bluuebunny/crossref_metadata_2025_split huggingface dataset:
Receptor Interactions of Synthetic Morphiceptin Analogs Containing Phenylalanine Homologs in Position 4
Authors: Sakaguchi Kazuyasu , Costa Tommaso , Sakamoto Hiroshi , Shimohigashi Yasuyuki 
Published: July 2006

Abstract
A series of phenylalanine homologs with elongated phenylalkyl side chains (R = –(CH2)n-C6H5, n = 1–4) have been incorporated into opioid peptide morphiceptin at position 4 in order to elucidate a role of the amino acid residue in the molecular mechanism of receptor activation. The receptor specificity and selectivity of peptides synthesized were examined in the radio-ligand receptor binding assays using tritiated DAGO- and DADLE-enkephalins. [Phe4]Morphiceptin was most potent for the μ receptors and showed the most pronounced μ/δ-receptor selectivity with a specific ratio of 410. Its μ-affinity was about three times stronger than morphiceptin. All analogs showed very similar CD spectra, suggesting that these peptides have a similar backbone conformation. The results strongly suggest that, besides the backbone conformation, the side-chain aromatic rings at positions 1 (Tyr), 3 (Phe), and 4 (Phe) array in a specific stereoorientation and this array is important to activate μ-receptors. Analogs with longer phenylalkyl side chains appeared not to retain such an arrangement due to the steric hindrance caused by the presence of more than two methylene groups.
A Computational Approach to the Structure and Motion of Hexakis(pentyloxy)triphenylene(THE5) in Discotic Mesophase
Authors: Ono Isamu , Kondo Shoichi 
Published: July 2006

Abstract
A molecular dynamics simulation using the atom–atom potential was applied to THE5 of a disk-like mesogenic molecule. The calculations were carried out in a canonical (NVT) ensemble. The results show that the time-averaged molecular properties and molecular ordering are in agreement with experiment. The effects of molecular flexibility in side chains are clearly demonstrated in the profile of the order parameters of each C–H bond.
A Rechargeable Battery Using Electrochemically-Doped Poly(3-vinylperylene) as an Electrode Material
Authors: Jeon Il-Ryon , Noma Naoki , Shirota Yasuhiko 
Published: July 2006

Abstract
A rechargeable battery using electrochemically-doped poly(3-vinylperylene) as a cathode and lithium as an anode was fabricated, and its performance characteristics were examined. The battery exhibits a flat discharge cell voltage at current densities up to 0.8 mA cm−2 with high coulombic efficiency and good cyclability.
Coal Solubilization with Cadmium and Butyl Iodide under Mild Conditions
Authors: Yoneyama Yoshiharu , Nakayama Hiroaki , Nishi Hiroshi , Kato Tsutomu 
Published: July 2006

Abstract
Several coals were treated with Cd and butyl iodide at 130 °C under atmospheric pressure to obtain more detailed information concerning coal-solubilization for a metal–alkyl halide system under mild conditions. The treatment effectively converted coal to benzene-soluble products with an optimum yield of 57 wt%, somewhat less than that obtained in a Zn–butyl iodide system. There was no correlation between the rank of coal used and the benzene solubility. Reactions of model compounds were also carried out under similar conditions. Polynuclear aromatic compounds gave polybutyl-substituted and/or -addition derivatives. Although the alkyl ether linkages were easily cleaved, the aryl ether linkages were not. In addition, many butyl groups were introduced into both the aromatic and aliphatic moieties. These results suggest that the high benzene solubility is attained by an introduction of the many butyl groups, as well as cleavage of the alkyl ether linkages. Also, the introduction of butyl groups into the aliphatic moiety suggests smaller benzene solubilities of Cd-treated coal compared to those of Zn-treated coal. Because most of the products of the model compounds were similar to those obtained in the Zn–butyl iodide system, and some of the butyl groups introduced were rearranged to s-butyl, it is suggested that both alkyl cation reactions and alkyl radical reactions occur competitively in the Cd–butyl iodide system, as well as in the Zn–butyl iodide system.
Studies on n-CdSe/Ti Semiconductor Septum Based Photoelectrochemical Solar Cell in Regard to the Influence of Structural and Compositional Characteristics of the Semiconductor Electrode
Authors: Pandey Ram Nagina , Babu Kondapaneni S Chandra , Singh Dharam , Srivastava Onkar Nath 
Published: July 2006

