bluuebunny/crossref_metadata_2025_split huggingface dataset:
Preparation and Characterization of Some Co(III) Complexes Containing (1R,2R)-Dimethyl-1,2-cyclohexanediamine. Crystal Structure of (+)435-trans-[CoCl2(R,R-dmchxn)2]Cl·HCl·2H2O
Authors: Sato Mitsunobu , Yokoo Yasuhiko , Yashiro Morio , Yano Shigenobu , Yoshikawa Sadao , Kobayashi Kimiko , Sakurai Tosio 
Published: July 2006

Abstract
(−)546-trans-[Co(NO2)2(R,R-dmchxn)2]+ and (+)546-Λ-Co(CO3)(R,R-dmchxn)2]+, which had been newly prepared, reacted with concentrated HCl to give, respectively, (−)435-trans-(SSSS)-[CoCl2(R,R-dmchxn)2]+ and (+)435-trans-(SRRS)-[CoCl2(R,R-dmchxn)2]+ stereospecifically, where R,R-dmchxn=(1R,2R)-N,N′-dimethyl-1,2-cyclohexanediamine. The stereospecific formation of (+)546-Λ-[Co(CO3)(R,R-dmchxn)2]+ has been observed. The trans-dichloro complexes and their precursors have been characterized by elemental analysis and by electronic absorption, circular dichroism, 1H NMR, and 13C NMR spectroscopies. An X-ray crystal-structure determination was undertaken on one of the trans-dichloro isomers, (+)435-[CoCl2(R,R-dmchxn)2]Cl·HCl·2H2O, whose structure could not be characterized by usual spectroscopies. This complex forms triclinic crystals with a=11.395(10) Å, b=11.674(8) Å, c=11.031(8) Å, α=98.62(6)°, β=102.48(8)°, γ=118.24(5)°, and Z=2, in the space group P1. Least-squares refinements converged at an R value of 0.041 for 4870 independent reflections with Fo&gt;3[σ(Fo)]. The complex cation has an approximately twofold symmetry. The conformations of the two five-membered chelate rings are both λ. The arrangements of the groups around the two secondary nitrogen atoms are R and S in each diamine. The isomerization from the (+)435-trans-dichloro complex to the (−)435 isomer has been observed under mild basic conditions.
Oxidative Removal of N-(4-Methoxybenzyl) Group on 2,5-Piperazinediones with Cerium(IV) Diammonium Nitrate
Authors: Yamaura Masanori , Suzuki Tsuneji , Hashimoto Hironobu , Yoshimura Juji , Okamoto Thoru , Shin Chung-gi 
Published: July 2006

Abstract
It was shown that N-(4-methoxybenzyl) group on 2,5-piperazinediones can be oxidatively removed with cerium(IV) diammonium nitrate under mild conditions, and the oxidative removal was performed in some model compounds which have several functional groups.
The α-Chlorination of Aryl Ketones with Manganese(III) Acetate in the Presence of Chloride Ion
Authors: Tsuruta Takehiko , Harada Tetsuya , Nishino Hiroshi , Kurosawa Kazu 
Published: July 2006

Abstract
The reaction of 2-(4-methoxyphenyl)-4-chromanone with Mn(OAc)3 in the presence of LiCl gave 3,3-dichloro-2-(4-methoxyphenyl)-4-chromanone. The reactions of 2-phenyl-4-chromanone, 1-phenyl-1-propanone, 1,2-diphenylethanone, and 1-tetralone similarly yielded α,α-dichloro derivatives in good yields. 2,2,2-Trichloroacetophenones were obtained from 2,2-dichloroacetophenones, but in the absence of LiCl, 2,2-dichloroacetophenones gave 2,2,3,3-tetrachloro-1,4-butanediones. KCl, NaCl, NH4Cl, AlCl3, and CaCl2 were also employed as the Cl− ion source. Synthetic applicability and the reaction mechanisms are discussed briefly.
Pentoside Synthesis by Dehydrative Glycosylation. Synthesis of O-α-l-Arabinofuranosyl-(1→3)-O-β-d-xylopyranosyl-(1→4)-d-xylopyranose
Authors: Koto Shinkiti , Morishima Naohiko , Takenaka Kazuhiro , Uchida Chisa , Zen Shonosuke 
Published: July 2006

