bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Dechlorination of Polychlorinated Biphenyls by UV-irradiation. IX. Reactions of Monochlorobiphenyls in a 2-Propanol Solution
Authors: Nishiwaki Tohru , Shinoda Tsutomu , Anda Kinji , Hida Mitsuhiko 
Published: July 2006

Abstract
The multiplicity of the photo-excited state responsible for the dechlorination reaction of monochlorobiphenyls was determined in 2-propanol. Linear Stern-Volmer plots were obtained by the use of 1,3-cyclohexadiene for the dechlorination reactions of 2- and 3-chlorobiphenyl; the slopes were 35.7 and 11.0 dm3 mol−1 respectively. Fluorescence emissions were also quenched, and the quenching constants for 2- and 3-chlorobiphenyls were in accord with the respective values of the slope obtained from the Stern-Volmer plot for the reaction. The reaction of 4-chlorobiphenyl was quenched by cis-1,3-pentadiene, but was accelerated by 1,3-cyclohexadiene. Photosensitized dechlorinations of monochlorobiphenyls took place with several ketones, such as acetone and acetophenonc. These sensitized reactions were, however, very inefficient compared with the reactions in the direct excitations, except in the case of 4-chlorobiphenyl. It was, then, concluded that the dechlorinations of 2- and 3-chlorobiphenyl occurred only from the excited singlet state, while that of 4-chlorobiphenyl took place predominantly from the excited triplet state.
The Isolation and Structures of Novel Neolignans and Neosesquilignans from Heterotropa takaoi M.
Authors: Yamamura Shosuke , Niwa Masatake , Terada Yukimasa , Nonoyama Mikie 
Published: July 2006

Abstract
Several novel neolignans and neosesquilignans represented by heterotropanone and heterotropatrione, respectively, have been isolated from the plant Heterotropa takaoi M. and their structures also been elucidated on the basis of their spectral data closely related to that of asatone. From a biogenetic point of view, furthermore, these neolignans and neosesquilignans were chemically correlated to one another.
Intramolecular Stacking Association of Three Dinucleoside Monophosphates Containing Naturally-occurring 1-Methyladenosine Residue(s): m1ApA, Apm1A, and m1Apm1A
Authors: Takeuchi Yasuhiro , Tazawa Ichiro , Inoue Yasuo 
Published: July 2006

Abstract
Three modified dinucleoside monophosphates containing naturally-occurring 1-methyladenosine residue, m1ApA, Apm1, and m1Apm1A, were prepared. Intramolecular stacking association properties of these dimers were studied quantitatively using two independent methods. Thermal denaturation and acid-base titration experiments reached to the same conclusion that both m1\overset+ApA and Apm1\overset+A were less stacked than ApA. Acidbase titration experiment also showed that the three modified dimers, in their neutral forms, were stacked to almost the same extent as ApA. These results indicate the N-1 methylation of an adenine base does not enhance stacking interaction of dimers, in sharp contrast to the N6 methylation of the same base. UV hypochromicity and CD measurements were also made for the three dimers, and the results were found to be consistent with those of the stacking quotient determination.
A Comparative Study of the Kinetics and Mechanism of Reactions between Copper(I) Iodide and Mercury(II) Halides in Solid State
Authors: Beg Mirza Aijaz , Ahmad Afaq 
Published: July 2006

Abstract
Kinetics and mechanisms of reactions of HgI2, HgBrI, or HgBr2 with CuI were studied in the solid state. Mercury(II) halides react via vapor phase, and reactions proceed through counter diffusion of Cu+ and Hg2+. X-Ray and chemical analyses indicate that powdered Cul gives Cu2HgI4 when mixed with HgI2 and a mixture of Cu2HgI4 and CuBr when mixed with HgBrI. CuI and HgBr2 react differently in different molar ratios. In a 1:2 molar ratio mixture of CuI and HgBr2, a new product CuHgBr3 and HgBrI are obtained. Data for lateral diffusion best fit the equation Xn=kt where X is the thickness of product layer at time t, and n and k are const. Formation of solid solutions among reactant and product phases is also noted.
Electron Transfer Reactions between V(IV) and I(V) Catalyzed by Os(VIII) or Ru(III). A Kinetic Study
Authors: Radhakrishnamurti Patapati Subbu , Janardhana Chelli , Mohanty Gopal Krishna 
Published: July 2006

