides to give nitriles in high yields.
High-Pressure Cycloaddition of Tropones to Ethoxyethene. An Occurrence of [4+2] and [8+2] Cycloadditions
Authors: Mori Akira , Li Zhi-Hong , Takeshita Hitoshi 
Published: July 2006

Abstract
Although thermal cycloaddition of tropone to ethoxyethene under ordinary pressure conditions is synthetically impractical, the reaction was greatly improved under 10000 bar to give six products with 95% conversion (1 bar=105 Pa): the major products obtained in 66% yield were 9α- and 9β-ethoxybicyclo[3.2.2]nona-3,6-dien-2-ones, Diels–Alder adducts, which were accompanied by other two 8-ethoxy derivatives and two [8+2] cycloadducts. 2-Methoxy- and 2-chlorotropones similarly gave better results under high-pressure conditions. The 13CNMR spectra of these Diels–Alder adducts provided useful information regarding structure elucidations.
Synthetic Photochemistry LV. Characterization of the Lumiketone- Type Photoproducts, Bicyclo[3.2.0]hept-3-en-2-ones, from 2,6-Cycloheptadien-1-ones
Authors: Mori Akira , Kubota Tadahiko , Ikeda Yukari , Takeshita Hitoshi 
Published: July 2006

Abstract
Unlike the parent 2,6-cycloheptadien-1-one, the UV-light irradiation of polysubstituted 2,6-cycloheptadien-1-ones gave bicyclo[3.2.0]hept-3-en-2-ones, lumiketone-like products, which subsequently photoisomerized to bicyclo[2.2.1]hept-2-en-7-ones. The reaction of cycloheptadienones to lumiketones was proven to proceed via a triplet excited state from both sensitization and quenching experiments.
Synthesis and Characterization of Co(III) Complexes with 1,4,7,10-Tetraazacyclotetradecane, -pentadecane, and -hexadecane
Authors: Tsuchimoto Masanobu , Kita Masakazu , Nonoyama Matsuo , Fujita Junnosuke 
Published: July 2006

Abstract
New cobalt(III)-1,4,7,10-tetraazacyclotetradecane (N47), -pentadecane (N48), and -hexadecane (N49) complexes, trans-[CoCl2(N4x)]+ (x=7 (two isomers), 8 (two isomers), 9 (one isomer)), trans-[Co(NO2)2(N4x)]+ (x=7, 8, 9, one isomer), cis-[Co(NO2)2(N47)]+ (one isomer), and [Co(en)(N4x)]3+ (x=7, 8, one isomer) were synthesized and characterized. For analogous 1,4,7,10-tetraazacycloundecane (N46) complexes, two isomers for each of cis-[Co(NO2)2(N46)]+ and [Co(en)(N46)]3+ were also obtained and were found to isomerize to each other in acetonitrile. The ligand field parameters of nitrogen Δ(N) and chlorine Δ(Cl) estimated from the observed ligand field bands of trans-[CoCl2(N4x)]+ show a correlation between them; with an increase in ring size of N4x, the Δ(N) value decreases, while the Δ(Cl) value increases. The reduction potentials for each series of the dichloro, dinitro, and en complexes become less negative with an increase in ring size of N4x.
Preparation of Graphite Single-Crystal from an Iron Solution by a Temperature-Gradient Method
Authors: Sumiyoshi Yoshihiro , Ushio Masumi , Suzuki Sadao 
Published: July 2006

Abstract
A graphite single-crystal with maximum dimensions of 30 mm in diameter and 0.24 mm thick was prepared from an iron solution by a temperature-gradient method. A flux of 300–500 g of electrolytical iron, 10 g of graphite powder and silicon powder of 0–5 g for the flux weight were charged in a graphite crucible. Large and thickened graphite single-crystal films of good quality were prepared at 2100°C by repeating 4 times the heating and cooling processes. The cell parameters of the graphite single-crystal film were ao=2.463±0.003 and co=6.708±0.001 Å. The optimum amount of silicon additive was 1 wt% for the flux weight. In order to increase the thickness along the c-axis of graphite single-crystal films, the number of heating and cooling processes should be increased.
Effect of Surface Fluorination with CCIF3 on Catalytic Activity of SiO2–Al2O3 for Alkylation of Benzene with Propene
Authors: Kurosaki Akito , Okazaki Susumu 
Published: July 2006

Abstract
For surface modification, the vapor-phase fluorination of SiO2–Al2O3 with CCIF3 was carried out at various temperatures ranging from 350 to 550°C in a conventional flow reactor. It was found that surface fluorination at about 400°C was especially effective for the enhancement of both the catalytic activity and the maintenance of the catalytic activity for the vapor-phase alkylation of benzene with propene. Ammonia–TPD revealed that the surface acidity of SiO2–Al2O3 could be somewhat increased by surface fluorination at about 400°C. The vapor-phase adsorption of water, hexane, propene, benzene, and cumene showed that the SiO2–Al2O3 surface became hydro- and lipo-phobic after surface fluorination. Thus, an enhancement of catalytic activity maintenance was assignable to a decrease in the affinity of the catalyst surface to reaction products.
Topochemical Double Photocyclodimerization of Ris(butoxycarbonyl)-Substituted Tetrathiafulvalene in the Crystalline State
Authors: Venugopalan P , Venkatesan K 
Published: July 2006

Abstract
Crystals of bis(butoxycarbonyl)-substituted tetrathiafulvalene having three reactive double bonds yield upon irradiation two products, a “cage product” (II) as well as another (I) by the participation of a pair of reactive double bonds. The formation of both the products is understood based on the molecular packing in the crystal lattice. The circumstances leading to the formation of more than one photoproduct in the crystalline state and the question regarding the sulfur atom as a steering group in the context of crystal engineering are discussed.