Abstract
O-α-l-Arabinofuranosyl-(1→3)-O-β-d-xylopyranosyl-(1→4)-d-xylopyranose isolated from the hydrolyzate of corncobs arabinoxylan was synthesized by way of dehydrative glycosylation.
Brillouin Scattering of Supercooled Liquids. I. Tri-o-tolyl Phosphate
Authors: Koda Shinobu , Nomura Hiroyasu , Nakamura Masayuki , Miyahara Yutaka 
Published: July 2006

Abstract
The sound velocities of tri-o-tolyl phosphate in the GHz region were measured by means of the Brillouin scattering method over a wide range of temperatures. In the temperature range from 283 to 313 K, the sound velocity dispersion was observed directly. The relaxation curves of the longitudinal modulus could be analyzed using a B.E.L. model with a parameter of K=0.5. With a rising temperature, a deviation from the B.E.L. model appeared. We considered that the deviation was attributed to the rotational molecular motion of tri-o-tolyl phosphate.
Effects of Addition of Vanadium to Alumina-supported Ruthenium Catalyst on Adsorption and Hydrogenation of Carbon Monoxide
Authors: Enomoto Toshiyuki , Okuhara Toshio , Misono Makoto 
Published: July 2006

Abstract
The hydrogenation of carbon monoxide to hydrocarbons (Fischer-Tropsch synthesis) was studied over RU/Al2O3 catalysts to which transition metals such as V, Cr, Mn, and Ag were added. Among these additives, V was most effective for the suppression of methane formation, without changing the olefin/paraffin ratio and the propagation probability. The catalytic activity decreased and the infrared band of adsorbed carbon monoxide shifted only slightly upon the V addition, showing little change in the electronic state of Ru. The particle size of the Ru remained almost unchanged, although the degree of hydrogen adsorption decreased to half. This indicates that Ru particles were partially covered by V (or an oxide of V). The effect on the turnover frequency of hydrogenation of CO was compared with those for the hydrogenation of benzene, and the hydrogenolysis of ethane. These effects were found to be very similar to an ensemble effect reported for Ru–Cu/SiO2 catalysts. On the basis of these results, it is concluded that the addition of V brought about an effect similar to the ensemble effect.
Hexacarbonylmolybdenum-induced Reaction of Isoxazoles. Cycloaddition of Isoxazoles with Acetylenic Esters and Related Reactions
Authors: Kobayashi Tomoshige , Nitta Makoto 
Published: July 2006

Abstract
In the presence of hexacarbonylmolybdenum, substituted isoxazoles undergo a cycloaddition reaction with dimethyl acetylenedicarboxylate across the C-4–C-5 bond to give 3,4-bis(methoxycarbonyl)pyridine derivatives. In a similar cycloadition of isoxazoles with methyl propiolate, 4-(methoxycarbonyl)pyridine derivatives were also obtained. The β-carbon atom of methyl propiolate could intervene in the bonding with the C-5 position of the isoxazoles regioselectively. A mechanism involving a complexed 2-oxa-3-azabicyclo[3.2.0]hepta-3,6-diene derivative and the subsequent N–O and C-1–C-5 bond cleavage leading to a complexed (β-keto vinyl)nitrene intermediate is proposed for the formation of pyridine derivatives. In order to clarify the mechanistic aspect, the reaction of 4-phenyl-2-oxa-3-azabicyclo[3.2.0]hepta-3,6-diene and its related compounds were also studied to give pyridine derivatives.
The Co-amination of Phenol and Cyclohexanol with Palladium-on-carbon Catalyst in the Liquid Phase. An Application of a Hydrogen-transfer Reaction
Authors: Hamada Hideaki , Yamamoto Makoto , Kuwahara Yasushi , Matsuzaki Takehiko , Wakabayashi Katsuhiko 
Published: July 2006

Abstract
Phenol and Cyclohexanol are simultaneously aminated to aniline and cyclohexylamine by ammonolysis with the palladium-on-carbon catalyst in the liquid phase, although the amination of either phenol or cyclohexanol hardly occurs without the other. In contrast, carbon-supported ruthenium, rhodium, and platinum catalysts are ineffective for this co-amination; they are active only for the amination of cyclohexanol to cyclohexylamine. These results are explained by the specific activity of palladium for hydrogen transfer between phenol and cyclohexanol.
Selective Hydrogenation of Conjugated Dienes Catalyzed by Thiocyanatotris(triphenylphosphine)cobalt(I)
Authors: Nakayama Taisei , Kanai Hiroyoshi 
Published: July 2006