Abstract
Oxidation of V(IV) by iodate, catalyzed by Os(VIII) or Ru(III) in aq perchloric acid medium, was carried out. The order with respect to oxidant is zero in both the Os(VIII)- and Ru(III)-catalyzed reactions. A unit-order dependence on V(IV) is observed in the case of Os(VIII)-catalyzed reaction and a fractional dependence on V(IV) is noticed in the case of Ru(III)-catalyzed reaction. Both Os(VIII)- and Ru(III)-catalyzed reactions exhibit an inverse unit dependence on acidity. Insensitivity to change in the dielectric constant of medium is observed in both the systems. Effects of salt and ionic strength were studied. A plausible mechanism consistent with the experimental results is postulated, rate laws being derived from the proposed mechanism. The stoichiometry of the reaction has proved to be the same for both the systems.
Synthesis and Characterization of Tin(IV) Thiocarbamates
Authors: Gupta Virendra Kumar , Kanjolia Ravindra Kumar , Gupta Vishnu Deo 
Published: July 2006

Abstract
Tin(IV) thiocarbamates of the types SnX4−n(SOCNR2)n, n-BuSnCl3−n(SOCNEt2)n, and R′2Sn(SOCNEt2)n (where X=Cl, Br, I; R=Me, Et; R′=n-Bu, n-Pr; n=1–4) were synthesized and characterized by elemental analysis and by molar conductance, molecular weight, and IR and NMR measurements.
Photochemical Charging of a Silver Electrode Fixed at a Titanium Dioxide Surface
Authors: Hada Hiroshi , Yonezawa Yoshiro , Momoki Yasuhito 
Published: July 2006

Abstract
A regenerative half cell presented here: TiO2(Ag)–Ag+ can be photochemically charged by irradiation of the TiO2 surface with sunlight. Electrical energy is extracted from it by connection through the load with a suitable half cell which has a more positive electrode potential than Ag–Ag+.
The Formation of Acetylcatechol in the Photochemical Reaction of o-Benzoquinones with Acetaldehyde
Authors: Takuwa Akio , Iwamoto Hidetoshi , Soga Osamu , Maruyama Kazuhiro 
Published: July 2006

Abstract
The irradiation of several alkyl-substituted o-benzoquinones in the presence of acetaldehyde gave the corresponding acetylcatechol and catechol monoacetates via the attack of the acetyl radical on the ground-state quinone molecule. In the reaction of 3,5-di-t-butyl- and 3-t-butyl-5-methyl-o-benzoquinones, the dimer of alkyl-substituted cyclopentadienone, generated by the photodecarbonylation of the quinones, was also obtained.
Reaction of Arenediazonium Salts with Nitriles in the Presence of Sodium Carboxylates. A Convenient Synthesis of Unsymmetrical N-Aryl Acyclic Imides
Authors: Kikukawa Kiyoshi , Kono Kiyoshi , Wada Fumio , Matsuda Tsutomu 
Published: July 2006

Abstract
Reactions of arenediazonium tetrafluoroborates (ArN2BF4), acetonitrile and sodium carboxylates (RCOONa) gave N-acyl acetanilides (ArN(COR)COCH3) in moderate to good yields (Ar=Ph, 2-MeC6H4, 3-MeC6H4, 4-MeC6H4, 2,6-(Me)2C6H3; R=Et, i-Pr, t-Bu, Ph). Acrylonitrile and benzonitrile could be used in the reaction instead of acetonitrile.
Interaction of Amylose with Iodine. II. Kinetic Studies of the Complex Formation by the Temperature-jump Method
Authors: Yamamoto Masako , Sano Takayuki , Harada Shoji , Yasunaga Tatsuya 
Published: July 2006

Abstract
Kinetic studies of the amylose–iodine complex formation for the amylose of degree of the polymerization (DP) of 32 were made using the temperature-jump method. The reciprocal relaxation time increases with increase of the concentration of iodine and decreases with that of amylose. Based on these results, the reaction, H0+3I3−\ightleftharpoonsH3 was proposed as a plausible mechanism for the relaxation phenomenon, where H0 denotes the free helical segment of amylose and H3 the helical segment containing three I3−. The relaxation phenomena were observed for the amyloses of DP 42, 57, and 76, and analyzed by the same mechanism as that proposed in the case of DP 32. The rate constants for the forward and the backward reactions (kf and kb) were determined: the kf value increases with DP of amylose and the kb value decreases. Examination of the relaxation time and the relaxation amplitude suggested that the relaxation phenomenon is not based on the whole process of the amylose–iodine complex formation but on the H3 complex formation reaction which was shown to be the nucleation process.
UV Photoelectron Spectroscopic Investigation and the DV-Xα MO Calculation of Tetrakis(2-methyl-2-propanethiolato)molybdenum(IV)
Authors: Takahashi Masao , Watanabe Iwao , Ikeda Shigero , Kamata Masato , Otsuka Sei 
Published: July 2006

