bluuebunny/crossref_metadata_2025_split huggingface dataset:
Synthesis of [l-α-Aminomyristic Acid3,3′]gramicidin S and Its Interaction with Phospholipid Bilayer
Authors: Mihara Hisakazu , Nishino Norikazu , Ogawa H Iyehara , Izumiya Nobuo , Fujimoto Tsutomu 
Published: July 2006

Abstract
A lipophilized gramicidin S (GS) analog was synthesized by introducing l-α-aminomyristic acid (Amy) residues instead of l-leucine residues by the conventional solution method. Influences of lipophilization of GS on interaction with phospholipid liposomes were examined by the peptide-induced dye-leakage assays using carboxyfluorescein (CF)-entrapped liposomes of dipalmitoyl-Dl-α-phosphatidylcholine (DPPC). The [Amy3,3′]GS (Amy-GS) had the enhanced ability of CF-leakage below the phase-transition temperature of DPPC liposomes as compared with GS, while it showed weaker leakage ability at higher temperature. Conformation of Amy-GS in solution and in the presence of liposomes was similar to that of GS, which was elucidated by CD and 1H NMR measurements. The Amy residue can be utilized to enhance the affinity of a peptide to membrane environment without changing conformation of an original peptide.
Catalytic Properties of Lanthanide Metals on Silica
Authors: Imamura Hayao , Konishi Tomohiro , Tokunaga Yu-ichi , Sakata Yoshihisa , Tsuchiya Susumu 
Published: July 2006

Abstract
Silica (SiO2) powders reacted readily with Eu and Yb which were dissolved in liquid ammonia, resulting in the formation of active lanthanide/SiO2 catalysts (Eu/SiO2 and Yb/SiO2). The reactions of dissolved lanthanide metals in liquid ammonia with SiO2 were characterized by FT-IR studies and various catalytic reactions. The catalytic behavior varied markedly with varied levels of lanthanide loading. At low loadings ( &lt; ca. 15 wt%), the dissolved lanthanide selectively reacted with the hydroxyl groups on SiO2 to form ≡SiO–MNH2 species (M = Eu or Yb). The thermal treatment above 573 K led to the decomposition of this species to the inactive nitride MN. The catalyst with low loadings exhibited very high activity for the disproportionation of cyclohexadiene at room temperature. At high loadings ( &gt; ca. 15 wt%), after the first portion of added lanthanide was consumed for the reaction with surface hydroxyl groups, subsequent lanthanide seems to deposit on SiO2 in an active metallic form. The catalytic properties were very similar to those reported for lanthanide metal particles prepared by the metal vapor technique. The catalyst with high loadings discriminated between internal and terminal C–C triple bonds for the hydrogenation of alkyne; thus, 2-butyne was readily converted to cis-2-butene, whereas 1-butyne, propyne, and acetylene were not hydrogenated at all.
Crystal Structures of Mono- and Di-nuclear Nickel(II) Complexes Derived from the Substitution Reaction of [Ni(Me2[14]dienatoN4)]I and Each of Benzoyl Chloride and Isophthaloyl Dichloride
Authors: Matsumoto Naohide , Koikawa Masayuki , Baba Norihisa , Okawa Hisashi 
Published: July 2006

Abstract
The reactions of (5,7-dimethyl-1,4,8,11-tetraazacyclotetradeca-4,6-dienato)nickel(II) iodide with benzoyl chloride and isophthaloyl dichloride gave mononuclear 1 and dinuclear 2 nickel(II) complexes, respectively. Complex 1 crystallized in space group P21/a with Z = 4, a = 23.704(10), b = 7.726(3), c = 11.581(4) Å, β = 104.16(3)°, V = 2056.5(1.4) Å3. The benzoyl group is positioned at the 6 position of the macrocycle and tilted to the NiN4 plane by 67.9° due to the steric hindrance from two methyl groups. Complex 2 crystallized in space group with Z = 2, a = 12.124(3), b = 16.484(4), c = 10.243(4) Å, α = 94.84(3), β = 111.04(3), γ = 80.69(2)°, V = 1884.6(1.1) Å3. The metal ions are 12.777(6) Å apart, and the two coordination planes are nearly co-planar, the dihedral angle between them being 164.4°.
Solvent Extraction of Anionic Chelate Complexes of Lanthanum(III), Europium(III), Lutetium(III), Scandium(III), and Indium(III) with 2-Thenoyltrifluoroacetone as Ion-Pairs with Tetrabutylammonium Ions
Authors: Noro Junji , Sekine Tatsuya 
Published: July 2006

