bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Crystal Structures of Bis(cis-1,3-diaminocyclohexane)palladium(II) Chloride and Its Platinum(II) Analogue
Authors: Kamisawa Keiko , Matsumoto Keiji , Ooi Shun’ichiro , Kuroya Hisao , Saito Reiko , Kidani Yoshinori 
Published: July 2006

Abstract
The structure of bis(cis-1,3-diaminocyclohexane) palladium(II) chloride has been determined from X-ray diffraction data collected by the counter method. The crystal is orthorhombic with space group Pnnm, a=17.728(5), b=6.418(4), c=6.914(2) Å, and Z=2. The crystal structure has been determined by Patterson and Fourier techniques and refined by a least-squares method to R=0.026 for 1151 independent reflections for which Fo2&gt;3σ(Fo2). The Pd atom has a planar coordination of 4N atoms and the complex cation has a crystallographically imposed C2h symmetry, the two cis-1,3-diaminocyclohexane ligands being related to each other by a two fold axis. The six-membered chelate ring (Remark: Graphics omitted.) is of the envelope conformation. The structural features of the ligating cis-1,3-diaminocyclohexane have been described. The crystal of bis(cis-1,3-diaminocyclohexane)platinum(II) (orthorhombic, a=17.727(8), b=6.371(3), c=6.965(2) Å) was found to be isomorphous with that of the palladium analogue.
Constituents of the Essential Oil of Chrysanthemum japonense. Nojigiku Alcohol and Its Acetate
Authors: Uchio Yasuto 
Published: July 2006

Abstract
The essential oil of Chrysanthemum japonense has been analyzed to isolate a new monoterpenoid named nojigiku alcohol together with its acetate, the structure of which has been elucidated as (5R)-2,2-dimethyl-3-methylenebicyclo[2.2.1]heptan-5-ol. In addition, fifteen monoterpenoids including (+)-α-pinene, (+)-camphene, β-pinene, sabinene, 1,8-cineole, p-cymene, filifolone, (+)-chrysanthenone, (+)-camphor, (+)-borneol, (−)-cis-and (+)-trans-chrysanthenyl acetate, cis- and trans-carveyl acetate, (+)-bornyl acetate and nine sesquiterpenoids including α-copaene, β-elemene, β-caryophyllene, germacrene-D, γ-cadinene, calamenene, β-caryophyllene oxide, T-muurolol and α-cadinol were identified in the essential oil.
Carboxylation of Olefins with Carbon Monoxide Using Various Strong Acids–H2O–Group 1B Metal Carbonyl Catalyst Systems
Authors: Yoneda Norihiko , Fukuhara Tsuyoshi , Takahashi Yukio , Suzuki Akira 
Published: July 2006

Abstract
Carboxylation of 2,4,4-trimethyl-1-pentene and 1-octene with carbon monoxide was studied in the presence of various strong acids–H2O–Cu(I) carbonyl catalyst systems in an attempt to find a practical method for the preparation of carboxylic acids. The reaction takes place smoothly at room temperature to give tertiary acids in higher yields than that with the use of sulfuric acid. The procedure is preferable for the ready separation of products from the catalyst layer without quenching by water.
Modification of Aminocyclitol Antibiotics. 6. Preparation of 5-Deoxykanamycin B
Authors: Suami Tetsuo , Nishiyama Shigeru , Ishikawa Yasuhide , Umemura Eijiro 
Published: July 2006

Abstract
Aminocyclitol antibiotic kanamycin B has been modified as regards the aminocyclitol moiety by removing a hydroxyl group on C-5. 5-Deoxykanamycin B thus obtained was tested against several microorganisms. The structure of 5-deoxykanamycin B was established by mass and 13C NMR spectrometry. 5,6,3′,4′-Tetradeoxyneamine was prepared as a reference compound for 13C NMR spectrometry.
Synthesis of 11-Methyl- and 11,11-Dimethylprostaglandins via the Wittig Reaction of α-Dienol
Authors: Inoue Kenji , Ide Junya , Sakai Kiyoshi 
Published: July 2006