Abstract
Thiocyanatotris(triphenylphosphine)cobalt(I) prepared in situ from bis(thiocyanato)bis(triphenylphosphine)cobalt(II), triphenylphosphine, zinc bromide, selectively hydrogenated conjugated dienes to the corresponding cis-monomenes. The C2-or/and C3-methyl substituted 1,3-butadienes enhance the reactivity by a factor of 2.3 per one methyl group, while C1- or/and C4-methyl substituted 1,3-butadienes lower the reactivity by a factor of 1/23 per one methyl group. In the hydrogenation of cyclic conjugated dienes α-angle (∠C–C=C) is closely related to the hydrogenation rate. The rates of hydrogenation in cyclic ethers are greater than those in acyclic ethers, but the cis-selectivity in acyclic ethers is much higher. Deuterium selectively adds to 1,3-butadiene and 2,5-norbornadiene (bicyclo[2.2.1]hepta-2,5-diene) to give 3,4-dideuterio-1-butene and cis-1,4-dideuterio-2-butene, and endo,endo-5,6-dideuterionorbornene and endo,endo-3,5-dideuterionortricyclene, respectively. A mechanism is proposed which derives from anti-π-allylcobalt hydride or delocalized nortricyclenylcobalt hydride as an intermediate.
Syntheses of Diferrocenyl Trithiocarbonate and a Tetrathio-substituted Ethylene Derivatives of Ferrocene
Authors: Sato Masaru , Akabori Sadatoshi 
Published: July 2006

Abstract
Diferrocenyl trithiocarbonate, 1,3-dithia[3]ferrocenophane-2-thione, and 2,2′-bi(1,3-dithia[3]-ferrocenophan-2-ylidene) were prepared.
Effects of Uniaxial Pressure and Shear on the Electrical Conductivity of Solid. II. Electrical Conductivity in Some Amorphous Coordination Polymers
Authors: Kanda Seiichi , Ohkawa Kuwako , Yamashita Kenichi , Oda Nobuo , Chihara Hideaki 
Published: July 2006

Abstract
Three amorphous coordination polymers, R2dtoaCu, where R=CH3, C6H5CH2, or cyclohexyl and dtoa=(N,N′-disubstituted dithiooxamidato), were prepared and the effect of uniaxial pressure on their electrical resistivities in the direction of the external pressure was measured. Application of the pressure up to 6×108 Pa caused an increase in the resistivity but, before reaching the equilibrium state, the resistivity exhibited a complicated time variation, which was not completely reversible upon pressure release as far as the measurement could trace. The results were explained on the basis of a model in which at least two competing processes occur. One of the processes is assumed to be reorientation of the two-dimensional network of molecules perpendicular to the applied pressure, which is a slow process and takes as long as hundreds of hours to reach the equilibrium. Activation energies of various processes were derived.
Tetraalkylammonium Ion-selective Electrodes with Supporting Electrolytes. An Experimental Test of the Theory of Liquid Ion-exchange Membrane Ion-selective Electrodes Based on the Concept of the Mixed Ion-transfer Potential
Authors: Kakiuchi Takashi , Obi Ichiro , Senda Mitsugi 
Published: July 2006

Abstract
Selectivity characteristics of liquid-membrane ion-selective electrodes for tetraethylammonium and triethylmethylammonium ion-selective electrodes in the presence of homologous tetraalkylammonium ions as interfering ions were studied with supporting electrolytes both in the liquid membrane and in the sample solution. The emf vs. logarithm of the concentration of the primary ion curves in the presence of interfering ion were well described by the theory of liquid-membrane ion-selective electrodes which is based on the concept of the mixed ion-transfer potential at the liquid-membrane/sample solution interface. The dependence of the selectivity coefficients on the concentrations of the primary ion in the liquid membrane and of the interfering ion in the sample solution agreed well with the theoretical prediction.
An X-Ray Diffraction Study on the Structures of Mono(glycinato)zinc(II) and Tris(glycinato)zincate(II) Complexes in Aqueous Solution
Authors: Ozutsumi Kazuhiko , Ohtaki Hitoshi 
Published: July 2006