Abstract
The solvent extraction of lanthanum(III), europium(III), lutetium(III), scandium(III), and indium(III) in 0.1 mol dm−3 sodium nitrate solutions with 2-thenoyltrifluoroacetone (Htta) in the absence and presence of tetrabutylammonium ions (tba+) into carbon tetrachloride was measured. The extraction of lanthanum(III), europium(III), and lutetium(III) was greatly enhanced by the addition of tba+; this could be explained in terms of the extraction of a ternary complex, M(tta)4−tba+. However, the extractions of scandium(III) and indium(III) were nearly the same when tba+ was added. The data were treated on the basis of the formation equilibrium of the ternary complex from the neutral chelate, M(tta)3, with the extracted ion-pairs of the reagents, tta−tba+, in the organic phase. It was concluded that the degree of association of M(tta)3 with the ion-pair, tta−tba+, is greater in the order La(tta)3 ≈ Eu(tta)3 &gt; Lu(tta)3, or that the stability of the ternary complex in the organic phase is higher in the order La(tta)4−tba+ ≈ Eu(tta)4−tba+ &gt; Lu(tta)4−tba+. This is similar to those of adduct metal chelates of Htta with tributylphosphate (TBP) in synergistic extraction systems.
Enzymatic Kinetic Resolution of [4](1,2)Ferrocenophane Derivatives
Authors: Izumi Taeko , Tamura Futoshi , Sasaki Kenryo 
Published: July 2006

Abstract
The enol acetate of (±)-[4](1,2)ferrocenophan-1-one was enantioselectively hydrolyzed by using lipase PS to afford (+)-(R)-[4](1,2)ferrocenophan-1-one and (+)-(S)-1-acetoxy[4](1,2)ferrocenophan-1-ene. By using lipase PS or lipozyme, (±)-1-acetoxy[4](1,2)ferrocenophane was resolved into the (+)-(1R)-alcohol and the (−)-(1S)-acetate. The lipase-mediated transesterification and esterification of (±)-1-hydroxy[4](1,2)ferrocenophane led to the formation of the (+)-(1R)-ester and the (−)-(1S)-alcohol.
1-Haloalkyl Aryl Sulfoxides as Useful Agents in Synthesis of α-Halo Ketones: A New Synthesis of α-Halo Ketones, α-Halo α,β-Unsaturated Ketones, and α-Halo Cross Dienones from Aldehydes
Authors: Satoh Tsuyoshi , Itoh Norifumi , Onda Ken-ichi , Kitoh Yasushi , Yamakawa Koji 
Published: July 2006

Abstract
α-Halo α-sulfinyl ketones were synthesized in two steps from 1-haloalkyl aryl sulfoxides and aldehydes in high yields. Desulfinylation of the α-halo α-sulfinyl ketones was performed with ethylmagnesium bromide in ether at low temperature to afford α-halo ketones via magnesium enolates in high yields. The magnesium enolate intermediates were trapped with various electrophiles such as deuterium oxide, ethyl chloroformate, and chlorotrimethylsilane. Trapping of the magnesium enolate intermediate with carbonyl compounds afforded a new type of the directed aldol reaction. Desulfinylation of the sulfinyl group of the α-halo α-sulfinyl ketones under thermal conditions gave α-halo α,β-unsaturated ketones or α-halo cross dienones.
A Formation of a Fusarubin Carbon Skeleton
Authors: Tanoue Yasuhiro , Terada Akira 
Published: July 2006

Abstract
A compound having a fusarubin carbon skeleton, N,N-diethyl-3-(2-hydroxypropyl)-1,4,5,6,8-pentamethoxy-2-naphthamide, was prepared from 1,4,5,6,8-pentamethoxy-2-naphthalenemethanol in 5 steps via N,N-diethyl-1,4,5,6,8-pentamethoxy-7-trimethylsilyl-2-naphthamide.
Electrochemically Oxidative Polymerization of 1,2,3,4-Tetrahydronaphthalene
Authors: Akiyama Fuminori 
Published: July 2006