Abstract
A new type of photoelectrochemical (PEC) solar cell based on semiconductor septum (SC-SEP) photoelectrode has been shown to yield higher electrical power output than the conventional PEC solar cell. In the present study, photoelectrochemical, structural and compositional characteristics of the semiconductor component in n-CdSe/Ti septum, based SC-SEP, PEC solar cell, employing some reversible electrolyte systems under prolonged PEC operation (100 h), revealed that the CdSe photoelectrode undergoes deterioration through ‘Cd’ loss. For example, in the case of the cell Pt, 1 M 3S//n-CdSe/Ti//0.1 M AgNO3 (1 M = 1 mol dm−3), Pt; CdSe showed loss of ‘Cd’. This resulted in decrease of the cell power output (from Vph and Isc of 1.42 V and 20 mA cm−2 to 1.3 V and 13 mA cm−2 respectively). It has been shown in the present investigation that the best way to arrest semiconductor deterioration was by adding 0.1 M Se to polysulfide electrolyte thereby stabilizing this efficient SC-SEP, PEC cell.
Absorption Spectra and Electrical Resistivities of Bis(1,2-dione dioximato)nickel(II) Complexes at High Pressures
Authors: Shirotani Ichimin , Suzuki Kazunaga , Suzuki Toshihiro , Yagi Takehiko , Tanaka Masashi 
Published: July 2006

Abstract
The absorption spectra of [Ni(dmg)2], [Ni(niox)2], [Ni(dpg)2], and [Ni(bqd)2] were studied at various pressures. Two characteristic absorption bands, the metal-to-ligand charge-transfer (M–L) and the 3d–4p bands, were observed in the visible region for these complexes. The interesting spectral features observed under high pressures were: (1) The excitations shift remarkably to lower energies with increasing pressure. (2) The rates of the peak shifts for the d–p and M–L bands increase in the order [Ni(niox)2] &lt; [Ni(dmg)2] &lt; [Ni(dpg)2]. (3) The peak shifts of the M–L bands are much smaller than those of the d–p bands. (4) The absorption intensity of the M–L band of [Ni(niox)2] decreases rapidly above 10 GPa, and the band is hardly observed at around 14 GPa. (5) A new absorption band in [Ni(dpg)2] exists above about 3 GPa. The electrical resistivity of [Ni(dmg)2], [Ni(niox)2], and [Ni(dpg)2] has been studied under high pressures. These complexes are insulators with a resistivity of 1015 Ω cm at atmospheric pressure. The resistivities at around 23 GPa were 50 Ω cm for [Ni(dmg)2], 7 × 105 Ω cm for [Ni(niox)2] and 2 × 103 Ω cm for [Ni(dpg)2].
Dye–Surfactant Interaction in Submicellar Concentration Range
Authors: Dutta Robin Kumar , Bhat Subray Narayan 
Published: July 2006

Abstract
Interactions of cationic dyes, viz., phenosafranine (PSF), safranine O (SFO) and safranine T (SFT) with anionic surfactants, viz., sodium dodecyl sulfate (SDS) and sodium octyl sulfate (SOS) in submicellar concentration ranges have been investigated spectroscopically. The interaction has been shown to be an induced protonation of the dye in the dye–surfactant ion pair. Even though the opposite charges on the dye and the surfactant are the primary requirements for the ion pair formation, it is the hydrophobicity of the surfactant as well as of the dye which induces the protonation. The spectroscopic and thermodynamic parameters show that the orders of effectiveness of the dyes and the surfactants for the interaction are, SFO &gt; SFT &gt; PSF and SDS &gt;&gt; SOS.
Kinetics and Mechanism of Oxidation of Ethyl Phenylthioacetates by Bromamine-B
Authors: Gurumurthy Rajagopal , Sathiyanarayanan Kulathu Iyer , Gopalakrishnan Mannathusamy 
Published: July 2006

Abstract
The kinetics of oxidation of several substituted ethyl phenylthioacetates by bromamine-B (sodium salt of N-bromobenzenesulfonamide) has been studied in 50% (v/v) aqueous ethanol medium. Disodium hydrogenphosphate and sodium dihydrogenphosphate buffer has been used. The reaction is of a total second order, first order each with respect to the reactants. A catalytic effect of mercury has been observed and the order with respect to Hg(II) is one. Electron-releasing substituents generally accelerate the rate while electron-withdrawing groups retard the rate. A good correlation is found to exist between log k2 and Hammett σ constants. Two mechanisms have been proposed, one in presence of Hg(II) and the other in the absence of Hg(II). In presence of Hg(II), rate = k[C1][H2OBr]+ and in the absence of Hg(II), rate = k[S] [H2OBr]+

