bluuebunny/crossref_metadata_2025_split huggingface dataset:
Ruthenium(II)Cl2-Bis(oxazolinyl)bipyridine Complex. Its Structure and Reactivity
Authors: Nishiyama Hisao , Park Soon-Bong , Haga Masa-aki , Aoki Katsuyuki , Itoh Kenji 
Published: April 2006

Abstract
A mixture of [Ru(II)Cl2(p-cymene)]2 and 6,6′-bis(oxazolinyl)-2,2′-bipyridine (Bipymox-ip) was heated in ethanol at 70 °C to produce Ru(II)Cl2(Bipymox-ip), of which structure was clarified by X-ray analysis to show that Bipymox-ip binds as a tetradentate ligand. Its catalytic activities for transformations of diazoacetates in dimerization and cyclopropanation with styrene were examined and its spectroelectrochemistry was studied.
Conducting Pattern Formation of Electrochemically Polymerized Thiophene in an Organopolysilane Film Imaged by Ultra-Violet Light
Authors: Tachibana Yasuhiro , Sakurai Yoshiaki , Yokoyama Masaaki 
Published: April 2006

Abstract
The electrochemical polymerization of thiophene was successfully performed in an organopolysilane film on an indium tin oxide (ITO) glass electrode as patterned by the Ultra-Violet (UV) light irradiation. It was demonstrated that only the UV-exposed polysilane dissolved into polar solvent such as propylene carbonate used as electrolytic solvent and hence electrochemical polymerization proceeded on the ITO electrode masked with the UV-unexposed polysilane. Fine line patterns of 10 μm width were obtained.
Ligand Exchange Reactions of Thienylene-Bridged Dinuclear Platinum Complex with Diphosphines. Synthesis and Molecular Structure of Diphosphine-Bridged μ-2,5-Thienylene Diplatinum Complex
Authors: Kotani Sonae , Adachi Tomohiro , Yoshida Toshikatsu , Onitsuka Kiyotaka , Sonogashira Kenkichi 
Published: April 2006

Abstract
While treatment of bis{chloro(1,5-cyclooctadiene)platinum(II)}-μ-2,5-thienylene (1) with bis(diphenylphosphino)alkanes, Ph2P(CH2)nPPh2, having a short methylene chain (n = 2, 3) leads to the formation of diphosphine-chelate diplatinum complexes, in the reactions of 1 with diphosphines having a long alkyl chain (n = 4, 5, 6), diphosphine-bridged diplatinum complexes were produced. The molecular structure of the complex, in which two platinum atoms are bridged by two 1,6-bis(diphenylphosphino)hexane ligands and 2,5-thienylene group, was determined by a single-crystal X-ray diffraction study.
Preparation of Oxo-Bridged Dinuclear Iron(III) Complexes with One or Two O,O′-Bridged Optically Active Amino Acids
Authors: Sasaki Yoichi , Umakoshi Keisuke , Kimura Shuji , Oh Chang-Eon , Yamazaki Mikio , Shibahara Takashi 
Published: April 2006

Abstract
Amino-acid bridged diiron complexes, [Fe2(μ-O)(μ-L)2(tacn)2]4+ (tacn = 1,4,7-triazacyclononane; L = (S)-valine or (S)-proline) and [Fe2(μ-O)(μ-L)(tpa)2]4+ (tpa = tris(2-pyridylmethyl)amine; L = (S)-valine, (S)-proline, or (S)-alanine) have been prepared. Crystal structures of the two tacn complexes were determined. Electronic absorption spectra and redox properties of these complexes are similar to the corresponding μ-acetate complexes.
A Novel Homogeneous Liquid-liquid Extraction Based on Three-phase Formation with Perfluorosurfactant and Amine Compounds
Authors: Igarashi Shukuro , Kyuwa Tohru , Matsuura Masaya , Yotsuyanagi Takao 
Published: April 2006

Abstract
A new type of three-phase separation phenomenon was found by the charge neutralization of perfluorooctanate ion {PFOA−, CF3(CF2)6-COO−} with amylammonium ion (R-N+H3). For example, a three-phase system was formed at pH = 6.8 and [PFOA]T/[amine]T = 0.5. The partition behaviors of solutes such as water-soluble porphyrin and compounds in vivo into each liquid phase were examined.
Quantitative Extraction-Separation of Calcium and Strontium Using Cryptand [2.2.2] as a Masking Reagent
Authors: Sasaki Takayuki , Umetani Shigeo , Matsui Masakazu , Tsurubou Shigekazu 
Published: April 2006