Abstract
The key intermediates for 11-methyl- and 11,11-dimethylprostaglandins corresponding to Corey’s lactone were synthesized via the Wittig reaction of dimethyl 2-substituted-4,5-dioxocyclopentane-1,3-dicarboxylate with stable ylides. 11,11-Dimethylprostaglandin E2 was then synthesized.
Coordination of Alkanethiolate Anion to Ruthenium(II) Carbonyl Complex of Octaethylporphine: Model for Carbonyl Adduct of Cytochrome P-450
Authors: Ogoshi Hisanobu , Sugimoto Hiroshi , Yoshida Zen-ichi 
Published: July 2006

Abstract
Absorption, infrared, and 1H-NMR spectra of the ruthenium(II) octaethylporphine carbonyl complex [Ru(II)OEP·CO] were studied in the presence of alkanethiolate anion (−SR) as a model system for the reduced cytochrome P-450 carbonyl complex. The 1H-NMR spectra reveal that alkanethiolate anions coordinte toa the central metal atom of Ru(II)OEP·CO as the sixth ligand. The hexaccordinated complex [Ru(II)OEP·CO·−SR] has anomalous features as compared with the pentacoordinated complex [Ru(II)OEP·CO]: (1) the Soret band is splitted into two peaks, one in the near UV 363–365 nm region and the other in the 419–428 nm region, (2) the carbonyl stretching frequency is shifted by 25 cm−1 to lower wave number, (3) the proton signals of porphyrin ligand are shifted to higher magnetic field. Similarity of absorption and infrared spectra of the hexacoordinated complex to those of the reduced cytochrome P-450 carbonyl complex supports the axial ligation of the cysteinate to the central iron atom of the heme-proteins. The low wave number shifts of carbonyl stretching vibration and high field shifts of protons in the 1H-NMR spectra suggest the charge transfer interaction from 3p lone pair electrons of sulfur atom of alkanethiolate anion to the central metal and/or the porphyrin ligand.
The Synthesis of Neobavaisoflavone and Related Compounds
Authors: Nakayama Mitsuru , Eguchi Shizuko , Hayashi Shûichi , Tsukayama Masao , Horie Tokunaru , Yamada Toshihide , Masumura Mitsuo 
Published: July 2006

Abstract
The condensation of 7-benzoyloxy-4′-hydroxyisoflavone with 2-methyl-3-buten-2-ol gave 7-benzoyloxy-4′-hydroxy-3′-(3-methyl-2-butenyl)isoflavone. The hydrolysis of the alkylated isoflavone with dilute alkali afforded neobavaisoflavone [7,4′-dihydroxy-3′-(3-methyl-2-butenyl)isoflavone], which was then converted into isoneobavaisoflavone on heating with formic acid. 7-Benzyloxy-4′-hydroxyisoflavone was condensed with 2-methyl-3-buten-2-ol to give a chroman derivative, which was then converted into isoneobavaisoflavone by hydrolysis. 3′-(3-Methyl-2-butenyl)-5,7,4′-trihydroxyisoflavone was also synthesized from 7-benzoyloxy-5,4′-dihydroxyisoflavone in a similar manner.
1,3-Dipolar Cycloadditions to Bicyclic Olefins. III. The Effects of Aromatic Solvents on the exo/endo Product Ratios for the 1,3-Dipolar Cycloadditions of Nitrile Oxides to Norbornadienes
Authors: Taniguchi Hisaji , Imoto Eiji 
Published: July 2006

Abstract
When no hydrogen-bonded complex is formed between the precursors (α-chloro-α-hydroxyiminoacetophenone (5a) and α-chloro-α-hydroxyiminoacetone (5b)) of nitrile oxides (phenylglyoxylonitrile oxide (2a) and methylglyoxylonitrile oxide (2b)) and norbornadienes(2,3-bis(methoxycarbonyl)norbornadiene (1) and norbornadiene (6)) in solvents, the exo/endo product ratios for the cycloadditions of 2a and 2b to 1 or 6 increase or decrease with increasing temperature. When the hydrogen-bonded complex between 5a and 1 is formed in a solvent cage, however, the ratio keeps a constant value until the temperature is elevated up to a certain temperature, at which the ratio jumps up. After the jumping, the ratio has another constant value, regardless of the temperature. Similar results are obtained in the cycloaddition of 2b to 1 in the aromatic solvents used.
Electrolytic Dissolution and Deposition of Overpotentials of Tantalum in KCl Melts
Authors: Nakagawa Ippei 
Published: July 2006