Abstract
Electrochemical oxidation of 1,2,3,4-tetrahydronaphthalene (1) at higher anode potential than 3.0 V and high concentration of 1 gave a polymer of 1. The polymer deposited on an anode was slightly soluble in organic solvents and the polymer separated from the solution had number average molecular weight up to 1500.
Photochemistry of 1,2 : 4,5-Benzenebis(dicarboximide). Insertion of Alkenes into the C-N Bond of N,N′-Dihexyl-1,2 : 4,5-benzenebis(dicarboximide)
Authors: Kubo Yasuo , Tanabe Seiichi 
Published: July 2006

Abstract
In the photolyses of acetonitrile solutions of N,N′-dihexyl-1,2 : 4,5-benzenebis(dicarboximide) (1) and alkenes, insertion of the double bond in the alkenes into the C–N bond of the imide function of 1 was observed. The insertion reaction proceeded along with a retention of the stereochemistry of the alkenes in reactions with trans- and cis-2-butene.
Random Packing of Ions in the Ionic Glass xKNO3·(100−x)Sr(NO3)2 (x = 22–60) and the γ-Ray Induced Cleavage of K–ONO2 Bonds
Authors: Nishida Tetsuaki , Ohara Masakazu , Takashima Yoshimasa 
Published: July 2006

Abstract
The IR peak positions of the ν3 (1386 cm−1), ν2 (814 cm−1), and ν4 (737 cm−1) modes of NO3− are constant in nitrate glasses. This is also the case for the Sr–ONO2 (1439 cm−1) and K–ONO2 (1270 cm−1) bonds. The latter peak is observed only in glasses in which the degeneracy is removed due to the lowered symmetry (D3h → C2ν).
Shape-Selectivity Effect of Highly Reduced Cobalt-Exchanged Zeolite in the Fischer-Tropsch Reaction
Authors: Lee Young Seub , Koh Dong Jun , Chung Jong Shik , Kim Young Gul 
Published: July 2006

Abstract
Cobalt-exchanged zeolites, when reduced by sodium injection followed by treatment in dihydrogen at 450 °C, showed an enhanced production of long chain and linear form of hydrocarbons with a bimodally distributed non Schultz-Flory distribution. Long chain linear hydrocarbons of C12–C20 were believed to be produced on cobalt clusters located inside zeolite cage.
Vapor Phase Carbonylation of Organic Halo Compounds
Authors: Yasuda Kensei , Shinoda Kiyonori 
Published: July 2006

Abstract
RCH2X, s-C4H9X, and C6H5X were methoxycarbonylated with carbon monoxide and methanol into methyl carboxylates in the presence of rhodium trichloride/potassium iodide supported on activated charcoal. The reactivity decreased in the order: X = I &gt; Br &gt; Cl.
Synthesis and Photochromism of Dibenzylviologen Coupled with 5,10,15,20-Tetraphenylporphyrin or Its Metal Complex via a Carbonyloxy Spacer
Authors: Kamogawa Hiroyoshi , Koga Kazuhi 
Published: July 2006

Abstract
1,1′-Dibenzyl-4,4′-bipyridinium (viologen) coupled with 5,10,15,20-tetraphenylporphyrin or its metal complex via a carbonyloxy spacer was prepared by modification of 5,10,15,20-tetrakis(4-carboxyphenyl)porphyrin. The viologens in polar aprotic media brought about increases in the visible absorption characateristic of, but different in stability from, those of the conventional viologen radical cations upon irradiation with visible light (photochromism).
Synthesis of Two Types of Intercalation Compounds of K4Nb6O17 with Tris(2,2′-bipyridyl) Metal Complex Ions
Authors: Nakato Teruyuki , Sakamoto Daisuke , Kuroda Kazuyuki , Kato Chuzo 
Published: July 2006

Abstract
K4Nb6O17 is a layered material with two different types of interlayer spaces, interlayer I and interlayer II. It was found that two types of intercalation compounds of K4Nb6O17 with alkylammonium ions were formed, one in which alkylammonium ions were present in interlayer I only, and the other in which they were present in both the interlayers. Intercalation of [M(bpy)3]2+ (M: Fe, Ru, Ni) into K4Nb6O17 was carried out using these two types of alkylammonium-intercalated K4Nb6O17 as the intermediates. Ion exchange reactions of the interlayer alkylammonium ions for the complex ions were conducted, and the formation of two types of products, one in which [M(bpy)3]2+ ions were present in interlayer I only and the other in which they were present in both the interlayers, was confirmed from powder X-ray diffraction patterns and the compositions of the products.
Photosensitized Oxidation of Ethanol on Alkoxy-Derived TiO2 Powders
Authors: Kato Kazumi 
Published: July 2006