Abstract
Helium(I) ultraviolet photoelectron spectrum is reported for the compound Mo(t-BuS)4. The observed spectrum is interpreted by means of DV-Xα MO calculations on the model compounds Mo(SH)4 and Mo(SMe)4. The UV photoelectron spectrum of Mo(t-BuS)4 exhibits a low ionization potential band (IP=6.43 eV) which corresponds to ionization of mainly Mo4dz2 electron of A1 representation. This molecular orbital has also bonding character between Mo4d and S3d.
Synthesis of A and B Rings Analog of Coleon B
Authors: Matsumoto Takashi , Iyo Koji , Miuchi Shigekazu 
Published: July 2006

Abstract
Catalytic hydrogenation of 19-norabieta-4(18),8,11,13-tetraen-3α-ol over Raney Ni and subsequent dehydration afforded 18-norabieta-2,8,11,13-tetraene, which was converted into 3α-bromo-18-norabieta-8,11,13-trien-2-one (8) via a bromohydrin. Acetalization of 8 with 1,2-ethanediol in the presence of p-toluenesulfonic acid afforded a mixture of 3α-bromo-2,2-ethylenedioxy-18-norabieta-8,11,13-triene (10) and its 3β-bromo isomer (11) in a ratio of ca. 2 : 3. Oxidation of 10 and 11 with chromium trioxide in acetic acid gave the corresponding ketones 12 and 13. The ketone 13 was then converted into a diosphenol derivative, 3β-bromo-2,2-ethylenedioxy-6-hydroxy-18-norabieta-5,8,11,13-tetraen-7-one (14), by treatment with oxygen in the presence of potassium t-butoxide. Hydrolysis of 14 with dilute hydrochloric acid followed by dehydrobromination afforded the desired analog, 6-hydroxy-19-norabieta-3,5,8,11,13-pentaene-2,7-dione. A related A/B ring oxygenated compound, 19-norabieta-3,5,8,11,13-pentaene-2,7-dione was also synthesized from 12 and 13 via the corresponding 6α-bromo derivatives.
Synthesis of 11,14-Diacetoxy-13-(acetoxymethyl)podocarpa-8,11,13-triene. Correction of Proposed Structure for Premnolal
Authors: Matsumoto Takashi , Imai Sachihiko , Yuki Shuhei 
Published: July 2006

Abstract
Oxidation of 11-acetoxyabieta-8,11,13-triene, derived from methyl 11-methoxyabieta-8,11,13-trien-18-oate, with chromium trioxide afforded 11,15-diacetoxyabieta-8,11,13-trien-7-one and 11-acetoxy-13-acetylpodocarpa-8,11,13-trien-7-one (11) in a ratio of ca. 2 : 1. The acetyl compound 11 was converted into a quinone, 13-(hydroxymethyl)podocarpa-8,12-diene-11,14-dione (18), by a series of reactions : iodoform reaction, esterification, acetylation, sodium borohydride reduction, dehydration, catalytic hydrogenation, lithium aluminium hydride reduction, and oxidation with Fremy’s salt. Reductive acetylation of 18 produced 11,14-diacetoxy-13-(acetoxymethyl)-podocarpa-8,11,13-triene (2). The 1H NMR spectrum of 2 was different from that of 15-acetoxypremnol diacetate which was prepared from natural premnolal. Based on this fact a corrected structure of premnolal is proposed.
EXAFS Spectroscopy of Some Iron(III) Compounds by Use of Dispersive-type In-laboratory X-Ray Spectrometer
Authors: Nomura Masaharu , Asakura Kiyotaka , Kaminaga Ukyo , Matsushita Tadashi , Kohra Kazutake , Kuroda Haruo 
Published: July 2006

Abstract
A dispersive-type in-laboratory EXAFS spectrometer was constructed by combining a transmission-type dispersing crystal and a position-sensitive proportional counter. FeK absorption spectra were measured by use of this apparatus on FeCl3·6H2O, Fe(ClO4)3·6H2O and anhydrous FeCl3. Discussion is given on the results obtained from the analyses of observed EXAFS data concerning the structure around Fe ions in these compounds. AsI3-like structure is proposed for anhydrous FeCl3.
Photoelectron Angular Distribution Study of Some Isoxazoles Combined with Perturbation Theoretic Approach
Authors: Kobayashi Tsunetoshi , Kubota Tanekazu , Ezumi Kiyoshi , Utsunomiya Chikatoshi 
Published: July 2006

