bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Effects of the Reaction Variables on the Yields of Acrylic Acid and Methyl Acrylate in the Reaction of Acetic Acid with Methanol in the Presence of Oxygen
Authors: Ai Mamoru 
Published: July 2006

Abstract
The effects of the reaction variables on the yields of the aldol condensation products, i.e., acrylic acid and methyl acrylate, in the reaction of acetic acid with methanol in the presence of gaseous oxygen was studied using a V–Ti–P ternary oxide catalyst with an atomic ratio of 1:2:6, respectively. The best catalyst performance was obtained with an oxygen/methanol molar ratio of between 0.5 to 0.75. The yield of acrylic acid decreased with increasing the methanol concentration, while that of methyl acrylate increased; the sum of the two yields increased with methanol concentration above 360°C. The feed rate did not have much effect on the yield, except at high conversions. Better catalytic performance was observed with longer contact times at lower temperatures than with shorter contact times at higher temperatures.
Preparation and Characterization of Cobalt(III)-Dimethyldithiocarbamato Complexes Containing R2P(CH2)nPR2 (R=CH3, C6H5; n=1,2,3,4) and PR3 (R=C2H5, C6H5). Crystal Structure of [Co{(CH3)2NCS2}{(CH3)2PCH2P(CH3)2}2](BF4)2
Authors: Kita Masakazu , Okuyama Akiyoshi , Kashiwabara Kazuo , Fujita Junnosuke 
Published: July 2006

Abstract
Twelve new cobalt(III)-phosphine complexes, [Co(dtc)x{(CH3)2P(CH2)nP(CH3)}2}3−x](3−x)+ (x=1, 2; n=1,2,3), [Co(dtc)2{(C6H5)2P(CH2)nP(C6H5)2}]+ (n=1,2,3,4), and trans-[Co(dtc)2(PR3)2]+ (R=C2H5, C6H5) were prepared, where dtc denotes dimethyldithiocarbamate(1–). The molecular structure of [Co(dtc){(CH3)2PCH2P(CH3)2}2](BF4)2 was determined by X-ray analysis. Crystal data are: monoclinic, space group Cc, a=15.927(4), b=11.726(2), c=14.422(7) Å, β=91.38(3)°, V=2692.6(15) Å3, Z=4, R=0.058 for 2251 reflections. The complex ion forms a distorted octahedron with the small P–Co–P (73.1(2) and 75.5(2)°) and S–Co–S (75.97(9)°) chelate angles. The mean Co–P and Co–S distances are 2.238(5) and 2.285(3) Å, respectively. On the basis of the angular overlap model(AOM) treatment, the ligand field bands were assigned and the effect of ring size of diphosphine chelates on these bands were examined. Positive eπ(P) values were necessary to satisfy the observed data, and the result indicates that the Co-dπ orbitals are destabilized by coordination of the phosphine ligand.
Systematic Enumeration of High Symmetry Molecules by Means of Unit Subduced Cycle Indices with and without Chirality Fittingness
Authors: Fujita Shinsaku 
Published: July 2006

Abstract
A novel method of enumerating isomers is presented by using adamantane as a parent skeleton. This method is based on unit subduced cycle indices with and without chirality fittingness, the indices being derived from the subduction of coset representations. The chirality fittingness, which is determined by examining the relationship between a point group and its subgroup, controls the mode of substitution by achiral and chiral substituents. The method provides detailed enumerations concerning symmetries and molecular formulas, whereas Pólya’s theorem takes only the latter into consideration.
The Use of Different Figure-Inventories in the Enumeration of Isomers Derived from Non-Rigid parent Molecules
Authors: Fujita Shinsaku 
Published: July 2006

Abstract
Inevitable use of different figure-inventories is discussed in the enumeration of non-rigid isomers derived from 2,2-diphenyl-(1) and 2,2-dimethylpropane (2) by means of unit subduced cycle indices (USCIs). Such a parent non-rigid molecule is divided into a rigid skeleton and mobile moieties. Thus, the molecule (1) consists of a rigid skeleton of C2v symmetry, a methyl moiety of C3v symmetry and a phenyl moiety of C2v symmetry. The molecule (2) contains a Td rigid skeleton and a C3v moiety. The USCIs are used in the first enumeration of mobile moieties as well as the subesequent enumeration based on a rigid skeleton. A general procedure for enumerating non-rigid isomers is discussed.
Electrosorption of Tetraethylene Glycol Monododecyl Ether at the Polarized Nitrobenzene–Water Interface
Authors: Kakiuchi Takashi , Usui Taketoshi , Senda Mitsugi 
Published: July 2006