Abstract
The structure of zinc(II) complexes with glycinate ion in solution was investigated by the X-ray diffraction method. The measurements were performed at 20 °C for the solutions with the Cgly⁄Czn mole ratios of 1.49 (solution A) and 5.09 (solution B), where Ci denotes the total concentration of species i. From the analysis of the radial distribution curve of solution A, in which comparable amounts of the hexaaqua- and mono(glycinato)zinc(II) complexes existed, it was found that the mono(glycinato)zinc(II) complex combined with four water molecules at the distance of (2.12±0.01) Å. The Zn–OH2 bond length within the complex was longer than that within the hexaaquazinc(II) ion (2.08 Å). The Zn–O and Zn–N distances, where O and N denote oxygen and nitrogen atoms within the glyeinate ion in the [Zn(gly)(OH2)4]+ complex, were both (2.12±0.02) Å. Thus the mono(glycinato)zinc(II) complex had a regular octahedral structure. The nonbonding Zn···C distance was found to be (2.84±0.02) Å. The X-ray diffraction data of solution B, which contained the [Zn(gly)3]− ion as a predominant species, showed that the tris(glycinato)zincate(II) complex had a regular octahedral structure with the both Zn–O and Zn–N bond distances of (2.12±0.01) Å. The nonbonding Zn···C(COO), Zn···C(CH2), and Zn···O(O=C) lengths were (2.87±0.03) Å, (2.93±0.03) Å, and (4.10±0.04) Å, respectively. The solubility of the bis(glycinato)zinc(II) complex was so low that the structural determination of the complex by the present X-ray diffraction method was not possible.
Conformational Aspect of Indazole Adenine Dinucleotides in Aqueous Solution
Authors: Tono-oka Shuichi , Azuma Ichiro , Sekikawa Isao 
Published: July 2006

Abstract
Conformational properties of various title compounds in aqueous solution were examined with the aid of 500 MHz 1H-NMR spectroscopy. In particular, the signals of aromatic protons on both the indazole and adenine rings were shifted to higher fields without exception, compared with the corresponding signals in indazole and adenine mononucleotides. These observations, which can be explained as resulting from diamagnetic shielding effect of the indazole and adenine rings, indicate that the base pairs in the dinucleotides are closely stacked in parallel planes. On the other hand, the average conformation of riboses were deduced from J1′,2′-values as a proportion of N\ightleftarrowsS equilibrium composition. Indazole riboses showed a roughly 50/50 equilibrium, whereas adenine riboses showed a small preference for the N-type conformer. Such a conformational state may be indispensable for taking up the strongly folded conformation between the base pairs in the dinucleotides, as judged by a somewhat favored S-type conformation of both riboses in the indazole- and adenine mononucleotides.
An Improved Preparation of the p-Tropoquinone Mono- and Diacetals by Thallium(III) Nitrate Oxidation of 2-Alkoxy-5-hydroxytropones
Authors: Takeshita Hitoshi , Mori Akira , Isayama Yasutoshi 
Published: July 2006

Abstract
The thallium(III) nitrate-oxidation of 2-alkoxy-5-hydroxytropones gave, in good yields, the mono- and diacetals of tropoquinones, which can be used for the introduction of oxygen functions to the seven-membered nucleus and preparation of the substituted tropoquinones. An improved synthesis of 4-methyl-p-tropoquinone or 4-methoxy-p-tropoquinone was accomplished.
Efficient Additions of an Electronically Stabilized Persistent Aminyl Radical to Conjugated Alkenes
Authors: Miura Yozo , Kunishi Teruo , Kinoshita Masayoshi 
Published: July 2006

Abstract
It has been found that an electronically stabilized persistent N-(4-chlorophenylthio)-3,5-di-t-butylphenylaminyl radical (1) adds to conjugated alkenes to afford 1 : 2 adducts of the alkenes and 1 in fair to excellent yields, along with small amounts of 1 : 1 adducts of the alkenes and 1.
Aggregation Behavior of Amphiphiles Functionalized with Dipeptide Segments and Enantioselective Ester Hydrolysis in Their Bilayer Membranes
Authors: Murakami Yukito , Nakano Akio , Ikeda Hidetsugu , Imori Toru , Akiyoshi Kazunari 
Published: July 2006