Abstract
Photoelectron spectra of isoxazole, 5-methylisoxazole, and 3,5-dimethylisoxazole were studied by the technique of photoelectron angular distribution measurements combined with a first order perturbation theoretic approach. Photoelectron spectra of oxazole, 4-methyloxazole, furan, and 2-methylfuran, which are closely related to isoxazole, were also discussed at the same time for the sake of comparison. The first three bands of the isoxazoles were assigned to the π, π, and n bands from the top, respectively, while those of the oxazoles were identified as the π, n, and π bands from the top.
Studies of the Cobalt(III) Complexes of 8-Amino-3,6-diazaoctanate Ion. III. Preparations and Some Properties of Complexes with Chloro, Nitro, or Aqua Ligands
Authors: Watanabe Kiyokatsu 
Published: July 2006

Abstract
The following new cobalt(III) complexes containing the 8-amino-3,6-diazaoctanate ion (adao) have been prepared: α-[Co(adao)Cl2], two isomers of β-mer(N)-[Co(adao)Cl2], β-fac(N)-[Co(adao)Cl2], α-[Co(adao)(NO2)2], two isomers of β-mer(N)-[Co(adao)(NO2)2], α-[Co(adao)(H2O)2](ClO4)2, and β-mer(N)-[Co(adao)(H2O)2](ClO4)2. The geometrical structures have been determined on the basis of the electronic spectra, the proton NMR spectra, and the deductions from their derivation processes.
Binuclear Metal Complexes. XLII. Manganese(IV) Complexes Synthesized by Oxidation of Binuclear Manganese(II) Complexes of 2-(Salicylideneamino)phenols with Tetrachloro-o-benzoquinone
Authors: Okawa Hisashi , Nakamura Masaaki , Kida Sigeo 
Published: July 2006

Abstract
Manganese(IV) complexes Mn(R-R′-sap)2, where H2(R-R′-sap) denotes 2-(salicylideneamino)phenols with the substituent R on the salicylaldehyde ring and the R′ on the o-aminophenol ring, were prepared by the oxidation of binuclear manganese(II) complexes Mn2(R-R′-sap)2 with tetrachloro-o-benzoquinone (TCOQ). The complexes showed magnetic moments corresponding to three unpaired electrons and strong absorptions in the region 15–20×103 cm−1 attributable to CT transitions. Cyclic voltammograms of Mn(R-R′-sap)2 showed two redox waves which can be interpreted in terms of a two-step reaction, Mn(IV)\ightleftharpoonsMn(III)\ightleftharpoonsMn(II). Both redox potentials of the first and the second processes depend on the substituents R and R′, and there is a good correlation between the redox potentials and Hammett’s σ-values of R and R′ to the phenolic oxygen. Mn2(R-R′-sap)2 reacts with TCOQ to give a binuclear manganese(III) complex Mn2(R-R′-sap)2(tcoq), which decomposes in the presence of water forming Mn(R-R′-sap)2.
Binuclear Metal Complexes. XLIII. Magnetic, Spectroscopic, and Electrochemical Studies on Hetero-metal Binuclear Complexes of N,N′-Bis(3-carboxysalicylidene)-1,1-dibenzylethylenediamine
Authors: Kanda Wakako , Nakamura Masaaki , Okawa Hisashi , Kida Sigeo 
Published: July 2006