Abstract
The adsorption of tetraethylene glycol monododecyl ether, C12E4, has been studied by measuring the electrocapillary curves at the polarized interface between the nitrobenzene solution of 0.1 mol dm−3 tetrapentylammonium tetraphenylborate and the aqueous solution of 0.05 mol dm−3 lithium chloride. C12E4 adsorbed at the interface over the entire polarized potential range of 250 mV. Although C12E4 itself is a neutral molecule, its surface activity was greatly affected by changing the potential drop across the interface; an increase in the potential of the aqueous phase with respect to the potential in the nitrobenzene phase markedly enhanced the adsorption. The complex formation between the adsorbed C12E4 molecules and Li+ ions in the aqueous side of the interface was shown to play a decisive role in determining the dependence of adsorption on the electrical potential difference across the interface. A proposed model for complex formation at the interface based on the Gouy–Chapman double-layer theory well-explained the observed trend in the adsorption Gibbs energy when the potential drop across the interface was changed.
Preparation and Characterization of Cobalt(III) Complexes Containing 3,7-Diphenyl-3,7-diphosphanonane-1,9-diamine, NH2CH2CH2P(C6H5)CH2CH2CH2P(C6H5)CH2CH2NH2
Authors: Jung Minho , Atoh Masamichi , Kashiwabara Kazuo , Fujita Junnosuke 
Published: July 2006

Abstract
New cobalt(III) complexes with the titled ligand and its analog, cisα-[Co(L)(rac(P)-232NPPN)]n+ (L=2,4-pentanedionate (acac) and oxalate(ox) ions, and ethylenediamine(en)), cisβ-[Co(L)(rac(P)-or meso(P)-232NPPN)]n+ (L=acac and ox) and cisα-[Co(acac)(rac(P)-222NPPN)]2+ and cisβ-[Co(acac) (meso(P)-222NPPN)]2+ were prepared and characterized by 1H and 13C NMR,. and absorption spectra, where rac(P)-and meso(P)-232NPPN and -222NPPN denote recemic(P)-and meso(P)-NH2CH2CH2P(C6H5)(CH2)nP(C6H5)CH2CH2NH2 with n=3 and 2, respectively. All the cisα isomers except the en complex react with concd hydrochloric acid at room temperature to yield the corresponding cisα-dichloro complexes. For the cisβ isomers, the acac complexes dissociate one amino group of NPPN reversibly depending on the acidity of solution, yielding [Co(acac)(H2O)(NPPNH+)]3+, while the ox complexes of rac(P)-and meso(P)-232NPPN yield the cisα and trans-dichloro complexes, respectively in hydrochloric acid. All the cisβ isomers except [Co(ox)(rac(P)-232NPPN)]+decompose slowly in coned hydrochloric acid to give Co(II) species.
Studies of the Acidity and Ionic Conductivity of Silica-Supported Heteropoly Compounds. II. Acidity and Catalytic Activity of Supported Heteropoly Compound Catalysts
Authors: Ohtsuka Reiji , Morioka Yoshio , Kobayashi Jun-ichi 
Published: July 2006

Abstract
The acidity function, H0, of silica-supported heteropoly compounds (HPC) such as H3PMo12O40, H3PW12O40, and their sodium, potassium, ammonium, cesium, and bismuth oxide salts has been examined in connection with their catalytic activity for the dehydration of t-butyl alcohol (TBA). The values of H0 for the respective catalysts have been determined spectrophotometrically utilizing adsorbed dicinnamylideneacetone (DCA) as a probe molecule. A linear relationship has been established between the amount of HPC supported (logm) and its H0. Also, for the dehydration of TBA in the liquid-phase all plots of logk1′ vs. H0 fall on a straight line with a slope of −1, independent of the kind of catalyst. In this case k1′ is the apparent rate constant of the dehydration of liquid TBA. On the other hand, for the gas-phase dehydration of TBA the plots yield straight lines with different slopes, depending on the type of catalyst. The dependence of the catalytic activity on the H0 supports the previous conclusion that the dehydration of liquid and gaseous TBA proceeds through pseudo-liquid and outer-surface mechanisms, respectively.
Conformational Adaptation: A New Aspect of Substitutent Effects
Authors: Inagaki Satoshi , Okajima Takehiko , Yamamura Kimiaki , Miyake Hideyoshi , Nakasuji Kazuhiro , Murata Ichiro 
Published: July 2006