Abstract
Cryptand [2.2.2] has been applied as an ion-size selective masking reagent with the aim of establishing a highly selective extraction-separation system. Calcium can be readily and quantitatively separated from strontium and barium in the synergistic solvent extraction with 1-phenyl-3-methyl-4-benzoyl-5-pyrazolone (HPMBP) and tri-n-octylphosphine oxide (TOPO) using 4,7,13,16,21,24-Hexaoxa-1,10-diazabicyclo-[8,8,8]-hexacosane (cryptand [2.2.2]) as a masking reagent.
Effect of Charged Conditions of Stabilizers for Cadmium Sulfide Microcrystalline Photocatalysts on Photoreduction of Carbon Dioxide
Authors: Inoue Hiroshi , Nakamura Ryoji , Yoneyama Hiroshi 
Published: April 2006

Abstract
The use of stabilizers having negative charges such as polyacrylic acid for CdS microcrystals in aqueous solutions yielded selectively formate as a photoreduction product of CO2, while positively charged stabilizers such as polyethyleneimine worked well for selective production of CO. Furthermore, it was found that the rate of photo-induced reduction of carbon dioxide was influenced by the amount of charges of the stabilizers used.
2-Step Chemical Vapor Surface Modification of Porous Glass with Fluoroalkyl-functional Silanes
Authors: Tada Hiroaki 
Published: April 2006

Abstract
Surface porous glass substrates were exposed to heptadecafluorodecyltrichlorosilane (HFTS) vapor followed by the treatment with trifluoropropyltrichlorosilane (TFTS). The resistance of the monolayer to liquid H2O was found to be better than those of the samples treated with the respective reagents, i.e., HFTS or TFTS. The coverage with the molecules in the pores were estimated from the analyses of the reflection spectra having a minimum in the visible range. These results reasonably explain the superior resistance to H2O of the sample treated with HFTS (1st step) and TFTS (2nd step).
Reduction with Samarium(0). Debromination of vic-Dibromides to Alkenes
Authors: Yanada Reiko , Bessho Kiyoshi , Yanada Kazuo 
Published: April 2006

Abstract
Three electrons from Sm(0) to Sm(III) can be available during the title reduction which was achieved in 90–95% yield with vic-dibromides such as trans-10,11-dibromodibenzosuberone, meso- and dl-1,2-dibromo-1,2-diphenylethane, ethyl 2,3-dibromo-3-phenylpropionate, 2,3-dibromo-3-phenylpropionic acid, and cholesterol dibromide. These reductions were accelerated with a catalytic amount of acid.
Practical Synthesis of Oligodehydroalanine Derivatives by Repetition of Stepwise Elongation of Serine Derivative and β-Elimination
Authors: Shin Chung-gi , Okumura Kazuo , Ito Akio , Nakamura Yutaka 
Published: April 2006

Abstract
Facile and practical synthesis of various oligodehydroalanine and its amide derivatives, which compose most of the thiostrepton peptide antibiotics, were first accomplished by repetition of the stepwise elongation of serine derivative and then β-elimination.
Bacterial Oxidation of Naphtharene to 1-Naphthol
Authors: Inoue Masami , Inoue Tomomi , Okami Mituaki , Sayama Michio , Hirai Yoshiro 
Published: April 2006

Abstract
The oxidation of naphtharene in a liquid culture was carried out in the presence of Bacillus cereus. 1-Naphthol was obtained in 11–20% yield and the selectivity of 65–77% at 28 °C and pH 7.0 after 12–24 h. The ratio of 1-naphthol to 2-naphthol was 94 : 6.
Stereochemistry of a Novel Macrodiolide Antibiotic IKD-8344
Authors: Ishida Toshimasa , In Yasuko , Nishii Masahiro , Minami Yoshinori 
Published: April 2006

Abstract
The X-ray crystal structure analysis of a novel macrodiolide antibiotic, IKD-8344, has shown a cylindrically curved molecular conformation, together with its relative configuration.
Acetonitrile Formation from Ethylene and Ammonia over Zn2+ and Cd2+ Exchanged Y-zeolites
Authors: Takahashi Nobuo , Minoshima Hiroshi , Iwadera Hiroyuki 
Published: April 2006