Abstract
Copper(II)–M(II) and copper(II)–iron(III) hetero-metal binuclear complexes of N,N′-bis(3-carboxysalicylidene)-1,1-dibenzylethylenediamine (H4fsadb), CuM(fsadb)·nH2O (M=Co, Ni, Cu, Zn, Mg, Ca, Ba) and CuFe(fsadb)Cl·1.5H2O, have been prepared and characterized. Cryomagnetic measurements (78–300 K) revealed that an antiferromagnetic spin-exchange interaction operates between the metal ions in the cases CuM(fsadb)·nH2O (M=Co, Ni, Cu) and CuFe(fsadb)Cl·1.5H2O, exchange integrals being evaluated on the basis of the Heisenberg model. Ligand field bands due to the copper(II) ion bound at the N2O2-site of CuM(fsadb)·nH2O (M=Co, Ni, Cu, Zn, Mg) and CuFe(fsadb)Cl·1.5H2O are in the range 1.9×103–21.4×103 cm−1, while in the cases of CuCa(fsadb)·4H2O and CuBa(fsadb)·3.5H2O the frequencies of the bands are close to that (17.8×103 cm−1) of the mononuclear complex Cu(H2fsadb)·H2O. This spectral feature has been explained in terms of the configuration of the second metal ion adjacent to the copper(II) ion: trans-octahedral in the cases of small metal ions (Fe(III), Co(II), Ni(II), Cu(II), Zn(II), Mg(II)) and presumably cis-octahedral in the cases of large metal ions (Ca(II), Ba(II)). Copper(II/I) redox potentials of the hetero-metal complexes are much low compared with that of Cu(H2fsadb)·H2O. This shift has been discussed in terms of the electronic effect of the carboxylate group and the covalency in the bonding between the bridging phenolic oxygen and the second metal ion.
Electron Transfer between Hexacyanoferrate(III) and Thiosulfate. Kinetic Studies in the trans-Dihydroxotetraoxoosmate(VIII) Oxidation and the trans-Dihydroxotetraoxoosmate(VIII)-catalyzed Hexacyanoferrate(III) Oxidation of Thiosulfate in Aqueous Alkaline Media
Authors: Panda Rama Krushna , Neogi Gautam , Ramaswamy Dorai 
Published: July 2006

Abstract
Kinetics of oxidation of thiosulfate to tetrathionate by trans-dihydroxotetraoxoosmate(VIII) (Os(VIII)) and by hexacyanoferrate(III) in the catalytic presence of Os(VIII) have been studied in aqueous alkaline media. The observed pseudo-first-order rate constants for disappearance of Os(VIII) in the Os(VIII)–S2O32− system (kobsd), and those for disappearance of hexacyanoferrate(III) in the Os(VIII)-catalysed Fe(CN)63−–S2O32− system (kcat) conform, respectively, to Eqs. A and B:
k obsd=k3KOsK2[S2O32−](1+KOs[OH−]+KOsK2[S2O32−])−1, (A)
k cat=k6KOsK2[Os(VIII)][OH−][S2O32−](1+KOsK2[S2O32−])−1, (B)
where KOs is the stability constant of trans-dihydroxotetraoxoosmate(VIII) in aqueous alkaline media, K2 and k3 are the formation and decomposition constant of the intermediate complex 1, and k6 refers to the rate constant of electron-transfer from 1 to hexacyanoferrate(III). The values of KOs and K2, as obtained from spectrophotometric titrations and stopped-flow spectrophotometry, respectively, are 19.5±3 dm3 mol−1 and 5.58±0.13; the computed values from kinetic data of KOs, K2, and k3 at 30 °C and μ=0.32 mol dm−3, and that of k6 at 35 °C and μ=0.32 mol dm−3 are 22.5±2 dm3 mol−1, 6.12±0.5, (3.32±0.3)×10−1 dm3 mol−1s−1, and (3.31±0.3)×10−2 dm6 mol−2s−1, respectively. Possible mechanisms for electron-transfer are discussed in terms of an initial equilibrium interaction between Os(VIII) and S2O32− forming an intermediate complex [OsO4(OH)(S2O3)3−] (1) followed by (a) a rate-determining decomposition of 1, with concomitant electron-transfer, in the Os(VIII)–S2O32− system, and (b) a rate-determining outersphere electron-transfer from 1 to hexacyanoferrate(III) in the Os(VIII)-catalyzed Fe(CN)63−–S2O32− system.
The Conversion of Benzyl Alcohols into Phenylacetic Acid Derivatives by Cobalt Carbonyl Catalyzed Carbonylation
Authors: Imamoto Tsuneo , Kusumoto Tetsuo , Yokoyama Masataka 
Published: July 2006

Abstract
Benzyl alcohols were converted into the corresponding one carbon-homologated amides or esters in one pot by cobalt carbonyl catalyzed carbonylation in the presence of ethyl polyphosphate (PPE) and sodium iodide.
Determination of Circular Dichroism in Multiple Scattering Systems
Authors: Taniguchi Yutaka , Shimura Yoichi 
Published: July 2006