Abstract
Methoxyl (CH3O–) substituent on unsaturated molecules was suggested by ab initio molecular orbital calculation and qualitative orbital interaction theory to change from coplanar to vertical conformation on electron acceptance. The conformational adaptation can make it possible that methoxyl group is less electron-donating than methyl group.
Structures Optimized by Molecular Mechanics for 15-Crown-5 and Its Water-Accommodating Species
Authors: Fukushima Kunio 
Published: July 2006

Abstract
Optimization of the structure for 15-crown-5 and its water-accommodating species was carried out by a molecular mechanics calculation. Molecular deformation presumed from the Raman spectral feature of 15-crown-5 in aqueous solutions was confirmed by the results of the calculation.
Photocatalytic Reaction on Layered Cs–Nb–Ti Complex Oxide
Authors: Sekine Toshiko , Yoshimura Joji , Tanaka Akira , Domen Kazunari , Maruya Ken-ichi , Onishi Takaharu 
Published: July 2006

Abstract
Ion-exchangeable layered titano-niobates, CsNbTi2O7 and CsNbTiO5, were prepared and the photocatalytic properties of those oxides as well as of the H+-exchanged forms were investigated. H2 or O2 evolution reaction from an aqueous methanol solution or from an aqueous silver nitrate solution was carried out under a high pressure mercury lamp irradiation. For H2 evolution, Pt (0.1 wt%)-loaded H+-exchanged forms showed remarkable activity both for CsNbTi2O7 and CsNbTiO5, while higher rates of O2 evolution were obtained for H+-exchanged forms than those for the original forms.
1H NMR Study of the Motion of Guanidinium Ions in Guanidinium Dichloroiodate(I) and Tetrachloroiodate(III)
Authors: Furukawa Yoshihiro , Nakamura Daiyu 
Published: July 2006

Abstract
The temperature dependence of the 1H NMR spin-lattice relaxation time, T1, was measured for C(NH2)3ICl2 and C(NH2)3ICl4. For the dichloro complex, three T1 minima were observed and assigned to the reorientations of crystallographically inequivalent C(NH2)3+ ions about the three-fold axes, each of which has an activation energy of 21, 15, and 8.4 kJ mol−1. The tetrachloro complex yielded a single T1 minimum with an activation energy of 33 kJ mol−1. A phase transition in C(NH2)3ICl2 was found at 399 K by NMR and differential thermal analysis.
MNDO RHF CI and MINDO/3 RHF CI Calculations of Hyperfine Coupling Constants of π Radicals
Authors: Morihashi Kenji , Takase Hideto , Kikuchi Osamu 
Published: July 2006

Abstract
MNDO RHF CI and MINDO/3 RHF CI calculations, in which one type of singly-excited configuration is included, were shown to give hyperfine coupling constants of π radicals which are in better agreement with the experimental values, as compared with the UHF method.
Highly Diastereoselective 1,2-Asymmetric Addition of Dialkylzincs to Chiral 2-Phenylpropanal Catalyzed by Amino Alcohol
Authors: Soai Kenso , Niwa Seiji , Hatanaka Toshihiro 
Published: July 2006

Abstract
Diastereoselective addition of dialkylzinc reagents to 2-phenylpropanal using amino alcohol as catalyst afforded erythro alcohols (Cram-selectivity) in high diastereomeric excess (up to 88% d.e.).
Evidence of Conversion from Carbon Dioxide to Unstable Carbon Oxides
Authors: Akiyama Fuminori 
Published: July 2006

Abstract
A reaction of reduction products of carbon dioxide by benzoin carbanion with sodium dithionite gave a substance showing only one 13C NMR absorption signal at 75.4 ppm, which was tentatively attributed to a signal of an oligomer having a –C(SO3Na(H))2– structure as a repeating unit.
Synthesis of 4,4-Disubstituted 2,3-Dicyano-5-imino-2-pyrrolines. Reaction of Alkylidenemalononitriles with Trimethylsilyl Cyanide
Authors: Chatani Naoto , Hanafusa Terukiyo 
Published: July 2006