Abstract
Four amphiphiles having dipeptide segments, which consist of one histidyl residue and another amino acid residue, and the dihexadecyl moiety for the double-chain segment (N+C5AlaHis2C16, N+C5LeuHis2C16, N+C5PheHis2C16, and N+C5HisAla2C16) were synthesized, and the aggregate morphology of them was characterized by electron microscopy and differential scanning calorimetry. The amphiphiles, which have the histidyl residue bound to the dihexadecylamine component (N+C5AlaHis2C16, N+C5LeuHis2C16, N+C5PheHis2C16) formed both multi- and single-walled aggregates in the aqueous dispersion state, while their sonicated solutions involved only single-walled vesicles. On the other hand, the amphiphile, which has the alanyl residue bound to the dihexadecylamine component (N+C5HisAla2C16) afforded tubular aggregates in the aqueous dispersion. The hydrolysis of enantiomeric esters of various hydrophobic nature, which was carried out in the single-walled vesicles, showed relatively small enantioselectivity. The reasons for such catalytic performance of the vesicles were discussed from the kinetic and mechanistic viewpoints; the kinetic analysis being carried out on the basis of the organic pseudo-phase concept.
Syntheses of Benzilic Acids through Electrochemical Reductive Carboxylation of Benzophenones in the Presence of Carbon Dioxide
Authors: Ikeda Yoshikazu , Manda Eiichiro 
Published: July 2006

Abstract
Reaction conditions for the electrochemical synthesis of benzilic acid (2a) under the atmosphere of carbon dioxide was investigated from the preparative points of view. The highest yield of 2a (86%) was obtained under the following conditions; cathode: mercury, electricity passed: 2.3 F/mol, constant current density: 2.5 mA/cm2, benzophenone (1a) (8.2×10−3mol), electrolyte(KI, 1.7×10−2mol) in DMF (50 ml). This method and conditions were applied to the syntheses of twelve benzilic acids (2b–2m) and yielded acids in the range of 10–92%. The yields were strongly depended on the electronic effect of substituents and benzilic acids were not obtained when the ring substituent was NO2, OH, or Br group.
Effective Cleavage of 7-Alkoxytricyclo[6.4.0.02,7]dodecan-3-one System
Authors: Kojima Tsutomu , Inouye Yoshinobu , Kakisawa Hiroshi 
Published: July 2006

Abstract
Several effective methods for the cleavage of the cyclobutane ring in 7-alkoxytricyclo[6.4.0.02,7]dodecan-3-one system are described. These involve reactions with hydriodic acid, with trimethylsilyl trifluoromethanesulfonate, and with KOH in H2O–DMSO via a lactone derivative.
Dialkylcarbamato Complexes of Ni(II), Zn(II), and Cd(II)–Tetraazacycloalkanes Obtained from CO2-Uptake, and X-Ray Structure of (Diethylcarbamato)((7RS,14RS)5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraaza-cyclotetradecane)nickel(II) Perchlorate
Authors: Ito Haruko , Ito Tasuku 
Published: July 2006

Abstract
Nickel(II), zinc(II), and cadmium(II) complexes of certain tetraazacycloalkanes (L), [M(L)](ClO4)2, take up CO2 as R2NCO2− to give carbamato complexes, [M(O2CNR2)(L)]+, where L=(7RS,14RS)-5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane (L1) for M=Ni2+, and L=1,4,8,11-tetramethyl-1,4,8,11-tetraazacyclotetradecane (L2) for M=Ni2+, Zn2+, and Cd2+. The resulting complexes have been characterized by means of IR, and NMR or electronic spectroscopy. X-Ray analysis of [Ni(O2CN(C2H5)2)(L1)]ClO4 (monoclinic C2/c, a=15.842(3), b=13.675(3), c=13.753(2) Å, β=109.94(1)°) shows that it is a discrete six-coordinate complex with cis-NiO2N4 geometry, and the carbamato ligand is bidentate. Desired carbamato complexes were hardly obtained with [M(L)]2+ containing tetraaza macrocyclic ligand which favors square-planar coordination. All the data indicate that carbamate ions chelate the metals, and thus use of tetraazacycloalkanes which fold readily is essential for this type of CO2 uptake.
Infrared Spectrum of Dichloroborane Produced by CO2 Laser Enhanced Reaction
Authors: Lee Kuk-Haeng , Takeo Harutoshi , Kondo Shigeo , Matsumura Chi 
Published: July 2006

Abstract
Infrared spectra of HBCl2 and DBCl2 produced by a TEA CO2 laser enhanced reaction of BCl3 and H2/D2 have been observed by an FT-IR spectrometer at a resolution of 0.12 cm−1. A detailed analysis has been carried out for the ν1 band of HBCl2 to obtain the precise molecular parameters, and they are compared with the microwave data. The fundamental frequencies other than the ν3 band have all been determined. These frequency data combined with the results of an ab initio MO calculation have yielded the general symmetry force field through a least squares method. Some characteristic features on the CO2 laser reaction of BCl3 and H2 are also discussed.
Synthetic Studies of Rifamycins. VII. A Facile Synthesis of the Aromatic Chromophore of Rifamycin S through a Rifamycin W Aromatic Segment
Authors: Nakata Masaya , Wada Shigeru , Tatsuta Kuniaki , Kinoshita Mitsuhiro 
Published: July 2006