Susceptibility of the reaction to the steric effect of ortho substituents, has been analyzed in the light of application of Taft’s steric energy relationships.
Lithium Alkylamide-Catalyzed Addition Reaction of Alkylamines to Vinyl Monomers. III. Addition Reaction of p-Substituted Benzylamines to Styrene and Divinylbenzenes
Authors: Hamana Hiroshi , Iwasaki Fuminori , Nagashima Hiroyoshi , Hattori Kazuhisa , Hagiwara Tokio , Narita Tadashi 
Published: July 2006

Abstract
The lithium alkylamide-catalyzed addition reaction of p-substituted benzylamines with m- and p-divinylbenzene was examined in order to synthesize new styrene derivatives. Though divinylbenzene possesses two vinyl groups, 1 : 1 adducts, the N-(p-substituted benzyl)vinylphenethylamines (6, 8) were found to be prepared selectively. The reaction with styrene was also examined as a model reaction. From kinetic studies, the Hammett p values for the addition reaction of p-substituted benzylamines to the styrene, m-divinylbenzene and p-divinylbenzene, were −0.72, −0.67, and −1.1, respectively, at 50 °C.
New Cholestane Bisdesmosides from the Bulbs of Ornithogalum thyrsoides
Authors: Kubo Satoshi , Mimaki Yoshihiro , Sashida Yutaka , Nikaido Tamotsu , Ohmoto Taichi 
Published: July 2006

Abstract
Four new cholestane bisdesmosides have been isolated from the fresh bulbs of Ornithogalum thyrsoides. Their structures were determined by spectroscopic analysis and chemical evidence to be (22S)-5α-cholestane-1β,3β,16β,22-tetrol 1-O-α-l-rhamnopyranoside 16-O-β-d-glucopyranoside (1), (22S)-5α-cholestane-1β,3β,16β,22-tetrol 1-O-α-l-rhamnopyranoside 16-O-(6-O-acetyl-β-d-glucopyranoside) (2), (22S)-5α-cholest-24-ene-1β,3β,16β,22-tetrol 1-O-α-l-rhamnopyranoside 16-O-β-d-glucopyranoside (3), and (22S)-5α-cholest-24-ene-1β,3β,16β,22-tetrol 1-O-α-l-rhamnopyranoside 16-O-(6-O-acetyl-β-d-glucopyranoside) (4), respectively. An advanced Mosher’s method was applied to determine the C-22 absolute configuration. Compound 4 showed inhibitory activity on cyclic AMP phosphodiesterase.
Kinetics and Mechanism of Osmium(VIII) Catalyzed Oxidation of Uric Acid with N-Chloro-p-toluenesulfonamide (Chloramine-T) in Alkaline Medium
Authors: Sharma Nidhi , Mishra Som Kant , Sharma Prem Dutt 
Published: July 2006

Abstract
The kinetics of oxidation of uric acid (UaH2) by chloramine-T (CAT) studied in the presence of osmium(VIII) in alkaline medium conform to a rate law (i)

where K2 and K3 are second dissociation constant of uric acid and formation constant of an intermediate complex respectively. Osmium(VIII) catalyzes the reaction intramolecularly via redox cycle of Os(VIII)/Os(VI).
Zinc Bismuthate Zn(BiO3)2. I. A Useful Oxidizing Agent for the Efficient Oxidation of Organic Compounds
Authors: Firouzabadi Habib , Mohammadpour-Baltork Iraj 
Published: July 2006

Abstract
Zinc bismuthate is an easily prepared and a stable compound. It could be used as an oxidant in organic solvents under aprotic or in the presence of a catalytic amount of a protic solvent. Primary and secondary saturated, allylic, and benzylic alcohols are converted to their carbonyl compounds in high yields. Mildness of the reagent is shown by the oxidation of thiols to their disulfides in excellent yields. Thioethers are also oxidized to their corresponding sulfoxides in good yields.
Structure and Orientation of o-Phenylene Phosphorochloridite and o-Phenylene Phosphorochloridate Dissolved in a Nematic Phase
Authors: Saito Koji , Yoshino Akihiro , Yoshida Tadayoshi , Takahashi Kensuke 
Published: July 2006