Abstract
Zn2+ and Cd2+ exchanged Y-zeolites are found to be active for acetonitrile formation from ethylene and ammonia. Their catalytic activities are much higher than that on Al2O3, which has been known to be an active catalyst for this reaction.
Chiral Pyridyl Alcohol-Promoted Highly Enantioselective and Rapid Addition of Dialkylzinc to Pyridinecarboxaldehydes
Authors: Ishizaki Miyuki , Hoshino Osamu 
Published: April 2006

Abstract
Optically active 1-(2-, 3-, and 4-pyridyl)propanols and 1-(3-pyridyl)ethanol were synthesized in good to high enantiomeric excesses (up to 88% e.e.) and in a short reaction time by catalyzed asymmetric addition of dialkylzinc to pyridine-2-, 3- and 4- carboxaldehydes and 6-bromopyridine-2-carboxaldehyde in the presence of tridentate chiral 2-[2,2-dimethyl-1-(2-pyridyl)propoxy]-1,1-diarylethanols.
Synthesis and Structure of the First Base-Stabilized Germylyne-Bridged Dinuclear Complex [Cp2Fe2(CO)3(μ-Ge tBu·DMAP)]OTf (DMAP = 4-(Dimethylamino)pyridine; OTf = CF3SO3)
Authors: Fujita Jun , Kawano Yasuro , Tobita Hiromi , Ogino Hiroshi 
Published: April 2006

Abstract
The germylene-bridged diiron complex Cp2Fe2(CO)3(μ-GeI tBu) reacts with DMAP in the presence of AgOTf to give the first base-stabilized germylyne-bridged complex cis-[Cp2Fe2(CO)3(μ-Ge tBu·DMAP)]OTf. The X-ray crystal structure reveals that the Fe-Ge bonds are very short (2.322(2) Å) while the Ge-N(DMAP) bond is unusually long (1.992(12) Å).
STM Observation and Its lmaging Mechanism of Alumina and Platinum-on-Alumina Model Catalyst Surfaces
Authors: Komiyama Masaharu , Kurokawa Hiroyuki 
Published: April 2006

Abstract
Scanning tunneling microscopy (STM) images of Pt ultrafine particles dispersed on a thin aluminum oxide film were obtained for the first time. The Pt/Al2O3 model catalyst consists of aluminum oxide prepared by vacuum-depositing aluminum metal on a native-oxide-covered single crystal silicon surface and air-oxidized, and Pt metal particles vacuum-deposited on this alumina surface. The mechanism of STM imaging for this system was investigated.
Preparation and Properties of 3,4,7,8-Tetragermacycloocta-1,5-diyne and Related Compounds
Authors: Komoriya Haruhiko , Kako Masahiro , Nakadaira Yasuhiro , Mochida Kunio , Tonogaki-Kubota Mari , Kobayashi Tsunetoshi 
Published: April 2006

Abstract
Permethylated 3,4,7,8-tetragermacycloocta-1,5-diyne (1) and 3,4-disila-7,8-digermacycloocta-1,5-diyne (2) were prepared. The photoelectron spectra of 1 and 2 were compared with that of their tetrasila-analog 3. The first ionization potential decreases in the order of 3, 2, and 1. Charge-transfer spectra of 1-teracyanoethylene (TCNE), 2-TCNE and 3-TCNE complexes were observed. Only 1 was oligomerized in the presence of TCNE to give its higher homologues. All 1, 2, and 3 cycloadded to 2,3-dichloro-5,6-dicyano-1,4-benzoquinone to give the corresponding 1 : 1 adducts in a [2 + 6] manner.
Preparation of Molecular Assemblies of Porphyrin-Linked Alkanethiol on Gold Surface and Their Redox Properties
Authors: Akiyama Tsuyoshi , Imahori Hiroshi , Sakata Yoshiteru 
Published: April 2006

Abstract
Self-assembled monolayer of porphyrin-linked alkanethiol on gold surface was prepared and the structure was characterized on the basis of X-ray photoelectron spectroscopy (XPS), fluorescence spectra, and cyclic voltammetry (CV). Monolayer with zinc porphyrin chromophore was found to be electroactive in organic solvent.
Preparation of the 11-Molybdogermanate(IV) Complex
Authors: Katano Hajime , Osakai Toshiyuki , Himeno Sadayuki , Saito Atsuyoshi 
Published: April 2006