Abstract
In order to consider the factors affecting the photocatalytic properties of TiO2, TiO2 powders with controlled characteristics such as the crystalline phase, the crystallite size, and the specific surface area were prepared by hydrolyzing Ti(Oi-C3H7)4. The photocatalytic property of the photo-oxidation of ethanol on the powder depended on the crystallite size and the microstructure. Ethanol was oxidized completely in the suspensions of the powders after illumination for 2 h while being bubbling with oxygen. The crystallite sizes of the powders were in the range of 20–30 nm. The microstructure of the powders consisted of the aggregation of fine and individual particles.
Synthesis and Characterization of Doubly-Strapped Porphyrins
Authors: Nagata Toshi 
Published: July 2006

Abstract
Synthesis of a “doubly-strapped” porphyrin is described, which has two –O(CH2)10O– straps on both sides of the porphyrin ring. This porphyrin did not form the zinc complex when treated with zinc acetate, even under forcing conditions. Such inertness toward zinc insertion can be attributed to the steric hindrance of the –O(CH2)10O– straps. Oligoporphyrins with one strapped ring were also synthesized. Reaction of these porphyrins with zinc acetate resulted in insertion of zinc into all non-strapped rings, while the strapped ring remained unchanged. These doubly-strapped porphyrins will be useful in constructing oligoporphyrins as photosynthetic model compounds, in which photochemical and electrochemical properties are controlled by selective metal insertion.
A Convenient Synthetic Method of 2-Cyano-6-methoxybenzothiazole, –A Key Intermediate for the Synthesis of Firefly Luciferin
Authors: Toya Yoshiaki , Takagi Masaharu , Nakata Hisao , Suzuki Nobutaka , Isobe Minoru , Goto Toshio 
Published: July 2006

Abstract
The title compound was prepared in one step from commercially available 2-amino-6-methoxybenzothiazole by using the Sandmeyer cyanation reaction. The result enabled us to synthesize firefly luciferin effectively from this amino compound through three steps in 36% overall yield.
Numerical Formulation of Pigment Release from Magnetically Anisotropic Gel Beads with Respect to the Magnetic Moment in an Alternating Magnetic Field
Authors: Sakai Yasuzo , Kuwahata Mitsuyoshi , Takahashi Fujio 
Published: July 2006

Abstract
Quantitative measurements were carried out regarding the change of pigment release (ΔCP/CP) from magnetically anisotropic gel beads (MA gel beads) prepared in the presence and absence of an alternating magnetic field in various conditions. The rate of pigment release from the MA gel beads was found to be proportional to the magnetic moment of the beads. The magnetic moment of the MA gel beads was proportional to the concentration of ferrite (CF) and the strength of a static magnetic field (HS) used for the preparation of the MA gel beads. In this connection, M1/V was proportional to CF·HS, where M1 and V are the magnetic moment and the volume of a grain of the MA gel beads, respectively. As a result, we derived an experimental equation for the rate of pigment release as a functions of M1, V and the strength of an alternating magnetic field (HA) as ΔCP/CP = kM1HAV−0.5, where k is constant.
Colloidal Dispersions of Platinum and Palladium Clusters Embedded in the Micelles.Preparation and Application to the Catalysis for Hydrogenation of Olefins
Authors: Toshima Naoki , Takahashi Tadahito 
Published: July 2006

Abstract
Colloidal dispersions of platinum and palladium clusters were prepared by the reduction of the corresponding metal salts in the presence of various surfactants. Hydrogen- and photo-reduction methods were examined for the micellar solution of hexachloroplatinic acid. The photo-reduction was proved to be more suitable than the hydrogen-reduction from the viewpoint of small size and good dispersion in the colloidal clusters. The higher surfactant concentration than the critical micelle concentration (cmc) is favorable for the production of the homogeneous colloidal dispersions. The photo-reduction method is also available for the case of palladium. The colloidal platinum and palladium clusters, thus obtained, act as highly active catalysts for the hydrogenation of olefin in an aqueous solution. The colloidal clusters prepared by the photo-reduction method showed higher activity than those prepared by other methods. The roles of the surfactant micelle for the hydrogenation are not only protecting hydrophobic colloidal particles, but also both solubilizing the hydrophobic substrates in an aqueous solution and assisting their approach toward the active site on the surface of the cluster particles. In the hydrogenation of unsaturated fatty acids, the surfactant micelle surrounding the clusters can control the orientation of the substrates, resulting in novel regioselective hydrogenation.
A Simple Method for the Evaluation of Enthalpy of Proton Dissociation in Water
Authors: Tanaka Motoharu , Nomura Hiroyasu , Kawaizumi Fumio 
Published: July 2006