Abstract
The 1H and 31P NMR spectra of the title compounds dissolved in a nematic phase of N-(p-ethoxybenzylidene)-p-butylaniline (EBBA) were analyzed, and the structures of the proton and phosphorus skeleton determined.
Effects of Surface Pretreatments of a Glass Substrate on the Properties of Tin Oxide Film Prepared by Plasma-Assisted Chemical Vapor Deposition
Authors: Arai Masahiko , Hamada Satoshi , Nishiyama Yoshiyuki 
Published: July 2006

Abstract
A glass substrate was modified by thermal and chemical treatments with a fluoride solution and molten potassium salt. These surface treatments were found to affect both the electroconductive and optical properties of tin oxide film prepared by plasma-assisted chemical vapor deposition.
Magnetic Properties of Pyro-Carbons Prepared from Poly(vinyl chloride) and Activated Carbon
Authors: Murata Kazuhisa , Ushijima Hirobumi , Ueda Hisashi , Kawaguchi Kenji 
Published: July 2006

Abstract
The magnetic properties of pyro-carbons prepared from poly(vinyl chloride) and activated carbon were examined. In contrast with the observation of a hysteresis from vibrating sample magnetometer measurement, the ESR spectra showed only an usual Δms = ±1 signal. The temperature dependence of the magnetic susceptibility approximately obeys Curie’s law: The estimated spin density is ca. 1019 spins/g, roughly close to that calculated from ESR method. Therefore, it seems likely that the bulk magnetic nature of PVC/C sample is still paramagnetic, although there is a possibility that local microregions having anomalous high spin character could be formed in the sample.
Orientation of the Addition of Dimethyl Phosphonate to 5,6-Dideoxy-6-nitro-d-hex-5-enofuranoses
Authors: Hanaya Tadashi , Yamamoto Hiroshi , Yamamoto Hiroshi 
Published: July 2006

Abstract
The addition of dimethyl phosphonate to six 5,6-dideoxy-6-nitro-d-hex-5-enofuranoses at 25 °C in the presence of triethylamine preponderantly gave (5R)-adducts, whereas the same reaction at 100 °C without a base yielded (5S)-adducts as the main products.
First Synthesis and Deodorant Activities of Compounds Isolated from Thyme (Thymus Vulgaris L.) and Their Analogues
Authors: Miura Yozo , Yamaguchi Fumihiko , Ogo Yoshiaki 
Published: July 2006

Abstract
4-(4-Hydroxy-5-isopropyl-2-methylphenyl)-6-isopropyl-3-methyl-3,5-cyclohexadiene-1,2-dione and 5,5′-diisopropyl-2,2′-dimethyl-3,4,4′-biphenyltriol, isolated from thyme, and their analogues, 4-(2,5-dimethyl-4-hydroxyphenyl)-3,6-dimethyl-3,5-cyclohexadiene-1,2-dione and 2,2′,5,5′-tetramethylbiphenyl-3,4,4′-triol, have been synthesized and their deodorant activities against methanethiol measured.
Hydrogenation and Isomerization of Disodium Maleate in the Solid Phase over Fine Nickel Powder
Authors: Harada Tadao , Osawa Tsutomu 
Published: July 2006

Abstract
Disodium maleate was converted to a mixture of disodium maleate, fumarate, and succinate in the solid phase when particles of the starting material were kept in contact with fine nickel powder pretreated with hydrogen gas at 200 °C.
A Precise Calorimetric Study of 18-Crown-6 Complexes with Sodium, Potassium, Rubidium, Caesium, and Ammonium Ions in Aqueous Solution
Authors: Ozutsumi Kazuhiko , Ishiguro Shin-ichi 
Published: July 2006

Abstract
The complexation of 1,4,7,10,13,16-hexaoxacyclooctadecane (18-crown-6) with sodium, potassium, rubidium, caesium, and ammonium ions has been studied by precise titration calorimetry in aqueous solution containing 0.1 mol dm−3 (C2H5)4NCl as a constant ionic medium at 25 °C. The calorimetric data were well explained in terms of the formation of the [M(18-crown-6)]+ (M = Na+, K+, Rb+, Cs+, and NH4+) complexes, and their formation constants, enthalpies, and entropies were determined. The thermodynamic parameters of the complexes thus obtained are discussed in relation to their structures in solution.
7-Epidenticulatolide, a New Cembranolide with a Cyclic Peroxide Function from the Soft Coral Lobophytum denticulatum
Authors: Uchio Yasuto , Eguchi Shizuko , Fukazawa Yoshimasa , Kodama Mitsuaki 
Published: July 2006