Abstract
The reaction of alkylidenemalononitriles with trimethylsilyl cyanide in the presence of KCN/18-crown-6 gave 4,4-disubstituted 2,3-dicyano-5-imino-2-pyrrolines in high yields.
Electronic Structures of 2,7-Bis(methylthio)-1,6-dithiapyrene (MTDTPY) Charge Transfer Complexes
Authors: Kawamoto Atsushi , Tanaka Jiro , Sasaki Mitsuru , Murata Ichiro , Nakasuji Kazuhiro 
Published: July 2006

Abstract
Polarized reflection spectra were measured on two charge-transfer complexes of 2,7-bis(methylthio)-1,6-dithiapyrene (MTDTPY) with chloranil and 7,7,8,8-tetracyanoquinodimethane (TCNQ), which showed metallic conductivity. In spite of short intercolumnar S–S contacts, the spectra showed a strong one-dimensional character. The optical conductivity spectra, σ(ω), and real part of the dielectric constant, ε′(ω), along the stack axis were obtained by means of Kramers–Kronig transformation. The conductivity spectra and the dielectric constant of both complexes substantially differ from the simple Drude model. These results were analyzed with a one-dimensional electron localization model in a disordered system with the optical parameters: ωp=13500 cm−1, τi=1.6×10−15s (τi−1=3300 cm−1) for chloranil complex and ωp=12000 cm−1, τi=2.5×10−15s (τi−1=2100 cm−1) for TCNQ complex.
Modification of an Ion-Exchange Membrane Surface by Plasma Process Part 3: Interfacial Resistance of Monovalent Cation Perm-Selective Membrane from Nafion®
Authors: Ogumi Zempachi , Uchimoto Yoshiharu , Tsujikawa Masanori , Yasuda Kazuaki , Takehara Zen-ichiro 
Published: July 2006

Abstract
The monovalent cation perm-selectivity of Nafion® 117, perfluoro-sulfonate cation-exchange membrane, was enhanced by depositing on its surface an ultrathin anion-exchange layer prepared by plasma polymerization. The anion exchanger was deposited from a 4-vinylpyridine monomer vapor followed by quaternarization with 1-bromopropane. The resulting anion-exchange layers were found to be pinhole-free and of uniform thickness. The monovalent cation perm-selectivity of the plasmamodified Nafion membrane was determined by measuring the Fe 2+ ion transference number, tFe in a Li+–Fe2+ system. The influence of the thickness of the plasma layers on the tFe and the membrane resistance was investigated. The tFe decreased with increasing thickness of the plasma polymer layer, but at the cost of enhanced membrane resistance. The resistance of treated Nafion was separated into bulk resistance and interfacial resistance. A large interfacial resistance was observed between Nafion and the plasma polymer layer, and was ascribed to the implantation of cation species.
Effects of Phenyl Groups on Thermodynamic Parameters of Lanthanoid(III) Complexation with Aromatic Carboxylic Acids
Authors: Hasegawa Yuko , Yamazaki Nobuhiko , Usui Satoko , Choppin Gregory R 
Published: July 2006

Abstract
The enthalpy changes as well as the stability constants of the complexes between a series of lanthanoid(III) cations and phenylacetate, 3-phenylpropionate, and salicylate ions have been measured using a potentiometer and an isothermal calorimeter, respectively. The data were compared with the data with benzoate ions. The enthalpy changes for formation of the heavier lanthanoid(III) complexes are larger than those for the complexation of the lighter lanthanoids. Also, the complexation heat changes by the carboxylate ions having methylene group(s) between the carboxyl and the phenyl groups are more endothermic than by the anions in which these two groups are joined directly. The results are explained in terms of the differences in the dehydration of the lighter lanthanoid(III) from that of the heavier ones upon complexation and also the different basicities of the carboxylate ions of the ligands.
Solvent Extraction of Palladium(II) and Platinum(IV) with N,N-Dioctylsuccinamic Acid from Aqueous Chloride Media
Authors: Yoshizuka Kazuharu , Baba Yoshinari , Inoue Katsutoshi , Wada Fumio , Matsuda Tsutomu 
Published: July 2006