Abstract
A method is proposed for evaluating the ΔH° value for the proton dissociation of an acid HB from the temperature dependence of the dissociation constant Ka: Instead of differentiating the pKa (= −log Ka) value of acid HB with respect to temperature, we select an appropriate acid HA as a reference and plot the quantity X = pKa(HB)−pKa(HA) as a function of reciprocal temperature. The plot was found to be linear with sufficient accuracy for most non-charged or negatively charged acids, for which pKa itself is a complex function of temperature. ΔH° values are thus readily evaluated by linear least-squares fitting. The theoretical background is discussed.
Growth Conditions of Ta3B4 Single Crystals Prepared by the Aluminium-Flux Method
Authors: Okada Shigeru , Lundström Torsten 
Published: July 2006

Abstract
Tantalum boride crystals have been prepared from high temperature aluminium solution using tantalum and boron powders as starting materials in an argon atmosphere. The growth conditions for obtaining relatively large crystals of Ta3B4 in a pure form containing no extra phases were established. The optimum growth conditions for growing Ta3B4 single crystals are the following: Atomic ratios of starting materials B/Ta = 1.33 and Al/Ta = 16.77, soaking temperature 1650 °C, soaking time 5 h and cooling rate 25 °C h−1. The single crystals of Ta3B4 display a grey color, metallic cluster, and a trapezoidal shape. The largest crystals prepared have dimensions of about 0.37 mm × 0.37 mm × 0.40 mm. The crystals are orthorhombic with space group Immm and unit cell dimensions a = 3.2914(8), b = 13.994(3), c = 3.1327(6) Å, and V = 144.29(8) Å3. The X-ray density is 13.490(3) g cm−3.
Thermally Irreversible Photochromic Systems. Substituent Effect on the Absorption Wavelength of 11,12-Dicyano-5a,5b-dihydro-5a,5b-dimethylbenzo[1,2-b:6,5-b′]bis[1]benzothiophene
Authors: Uchida Kingo , Nakamura Shinichiro , Irie Masahiro 
Published: July 2006

Abstract
Cyano- and halogen-substituted 1,2-bis(1-benzothiophen-3-yl)ethene derivatives were synthesized in an attempt to obtain compounds with sensitivity at longer wavelengths. Under UV irradiation, the derivatives underwent ring closure reactions to form the substituted 11,12-dicyano-5a,5b-dihydro-5a,5b-dimethylbenzo[1,2b:6,5-b′]bis[1]benzothiophenes. Among cyano-substituted compounds, the 3,8-dicyano derivative showed an absorption maximum at the longest wavelength, 530 nm, which is 23 nm longer than the maximum of the unsubstituted compound. The absorption maximum of the 3,8-difluoro derivative, on the other hand, was 28 nm shorter than the maximum of the 2,9-difluoro derivative. Although the absorption maximum shift of the calculated values (MO INDO/S) by cyano substitution agreed well with the observed maxima, the calculation hardly reproduced the shift by halogen substitution.
Solvent Effects on the Solvolysis of Neophyl Tosylates
Authors: Fujio Mizue , Goto Mutsuo , Funatsu Kimito , Yoshino Takanori , Saeki Yoshihiro , Yatsugi Ken-ichi , Tsuno Yuho 
Published: July 2006