Abstract
A new cembranolide diterpene, 7-epidenticulatolide, was isolated from a soft coral, Lobophytum denticulatum. The structute was deduced spectroscopically and determined by X-ray crystallography.
Reaction of Cyclic Polysulfides. Oxidation of 6b,9a-Dihydroacenaphtho[1,2-d][1,2,3]trithiole
Authors: Satoh Shin-ichi , Sato Ryu 
Published: July 2006

Abstract
The treatment of 6b,9a-dihydroacenaphtho[1,2-d][1,2,3]trithiole with 1 equiv of m-chloroperbenzoic acid (mCPBA) affords the corresponding oxidized product, 6b,9a-dihydroacenaphtho[1,2-d][1,2,3]trithiole 7-oxide, as the sole product in 88% yield, whereas the oxidation using N-halosuccinimide gives 6b,9a-dihydroacenaphtho[1,2-d][1,2,3]trithiole 7,7-dioxide via 6b,9a-dihydroacenaphtho[1,2-d][1,2,3]trithiole 7-oxide. Moreover, the reaction with chloramine T gives a 1,3,2-dithiazolidine derivative in satisfactory yield.
DDQ Oxidation of 6- or 8-Allyl-7-hydroxycoumarins. A New Synthesis of Benzodipyrandiones and Furobenzopyranones
Authors: Prashant Avula , Krupadanam Gazula Levi David , Srimannarayana Gutety 
Published: July 2006

Abstract
A novel synthesis of 2H,8H-benzo[1,2-b:3,4-b′]dipyran-2,8-diones, 2H,8H-benzo[1,2-b:5,4-b′]dipyran-2,8-diones, 2H-furo[2,3-h][1]benzopyran-2-ones, and 7H-furo[3,2-g][1]benzopyran-7-ones was achieved by developing 2-pyrone and furan ring over coumarin. 6- or 8-Ally-7-hydroxycoumarins on oxidation with 2,3-dichloro-5,6-dicyanobenzoquinone (DDQ) afforded benzodipyrandiones and furobenzopyranones. The structures of the compounds now synthesized were established by analytical, spectral, and comparison with authentic samples prepared by the known procedures.
A Comment on the Vibrational Assignment of the CN(4II) in “Pressure-Dependent Intensity Anomalies in the B2Σ+∼4II Perturbed Rotational Lines of the CN(B2Σ+–X2Σ+) 14-14 Band”
Authors: Kanda Kazuhiro , Ito Haruhiko , Suzuki Kaoru , Kondow Tamotsu , Kuchitsu Kozo 
Published: July 2006

Abstract
No Abstract
Unique Molecular Structures of Tungsten Phenoxides
Authors: Kanehisa Nobuko , Kai Yasushi , Kasai Nobutami , Yasuda Hajime , Nakayama Yuushou , Nakamura Akira 
Published: July 2006

Abstract
As a series of structural chemistry of early transition metal-phenoxides, the molecular structures of WCl5[2,6-(CH3)2C6H3O] (1) and WCl4[2,6-(CH3)2C6H3O]2 (2) have been determined by an X-ray diffraction method. Crystal data: 1; orthorhombic, space group Cmcm, a = 7.979 (3), b = 17.094 (4), c = 12.536 (2) Å, V = 1709.7 (8) Å3, Z = 4, Dc = 2.412 g cm−3, 2; monoclinic, space group C2/m, a = 17.615 (4), b = 7.188 (2), c = 8.396 (2) Å, β = 119.93 (2)°, V = 921.3 (4) Å3, Z = 2, Dc = 2.047 g cm−3. Complexes 1 and 2 have a molecular symmetry of C2v (mm) and C2h (2/m), respectively; the W–O–C(phenoxy) angles are 180° in 1 and 179° in 2. These are the first examples with a straight W–O–C(phenoxy) bond. By retrieval from the Cambridge Crystallographic Database the W–O–C(phenoxy) angles have been revealed to cover a wide range of 117–180°, which correlated with the W–O distance in the hyperbolic mode.
Kinetic Study in Aqueous Solutions of Alcohols with Butyl Group by Ultrasonic Methods
Authors: Nishikawa Sadakatsu , Ueda Masayuki 
Published: July 2006