Abstract
N,N-Dioctylsuccinamic acid was synthesized to examine the selectivity for various metals in extractions from hydrochloric acid. It was found to be highly selective for palladium(II), platinum(IV), and mercury(II) over other base metals including copper(II), nickel(II), cobalt(II), zinc(II), iron(III), aluminum(III), and gallium(III). A quantitative study was conducted on the extraction equilibria of palladium(II) and platinum(IV) from aqueous chloride media with N,N-dioctylsuccinamic acid in toluene, together with measurement of the apparent molecular weight of the extractant. It was elucidated that the extractant (HR) dimerizes in toluene and that palladium(II) and platinum(IV) are extracted according to the following reactions:
&PdCl_4^2-+‾H_2R_2 \oversetK_e,Pd\ightleftharpoons ‾PdR_2+2H^++4Cl^-
& PtCl_6^2-+‾H_2R_2 \oversetK_e,Pt\ightleftharpoons ‾PtCl_4·2HR+2Cl^-
The extraction equilibrium constants of palladium(II) and platinum(IV) with the extractant were evaluated as follows: Ke,Pd=0.11±0.03 (mol·dm−3)5 and Ke,Pt=27.7±3.7 mol·dm−3, respectively.
Synthesis of a Homostatine-Containing Renin Inhibitor Which Incorporates a Sulfonemethylene Isostere at Its N-Terminus
Authors: Nakano Masato , Atsuumi Shugo , Koike Yutaka , Tanaka Seiichi , Funabashi Hiroshi , Hashimoto Junko , Ohkubo Mitsuru , Morishima Hajime 
Published: July 2006

Abstract
A homostatine analogue, (2RS,4S,5S)N-isobutyl-5-amino-2-ethyl-4-hydroxy-7-methyloctanamide, was synthesized starting from natural statine. The modified Horner–Wadsworth–Emmons reaction of (4S,5R)-3-benzyloxycarbonyl-5-formyl-4-isobutyl-2,2-dimethyloxazolidine is a key reaction for the synthesis of a homostatine analogue. Stereoselective and stereospecific syntheses of a N-terminal precursor, N-[(2R)-3-hydroxy-2-(1-naphthylmethyl)propionyl]-l-norleucine t-butyl ester and a total synthesis of a highly active renin inhibitor, (2RS,4S,5S)-N-isobutyl-5-[[N-[(2S)-2-(1-naphthylmethyl)-3-(2-pyrimidinylsulfonyl)propionyl]-l-norleucyl]amino]-2-ethyl-4-hydroxy-7-methyloctanamide are described.
Multi-Dimensional Stacking Structures in Phthalocyanine-Based Electrical Conductors, K[Co(phthalocyaninato)(CN)2]2·5CH3CN and Co(phthalocyaninato)(CN)2·2H2O
Authors: Inabe Tamotsu , Maruyama Yusei 
Published: July 2006

Abstract
Two kinds of electrically conducting crystals have been obtained by the electrochemical oxidation of potassium dicyanophthalocyaninatocobalt(III), KCo(Pc)(CN)2. Oxidation in acetonitrile gives K[Co(Pc)(CN)2]2·5CH3CN, in which the phthalocyanine rings are two-dimensionally stacked. Since some of the acetonitrile molecules can be easily removed from the lattice, the crystal is not stable outside of the solution. Mosaically distorted crystals, which are exposed to air, show relatively high conductivities (≈10 Ω−1cm−1 at room temperature). On the other hand, oxidation in benzonitrile in the presence of dibenzo-18-crown-6 yields Co(Pc)(CN)2·2H2O, in which the phthalocyanine rings are three-dimensionally stacked. The water molecules in this crystal form hydrogen bonds, and the crystal is stable against drying. The conductivity of this crystal is ≈1 Ω−1cm−1 at room temperature. The multi-dimensionalities observed in these two kinds of crystals arise from a slipped stacking of phthalocyanine, due to steric interactions of the axial substituents.
The Crystal and Band Electronic Structures of Bis[4,5-ethylenedithio-4′,5′-(vinylenedithio)tetrathiafulvalenium] Hexafluorophosphate, and Hexafluoroarsenate [EVT2PF6 and EVT2AsF6]
Authors: Nakano Hideyuki , Miyawaki Kenji , Nogami Takashi , Shirota Yasuhiko , Harada Shigeharu , Kasai Nobutami , Kobayashi Akiko , Kato Reizo , Kobayashi Hayao 
Published: July 2006