Abstract
The intact aromatic chromophore of rifamycin S, 7-amino-2,5-dihydroxy-2,4-dimethyl-naphtho[2,1-b]furan-1,6,9(2H)-trione, was synthesized through the rifamycin W aromatic segment, 1-[5,8-dimethoxy-2,4-bis(methoxymethoxy)-3-methyl-6-nitro-1-naphthyl]-1-propanone which was prepared in 9 steps and 29.6% overall yield from 2,6-bis(benzyloxy)-3,5-dibromotoluene and furan.
Synthesis of 5-(Substituted Styryl)-2-aminotropones
Authors: Imafuku Kimiaki , Kobayashi Toshio , Matsumura Hisashi 
Published: July 2006

Abstract
The methylation of 4-styryltropolones with diazomethane afforded 2-methoxy-4-styryltropones (2a–g) and 2-methoxy-6-styryltropones. The reactions of 2a–g with hydrazine gave 2-hydrazino derivatives, which were converted to 2-chloro derivatives 5a–g. Ammonolysis of 5a–g afforded 2-amino-5-styryltropones (7a–g) by ciné substitution reaction. The compounds 7a–g were hydrolyzed to give the corresponding 5-styryltro-polones. Some interesting by-products were also found in these synthetic processes.
Synthetic Inorganic Ion-exchange Materials. XXXX. Ion Exchange Properties of Tin(IV) Antimonate for Alkaline Earth and Transition Metal Ions and Its Application to Metal Separations
Authors: Abe Mitsuo , Furuki Noboru 
Published: July 2006

Abstract
Ion-exchange selectivities of alkaline earth and transition metal ions on tin(IV) antimonate cation exchanger were investigated in nitric acid media. The selectivity sequences were found to be; Mg2+&lt;Ca2+&lt;Sr2+&lt;Ba2+ for alkaline earth metal ions and Ni2+&lt;Mn2+&lt;Cd2+&lt;Co2+&lt;Cu2+&lt;Zn2+ for transition metal ions. The separation factors for neighboring pairs on the exchanger gave larger values than those on the ion-exchange resin of a strong acid type. The effective separations of Mg2+–Ca2+, Sr2+–Ba2+, and Na+–Cs+, Sr2+ have been achieved with a small column (5cm×0.5 cm i.d.).
Phosphorescence from Biacetyl and Benzophenone Surfaces by Collision with the T1 State of Benzene
Authors: Ohshima Shigeru , Kondow Tamotsu , Kuchitsu Kozo 
Published: July 2006

Abstract
Benzene molecules in the lowest-excited triplet state, T1, were allowed to collide with biacetyl and benzophenone surfaces, and phosphorescence from the surface due to energy transfer from the T1 state of benzene was observed. The possibility of application of this method to detection of metastable species is discussed.
Synthesis and Magnetism of Trinuclear Copper(II) Complexes with a Salen-like Schiff Base and a Tertiary Diamine
Authors: Handa Makoto , Okawa Hisashi , Kida Sigeo 
Published: July 2006

Abstract
Trinuclear Copper(II) complexes [{Cu(sb)}2Cu(da)](ClO4)2 have been synthesized by the use of a copper(II) complex with a salen analog ([Cu(sb)]) and a diamine (da) such as bpy or phen. Cryomagnetic investigations revealed the operation of an antiferromagnetic spin-exchange interaction (–J=26–78 cm−1) between the adjacent copper ions.
Behavior of Trifluoroacetohydrazonoyl Bromide in Basic Media
Authors: Tanaka Kiyoshi , Maeno Seiji , Mitsuhashi Keiryo 
Published: July 2006

Abstract
The bromide 1 was treated with sodium methoxide or phenoxide to give exclusively the corresponding substituted product. The predominant formation of the substituted products was also recognized with regard to various amines. However, the reaction with triethylamine proceeded more complicatedly to give the products via reduction process together with a trace amount of the dimer of N-phenyl-C-(trifluoromethyl)nitrilimine.