Abstract
An ion transfer voltammetric study revealed the presence of the 11-molybdogermanate anion in the aqueous Mo(VI)–Ge(IV) system. The heteropolyanion was isolated as a tetrabutylammonium (n-Bu4N+) salt, being characterized by the IR spectrum and the redox behavior.
Conformation Analysis of Sialyl LeX by Molecular Mechanics
Authors: Hirayama Noriaki , Yoda Nobuyuki , Nishi Tatunari 
Published: April 2006

Abstract
The conformation of a tetrasaccharide Sialyl LeX was investigated by molecular mechanics calculations. The initial models were constructed by docking X-ray structures of the component monosaccharides through glycosidic bonds and they were optimized by molecular mechanics. Two different docking modes were applied. It was shown that the docking mode influence the resultant stable conformations significantly, but the most stable conformation was independent of the mode.
Europium-Catalysis for the Mono-Oxygenation of Alkanes in the Liquid Phase
Authors: Yamanaka Ichiro , Akimoto Takashi , Otsuka Kiyoshi 
Published: April 2006

Abstract
EuCl3 was the most active catalyst for the mono-oxygenation of alkanes (hexane (2.6% yield), cyclohexane (3.8% yield), and adamantane (66% yield)) with O2 in the liquid phase at ambient temperature among the rare earth salts tested. The reactivity of the active oxygen species generated on EuCl3-catalytic system is different from those of Gif-Orsay-Texas, metal-porhyrin and Fenton systems.
Photoelectron Spectroscopy of AlS− Diatomic Anion
Authors: Nakajima Atsushi , Taguwa Tetsuya , Nakao Kojiro , Hoshino Kuniyoshi , Iwata Suehiro , Kaya Koji 
Published: April 2006

Abstract
Photoelectron spectra of AlS− radical were measured using a magnetic bottle electron spectrometer. Electron affinity of AlS was determined to be 2.60(3) eV, and a new electronic excited state, A′2Π, was found 0.4 eV above the AlS ground state, which is consistent with theoretical calculations.
Examination of Dempsey’s Rule on the Si,Al Distribution in Zeolite Frameworks
Authors: Sato Mitsuo , Maeda Koji , Hirasawa Keniti 
Published: April 2006

Abstract
In order to examine the validity of Dempsey’s criterion on the Si,Al distribution in zeolite frameworks, a new method based on the node index and the downhill simplex has been introduced. The method has been applied to the synthetic zeolites ZK–19(PHI) and Linde W(MER). The results confirm the validity of Dempsey’s rule.
A Practical and Efficient Synthesis of Fluorinated Pyrethroids. cis-3-(2-Chloro-3,3,3-trifluoro-1-propenyl)-2,2-dimethylcyclopropanecarboxylates
Authors: Nishida Mayumi , Fuchikami Takamasa , Kondo Kiyosi 
Published: April 2006

Abstract
A practical and efficient route to fluorinated pyrethroids has been developed which involves the selective formation of the cis cyclopropane ring using intramolecular alkylation of the haloaldehyde and a novel transformation of the aldehydes to the corresponding esters via the cyanohydrins.
Control of a Photochemical Reaction by Manipulating the Electron Spins of a Transient Radical Pair as Evidenced by HPLC Analysis
Authors: Okazaki Masaharu , Konishi Yoshinari , Toriyama Kazumi 
Published: April 2006

Abstract
Product analysis was made for the photoreduction of anthraquinone in SDS micellar solution under the various magnetic fields with a simultaneous microwave irradiation. It has been confirmed that control of a chemical reaction is possible by inducing the ESR transitions of the intermediate radical pair.
Electron Transfer on Electrode Modified with Keratin Membranes Containing Manganese Porphyrins
Authors: Iida Kouji , Nango Mamoru , Hikita Masaya , Hattori Ayako , Yamashita Keiji , Yamauchi Kiyoshi , Tsuda Kazuichi 
Published: April 2006

Abstract
Enhanced electron transfer between porphyrins in membranes cast on a glassy carbon electrode was observed especially in hydrophilic keratin membranes containing manganese protoporphyrin dimethyl esters (MnPPDME). An imidazole derivative played an important role on the electron transfer in hydrophobic S-cyanoethylated keratin membranes containing MnPPDME.
Stabilizing Effect of Diphytanylphosphate on Dipalmitoylphosphatidylcholine Bilayer Membrane
Authors: Nishikawa Naoyuki , Mori Hideto , Ono Mitsunori 
Published: April 2006