Abstract
The molecular and crystal structures of EVT2PF6 and EVT2AsF6 [EVT=4,5-ethylenedithio-4′,5′-(vinylenedithio)tetrathiafulvalene] were determined by an X-ray diffraction method. Tight-binding band-structure calculations were made, and the results were compared with those of closely resembling conducting salts, α-(BEDT-TTF)2PF6 and VT2PF6 [BEDT-TTF=bis(ethylenedithio)tetrathiafulvalene; VT=bis(vinylenedithio)tetrathiafulvalene]. It was concluded that the extent of the two-dimensional nature of the band electronic structure increased systematically in the order VT2PF6, EVT2PF6, and α-(BEDT-TTF)2PF6; this result was analysed in terms of their crystal structures.
Studies of Aqueous Resins. I. Water-Dispersed Polyesters Containing Polar Groups
Authors: Kotera Nobukazu , Takahashi Kensuke 
Published: July 2006

Abstract
Water-borne polyesters which can provide a flexible film having a high resistance to water have been designed. Such hydrophobic polyesters can be dispersed into water by introducing small amounts of hydrophilic groups. When a few mol% of sodium 5-sulfonatoisophthalic acid is used as a hydrophilic group and some water-soluble organic compounds, such as 2-butoxyethanol, are used as additives, stable aqueous dispersions of polyester resins are obtained, having a fine particle size under 1.0 μm.
Studies of a Hydrous Tin(IV) Oxide Ion Exchanger. VI. Rate of the Isotopic Exchange of Cobalt Ions between the Exchanger in the Cobalt Form and Aqueous Solutions
Authors: Yamazaki Hiromichi , Itami Akira , Inoue Yasushi 
Published: July 2006

Abstract
The isotopic exchange rate of cobalt ions between a hydrous tin(IV) oxide ion exchanger and aqueous solutions was radiochemically measured in order to obtain fundamental data which could be useful for elucidating the ion-exchange kinetics of the material for the transition metal elements. This rate can be understood by considering that the cobalt in an exchanger exists as three species: (A1) dissociated ions which can diffuse in the exchanger particles; (A2) weakly bound ions to the exchange sites, which are in local equilibrium with A1; and (B) covalently fixed ions to the exchange sites, which are exchanged very slowly with A1. At a small ratio of the amount of B to the total amount of cobalt sorbed on the exchanger, the rate is controlled by the diffusion of A1, with effective diffusion coefficient, \barDeff, a value which depends on the concentration ratio of A2 to A1. When B predominates over A, the concentration ratio of B to A1 greatly affects \barDeff. The values of \barDeff and their activation energy (20 kJ mol−1) were also estimated.
First Synthesis of [Fe4(η5)-C5H5)4S4](PF6)3 and Improved Syntheses of [Fe4(η5-C5H5)4S4](PF6)n (n=1,2)
Authors: Ogino Hiroshi , Satoh Asako , Shimoi Mamoru 
Published: July 2006

Abstract
[Fe4(η5)-C5H5)4S4](PF6) and [Fe4(η5-C5H5)4S4](PF6)2 were prepared in 81 and 82% yields, respectively, by bulk electrolysis of [Fe4(η5-C5H5)4S4] at the requisite potentials according to the results of voltammetric studies. [Fe4(η5-C5H5)4S4](PF6)3 was prepared and isolated first by electrolysis of [Fe4(η5-C5H5)4S4](PF6)2 in acetonitrile at +0.95 V vs. SCE in 83% yield. The electronic spectral data for [Fe4(η5-C5H5)4S4]n (n=0, 1+, 2+, 3+) were collected.
Amphiphilic Porphinatoirons Having Steroid Groups and Their Oxygen-Adduct Formation in an Aqueous Medium
Authors: Tsuchida Eishun , Komatsu Teruyuki , Babe Takeshi , Nakata Taisaku , Nishide Hiroyuki , Inoue Hidenari 
Published: July 2006

Abstract
Amphiphilic heme derivatives having four steroid groups (steroid-heme), 5,10,15,20-tetrakis[α,α,α,α-o-[2,2-dimethyl-8-(3α-hydroxycholan-24-oyloxy)octanamido]phenyl]porphinatoiron (1b) and 5,10,15,20-tetrakis[α,α,α,α-o-(3-acetoxycholan-24-oylamino)phenyl]porphinatoiron (2b), were synthesized as a model of an oxygen carrier. They were efficiently embedded in the bilayer of a phospholipid liposome based on their high compatibility with the lipid. The oxygen-binding ability of 1b was compared with those of hemoglobin (Hb) and myoglobin (Mb). The dioxygen adduct of 1b was also characterized by Mössbauer and infrared spectroscopy.