Abstract
In a thick suspension circular dichroism cannot be directly determined by the Grosjean-Legrand type CD instrument, because Lambert’s law does not hold in it. The transfer of light intensity is discussed when polarized light is incident on a plane-parallel scattering medium containing randomly oriented, optically active particles. This problem is analyzed based on a two-beam radiative transfer model. We provide a method to determine the molar CD in a multiple scattering system. The measurements of ellipticity and transmittance with conventional instruments is served for our method by using a plate of opal glass. The molar CD is determined in Nujol mulls of Λ-[Co(en)3]Br3·H2O and [Co(NH3)6](d-tart)1.5·5H2O. The results are reproducible and reliable.
Synthetic Approach toward Antibiotic Tunicamycins. II.
Authors: Fukuda Yoshimasa , Kitasato Hiderou , Sasai Hiroaki , Suami Tetsuo 
Published: July 2006

Abstract
Some higher-carbon carbohydrates, dodecose derivatives, have been synthesized by means of the basecatalyzed addition of nitro sugar to sugar aldehyde. The addition reaction of 6,7-dideoxy-1,2:3,4-di-O-isopropylidene-7-nitro-α-d-galacto-heptopyranose to 2,3:4,5-di-O-isopropylidene-d-arabinose yielded three isomeric dodecose derivatives, and their configurations have been studied. The nitro dodecose derivatives were converted into the corresponding hydroxy and acetoxy derivatives.
The Extraction of Bivalent Transition Metals from Aqueous Chloride Solutions by Long-chain Alkyl Quaternary Ammonium Carboxylates
Authors: Sato Taichi , Yamamoto Masahiro 
Published: July 2006

Abstract
The extraction of bivalent manganese, cobalt, nickel, and copper from aqueous chloride solutions by longchain alkyl quaternary ammonium carboxylates, prepared by combination of trioctylmethylammonium chloride (R3R′NCl) and carboxylic (octanoic, decanoic, and lauric) acids (R″COOH) in benzene, has been investigated under different conditions. The organic phases are examined by spectrophotometry and infrared spectral measurement. The mechanism of the extraction is discussed on the basis of the results obtained. The extraction efficiency follows the order Cu&gt;Co\simeqNi&gt;Mn, and the extraction process is expressed as M2+(aq)+2Cl−(aq)+3R3R′NR″COO(org)\ightleftarrows(R3R′N)[M(R″COO)3](org)+2R3R′NCl(org), in which M=Mn, Co, Ni, and Cu. The extracted species of bivalent manganese, cobalt, nickel, and copper exist as the complex (R3R′N)[M(R″COO)3] in an octahedral arrangement.
Properties of Magnesium Oxides Prepared from Various Salts and Their Catalytic Activity in 1-Butene Isomerization
Authors: Matsuda Tsuneo , Tanabe Jun , Hayashi Nobuatsu , Sasaki Yoh , Miura Hiroshi , Sugiyama Kazuo 
Published: July 2006

Abstract
The basicity, one-electron donor property, and surface area were examined on the magnesium oxide catalysts prepared from six different kinds of magnesium salts. Magnesium oxide prepared from magnesium nitrate, oxalate, and acetate exhibited strong basicity and relatively large surface area and, on the other hand, MgO prepared from magnesium chloride, carbonate and sulfate had relatively weak basicity and small surface area. Number of one-electron donor centers hardly changed in the variety of magnesium oxides, except the one prepared from magnesium chloride. Magnesium oxide prepared from chloride showed both the lowest basicity with less strength than H−=15.0 and surface area in the six kinds of catalysts. In order to examine the influence of remaining anions in MgO a variety of catalysts were prepared by the addition of ammonium chloride, sulfate, and carbonate, respectively in MgO prepared from the nitrate. Ammonium chloride brought the greatest influence on the basicity, one-electron donor property, and surface area. Thus the remaining chloride ion greatly affected such properties as cited above. Sodium nitrite which decomposes at higher temperature than 320 °C was added to the magnesium oxides for the examination of the effect of the sodium cation. The amount of the basicity with a moderate strength (H−=15.0–22.3) increased by the addition of NaNO2. This was ascribed to the formation of the moderate strength of basicity by the interaction of Na2O, one of the decomposed products of NaNO2 and MgO. Isomerization of 1-butene was carried out on the six kinds of catalysts at 30 °C. The magnesium oxides prepared from nitrate, oxalate, and acetate salts (group A) exhibited isomerization activity and the ones from chloride, sulfate, and carbonate (group B) did not entirely. The isomerization activity could be correlated with the stronger basicity than H−=22.3. Temperature pregrammed desorption curves of acetic acid adsorbed on the catalysts indicated two peaks at around 350 and 420 °C in group A catalysts and only one at 350 °C in group B. The desorbed peak at around 420 °C was assigned to the adsorbed acetic acid on the stronger basic sites than H−=22.3.