Abstract
A novel surfactant having two isoprenoid chains, diphytanylphosphate (1), was synthesized. Vesicles composed of dipalmitoylphosphatidylcholine (DPPC) and 1 exhibit high barrier effect on the leakage of its contents and resistance to the aggregation.
Preparation of Molybdenum and Tungsten Diazoalkane-Aminocarbene Complexes cis, trans-[MX2(NN=CMePh){=C(Me)NHBut}(PMe2Ph)2] (M = Mo, W; X = Cl, Br) from Dinitrogen Complexes cis-[M(N2)2(PMe2Ph)4]
Authors: Harada Yuji , Aoshima Takayuki , Mizobe Yasushi , Oshita Hiroyuki , Hidai Masanobu 
Published: April 2006

Abstract
Molybdenum and tungsten diazoalkane-isocyanide complexes cis, trans-[MX2(NN=CMePh)(CNBut)(PMe2Ph)2] (M = Mo: X = Cl; M = W: X = Cl, Br), derived from cis-[M(N2)2(PMe2Ph)4], reacted with AlMe3 to give diazoalkane-aminocarbene complexes cis,trans-[MX2(NN=CMePh){=C(Me)NHBut}(PMe2Ph)2] (3) after hydrolysis, whose structure has been determined by an X-ray analysis for 3a (M = W, X = Cl).
A New Selective Synthesis of Aryl 2,2-Diethylbutyl Ethers
Authors: Masada Hiromitsu , Shimanaka Hiroyuki , Hamazaki Hideki , Tokuda Takako , Kawabata Chikako 
Published: April 2006

Abstract
The nucleophilic substitution reactions of hindered 2,2-diethylbutyl methanesulfonate with potassium aryloxides were carried out in dimethyl sulfoxide at higher temperatures. New unrearranged hindered ethers were readily obtained in excellent yields as the desired products.
Supramolecular Structures in Solid State AgCN–Cd(CN)2–(4-Picoline) Complexes. An Interwoven Double Network of [Cd{Ag(CN)2}2]n in [trans-Cd(4-Mepy)2{Ag(CN)2}2]·(4-Mepy) and a Linear Chain of [–Cd–NC–Ag(CN)Ag–CN–]n in [Cd(4-Mepy)4{Ag2(CN)3}][Ag(CN)2]
Authors: Soma Takayoshi , Iwamoto Toschitake 
Published: April 2006

Abstract
The title complexes in the compositions 2Ag(CN)·Cd(CN)2·3(4-Mepy) and 3Ag(CN)·Cd(CN)2·4(4-Mepy) crystallize from the same mother solution with the supramolecular structures remarkably different from each other. The former is a clathrate accommodating a guest 4-Mepy in the interwoven double network host. The latter host is comprised of –Cd(4-Mepy)4–NC–Ag(CN)Ag–CN– linear chains among which discrete [Ag(CN)2]− anions are incorporated.
Novel Amphoteric 2,5-Furoquinonoid-Containing p-Terphenoquinone Analogues Giving Both a Stable Radical Anion and a Stable Radical Cation
Authors: Takahashi Kazuko , Gunji Atsushi , Akiyama Kimio 
Published: April 2006

Abstract
Novel p-terphenoquinone analogues incorporating a central dihydrofurandiylidene skeleton have been synthesized. These quinones gave a stable radical cation and a stable radical anion on one-electron redox reactions showing an amphoteric property even though they do not contain any sulfur atom as an integral component. The radical cation and the radical anion of the tetra-t-butyl derivative have been characterized by EPR spectroscopy.
Preparation and Characteristics of Pyridyl and 4,5-Dihydroimidazolyl Groups Bonded Silica Gels as New Column Packing Materials for Separation of Metal Chelates by High Performance Liquid Chromatography
Authors: Suzuki Tomohiro , Tsunoda Kin-ichi , Akaiwa Hideo 
Published: April 2006

Abstract
Pyridyl and 4,5-dihydroimidazolyl groups bonded silica gel packed columns were newly prepared and applied to high performance liquid chromatographic analysis of coordinatively saturated as well as unsaturated metal chelates, i.e., cobalt(III) and copper(II) acetylacetonates, respectively. The separation of those metal chelates may be caused by coordination interaction between the central metals and the immobilized neutral ligands.
Reactions of Selenurane [10-Se-4 (C4)] with Alcohols, Thiols and Selenol. A Quest for Formation of a New a-Selenurane [10-Se-4 (C3O)], [10-Se-4 (C3S)] or [10-Se-4 (C3Se)]
Authors: Sato Soichi , Furukawa Naomichi 
Published: April 2006