Abstract
The ultrasonic absorption coefficients in aqueous solutions of 3-methoxy-1-butanol and 1-methoxy-2-butanol have been measured in the frequency range from 8.5 to 220 MHz at 25 °C. One process associated with a single-relaxational ultrasonic absorption has been found in both solutions. From the concentration dependencies of the relaxation frequency and the amplitude of ultrasonic relaxation, the cause of the relaxation has been attributed to a perturbation of an equilibrium associated with interaction between the solute and the solvent. The rate and thermodynamic parameters have been determined for the reaction and the effect of the isomeric alcohols on water structure has been considered based on these parameters. As results, both alcohols have been found to act as a water structure promoter. The effect of the methoxyl group in the alcohol molecules on the water structure has been speculated to break the water hydrogen bonds, i.e. to act as a structure breaker for water. Also, the results for solutions of other isomers, 2-propoxyethanol and 3-ethoxy-1-propanol, and that of a similar structure, 2-allyloxyethanol, have been compared with those obtained in this study. The effects of substituents in alcohol molecules have been discussed in relation to the water structure. They have also been considered from a comparison with the hydrophobic ability of the alcohols estimated from the concentration dependence of the apparent molar compressibility, along with the result from an ethanol aqueous solution. Both estimations from ultrasonic absorption and compressibility have provided a consistent interpretation for the effects on the water structure. From these present results regarding ultrasonic absorption, it has been speculated that the large ultrasonic absorptions observed near critical points in some alcohol solutions are superimposed with the usual Debye type relaxations.
Mechanochemical Reaction of Calcium Alginate Hydrogel due to a Counterion Exchange
Authors: Baba Kazuhiko , Yonese Masakatsu , Kishimoto Hiroshi 
Published: July 2006

Abstract
Stress relaxations of calcium alginate hydrogel (CaAlg gel) rods induced by adding other counterions were investigated by measuring their tensile stresses. The stress decreased upon adding Ba2+ and H+, whereas it increased upon adding Pb2+. The relaxation time, equilibrium elastic modulus and spontaneous elastic modulus were obtained. The relaxation times were analyzed using a theory involving counterion diffusion accompanied by an ion-exchange reaction under the assumption that the rate-determing step is the diffusion of added counterions (M2+ and M+) in the gel. The relaxation time was found to be a function of the concentration and diffusivity of the added counterions, the radius of the gel rod, the concentration of carboxylate ions and the counterion-selectivity coefficient () of the alginate. By fitting the observed relaxation times with theoretical ones, the optimal values of a were obtained: = 100, = 20 and = 3 × 103. The rate-determing step of stree relaxation was confirmed to be the counterion diffusion process in CaAlg gel.
Crystal Structures and Magnetic Properties of Novel μ-Carboxylato-μ-Hydroxo-Bridged Binuclear Copper(II) Complexes with 1,10-Phenanthroline
Authors: Tokii Tadashi , Hamamura Naohiko , Nakashima Michio , Muto Yoneichiro 
Published: July 2006

Abstract
Novel μ-carboxylato-μ-hydroxo-bridged binuclear copper(II) complexes with 1,10-phenanthroline, [Cu2(OH)(RCOO)(phen)2]X2·H2O (where R = H, X = BF4 (1); R = CH3, X = NO3 (2); R = C2H5, X = NO3 (3)) were prepared and characterized by elemental analyses, electronic spectra, magnetic susceptibilities, and X-ray structure analysis. The magnetic susceptibility data conform to the usual dimer equation. The −2J values are −109 cm−1 for 1, −111 cm−1 for 2, and −109 cm−1 for 3, indicating that a strong ferromagnetic spin coupling exists in these complexes. The crystal structures of 2 and 3 were determined by the single-crystal X-ray diffraction method. The crystallographic data are: Compound 2, monoclinic, P21/n, a = 8.107 (10), b = 18.554 (9), c = 18.616 (7) Å, β = 99.14 (6)°, V = 2765 (6) Å3, Z = 4, R = 0.045 for 3274 observed unique reflections; compound 3, monoclinic, P21/n, a = 7.981 (10), b = 18.352 (8), c = 19.247 (8) Å, β = 97.98 (7)°, V = 2792 (4) Å3, Z = 4, R = 0.047 for 3220 reflections. These complexes have very novel roof-shaped binuclear units with dihedral angles (122.8° for 2 and 122.7 ° for 3) observed between two basal planes of CuO2N2. These small dihedral angles are mainly attributed to the strong ferromagnetic exchange interaction in the present complexes.