Abstract
Solvolysis rates of 2-phenyl-2-methylpropyl and 2-(p-methoxyphenyl)-2-methylpropyl p-toluenesulfonates were determined in a wide variety of solvents and the solvent effects were analyzed based on the Winstein–Grunwald equation. The solvent effect on neophyl solvolyses failed to give a single linear correlation with the 2-adamantyl YOTs parameter. There was dispersion behavior for the respective binary solvent series between neophyl kΔ substrates and 2-adamantyl tosylate. The pattern of dispersion could not be interpreted in terms of nucleophilic solvent assistance. The response to the solvent polarity (m value for each binary solvent series) was significantly lower for both the methoxy and the unsubstituted derivatives than the m = 1.0 for the limiting kc solvolysis, and appreciably lower for the methoxy derivative than for the unsubstituted one. Linearity of the solvent effects between both neophyl systems and also between other kΔ substrates implied the existence of a unique kinetic solvent polarity scale YΔ characteristic of the β-aryl-assisted (kΔ) solvolysis. The dispersion behavior and reduced m value for the kΔ solvolysis were compatible with the entire π-delocalization of cationic charge between the assisting aryl-ring and the reaction center in the transition state.
Complex Fluoroberyllates. Synthesis and Physicochemical Characterization of Mixed-Fluoro Complexes of Beryllium Containing Hydrogenoxalate (HC2O4−), Glycinate, and Dihydrogenphosphate (H2PO4−) as Co-Ligands
Authors: Chaudhuri Mihir K , Islam Nashreen S , Tarafder Pranab K 
Published: July 2006

Abstract
Synthesis of novel mixed complex fluoroberyllates of the types M2[BeF3(HC2O4)]·H2O (M = NH4 or Na), K2[BeF3(HC2O4)], M2[BeF3(NH2CH2COO)]·H2O (M = NH4 or Na), and M2[BeF2(H2PO4)2] (M = NH4 or K) has been achieved from the reaction of Be(OH)2 with MF and the corresponding co-ligands viz., oxalic acid, glycine, and orthophosphoric acid, at pH ca. 2. Vibrational spectroscopic evidences have been provided in respect of co-ordinated F− and the ligands HC2O4−, NH2CH2COO−, or H2PO4−. IR spectra of ammonium salt of the complexes demonstrate the presence of hydrogen bonding.
Substituent Effect on the Enantioface-Differentiating Reaction of (R)-[Lithiomethyl p-Tolyl Sulfoxide] with m- or p-Substituted Acetophenones
Authors: Kunieda Norio , Nokami Junzo , Kinoshita Masayoshi 
Published: July 2006

Abstract
When lithiomethyl p-tolyl sulfoxide derived from (R)-(+)-[methyl p-tolyl sulfoxide] was allowed to react with acetophenones which have a variety of m- or p-substituents, the corresponding diastereometic mixture of β-hydroxy sulfoxides (RsSc and RsRc) was produced. The degree of enantioselectivity was affected by the nature of the substituent on benzene ring. The logarithms of the RsSc/RsRc values thus obtained gave a good correlation with Hammett’s σ values, affording a negative straight line. The results have been discussed in view of the stereochemical cource of the reaction.
Synthesis of 3-(Alditol-1-yl)triazolo[4′,3′:2,3]-1,2,4-triazino[5,6-b]indoles
Authors: Mousaad Ahmed , Abdel Hamid Hamida , El Nemr Ahmed , H. El Ashry El Sayed 
Published: July 2006

Abstract
A series of the hydrazones were prepared by the reaction of 3-hydrazino-5H-1,2,4-triazino[5,6-b]indole (1) with monosaccharides, and their acetylation was studied. Cyclodehydrogenation of the hydrazones gave 3-(substituted)-10H-1,2,4-triazolo[4′,3′:2,3][1,2,4]triazino[5,6-b]indole, whose acetylation and partial acetylation were carried out. The ring-chain tautomerism of the hydrazones promoted their heterocyclization. The linear structure, and not that of the angular isomer, has been selected for the products. This structure has been confirmed from a model study of the cyclization of the acetaldehyde derivative of 1, which was found to be identical with that product obtained from the reaction of 4,5-diamino-3-methyl-1,2,4-triazole with isatin. Periodate oxidation of the hydrazones and their cyclized products was also studied.
Molecular Interactions between Triazene 1-Oxides and Tetracyanoethylene
Authors: Nour El-Din Ahmed Moukhtar , Hassan Alaa A , Mohamed Shaaban K , Abd Elatif Fathy F , El-Faham Hassan A 
Published: July 2006

Abstract
1,3-Diaryltriazene 1-oxides formed stable (1 : 1) charge-transfer complexes with tetracyanoethylene in different solvents, which were studied spectrophotometrically. The stability constants of the complexes were affected by substituents and solvent polarities. Likewise the thermodynamic properties ΔG, ΔH, and ΔS depend on the solvent polarities.