Abstract
Bis(2,2′-biphenylylene)selenurane readily reacts with various alcohols, phenols, thiols and selenol to give ligand coupling or ipso-substitution products under mild conditions via a two-step mechanism involving a σ-selenurane [10-Se-4 (C3O)], [10-Se-4 (C3S)] and [10-Se-4 (C3Se)] or corresponding selenonium salts as intermediates.
An Organic Ferromagnet with a Tc of 0.4 K. 4-(p-Phenylbenzylideneamino)-2,2,6,6-tetramethylpiperidin-1-oxyl
Authors: Ishida Takayuki , Tsuboi Hidenori , Nogami Takashi , Yoshikawa Hajime , Yasui Masanori , Iwasaki Fujiko , Iwamura Hiizu , Takeda Naoya , Ishikawa Masayasu 
Published: April 2006

Abstract
The polycrystalline sample of the title radical has a positive Weiss constant of 0.63 K. The ac susceptibility measurements indicated a ferromagnetic phase transition at about 0.4 K. The magnetization measured at 80 mK (below Tc) showed a characteristic curve of a ferromagnet with a small hysteresis. The X-ray crystal structure analysis at room temperature revealed a two-dimensional network of the N–O sites (O···O distances are 5.96 and 6.09 Å) with an inter-sheet distance of 14.2 Å.
Green and Orange Crystalline Forms of [VO{N-salicylidene-N′-3-ethoxysalicylidene-(R,R)-1,2-cyclohexane-diamine}], Separation of the Diastereomeric Pair, and Isomerization between Them in the Solid State
Authors: Kojima Masaaki , Nakajima Kiyohiko , Tsuchimoto Masanobu , Tanaka Miki , Suzuta Tetsuya , Yoshikawa Yuzo , Fujita Junnosuke 
Published: April 2006

Abstract
A pair of diastereomers, I and II, of the titled complex were separated by liquid chromatography, and each of them crystallized in two different colors, green and orange. I(green) and II(green) were assigned to a mononuclear square pyramidal structure, while I(orange) and II(orange) to a polynuclear linear chain structure. The orange complexes turned green by heating at 195 °C in a few minutes. All of the four complexes undergo isomerization at 195 °C in the solid state to give an equilibrium mixture, I : II ≈ 1 : 1.
Novel Reduction of 2,6-Di-t-butyl-p-quinols with Sodium Borohydride
Authors: Nishinaga Akira , Kojima Shinya , Mashino Takahiro , Maruyama Kazushige 
Published: April 2006

Abstract
Reduction of 2,6-di-t-butyl-p-quinols with NaBH4 results unexpectedly in the regio- and stereoselective formation of the corresponding dihydro-p-quinols. The novel reduction occurs via a quinoxyborohydride anion intermediate, which regulates the stereochemistry of the 4- and 6-positions in the products. Aromatization of the products is blocked by the t-butyl groups.
Extended Brigham Model for Residual oil Saturation Measurement by Partitioning Tracer Tests
Authors: Tang Joseph S. 
Published: April 2006

Summary
Brigham's model has been used extensively in the petroleum industry for thedesign and interpretation of interwell tracer tests. The model is based oncorrelation and has included physical dispersion as an input parameter. Inspite of its limitations, the model is useful in estimating layerheterogeneity, layer distribution, permeability contrast, and dispersion in thereservoir. However, the model can only handle nonpartitioning tracers thathave no solubility in oil. With the advancement in partitioning tracertechnology and interpretation technique, interwell partitioning tracer testinghas gained its popularity, especially in China,1 for determining residual oilsaturation, Sorw, between wells. Partitioning tracer testing also findsits application in environmental protection, where tests are routinely run todetermine the amount of nonaqueous liquid phase nonaqueous phase liquid (NAPL)trapped underground due to spill or seepage. While sophisticated streamline orfinite difference simulators have been increasingly used to determine Sorw distribution from the tracer production data, the simple semiquantitative modelstill has its merits in providing a direct, unambiguous estimate of average Sorw along the tracer flow path. This paper broadens the scope of theoriginal Brigham's model by incorporating partitioning tracers into the modelusing a chromatographic transformation technique. By matching the partitioningand nonpartitioning tracer curves, Sorw can be determined by layers. The extended Brigham model was applied to the Ranger oilfield multiple tracer test, and the residual oil saturation determined compared favorably with thoseobtained by chromatographic transformation method and numerical simulation.