Abstract
As part of electrochemical studies on tantalum, the electrolytic dissolution and deposition of solid tantalum in molten salt were studies by measuring its overpotentials in a steady state. The measurements were carried out using the dc current polarization technique in the concentration range of 2.00×10−4–2.79×10−1 mole fraction at temperatures between 775 and 875 °C. The kinetic parameters (the exchange current densities, the transfer coefficients, the kinetic averaged valences, and the apparent activation energies) were determined for the anodic and the cathodic reactions in the Tafel region. The over-all reaction was indicated as:
(m1+m2)Ta2++(2m1−2m2)e\ightleftarrowsm1Ta0+m2Ta4+
The Ta2+ ion was previously supposed not to form a complex ion; the Ta4+, however, was a complex ion which decomposed at above 850 °C.
Pore Structure of Iron Oxides
Authors: Nagao Mahiko , Yokota Yasuhiro , Morimoto Tetsuo 
Published: July 2006

Abstract
The pore structure of iron oxides, subjected to oxidation into α-Fe2O3 as well as reduction into Fe3O4, was investigated by means of the t-method. The results show that the reduction is accompanied by the formation of slit-shaped pores, width 14 Å, open at both ends.
Syntheses and Properties of gem-Diolatotriarylantimony(V)
Authors: Ouchi Akira , Ebina Fujio , Uehiro Takashi , Yoshino Yukichi 
Published: July 2006

Abstract
Titled compounds of the general formula R3Sb(R′R″CO2) have been prepared, where R=phenyl, p-tolyl or p-chlorophenyl, R′,R″=CF3,CF3; CF3,H; or CCl3, H. From the infrared spectra and 1H-NMR data, the gem-diolato group appears to bond to the antimony bidentately through two oxygen atoms, as in the 1,1,1-trifluoro-4-oxo-2,2-pentanediolato complex of triarylantimony(V).
Synthesis and Characterization of Copper Complexes with Schiff Bases Derived from 2-Thiophenealdehyde and Alkylamines
Authors: Kuma Hiro , Motobe Kyoji , Yamada Shoichiro 
Published: July 2006

Abstract
Copper(I) and copper(II) complexes with Schiff bases derived from 2-thiophenealdehyde and alkylamines were prepared. Probable structures of these complexes are discussed mainly on the basis of electronic and infrared spectra and magnetism.
The Configuration of 17-Ethyl-3β-hydroxyetiojerva-5,12,17(20)-trien-11-one and Related Compounds
Authors: Murai Akio , Sasamori Hiroshi , Masamune Tadashi 
Published: July 2006

Abstract
The title compound, one of the most important starting materials for the synthesis of C-nor-D-homosteroid and normal steroid hormones, was determined to possess (E)-configuration at the 17,20-double bond on the basis of chemical and spectral evidence.
Catalytic Activities of Salicylaldehyde Derivatives. V. Syntheses and Catalytic Activities of Some Trimethylammonio Derivatives of Salicylaldehyde in the Racemization of l-Glutamic Acid
Authors: Ando Makoto , Emoto Sakae 
Published: July 2006

Abstract
(3-Formyl-2-hydroxyphenyl) trimethylammonium (2) and (3-formyl-4-hydroxyphenyl)trimethylammonium salts (3) have been prepared from the corresponding 3- and 5-nitrosalicylaldehydes via the 3- and 5-(dimethylamino)salicylaldehydes. The catalytic activities of 2, 3, and the (2-formyl-3-hydroxyphenyl)trimethylammonium salt have been studied at pH 10 and at 80 °C in the presence of copper(II) ion.
Oxidation of Thujopsene with Thallium Triacetate in Acetic Acid
Authors: Sekizaki Haruo , Ito Masaaki , Inoue Shoji 
Published: July 2006

Abstract
Oxidation of thujopsene with thallium triacetate in acetic acid at room temperature gave a stereospecifically ring-contracted ketone (3) in 76% yield, whereas oxidation at 50 °C afforded an allylic oxidation product in 72% yield. The configuration of 3 was estimated by the NMR spectrum of a compound derived from it.
A New Route to o-Methylthiomethylated Phenols by Use of S,S-Dimethylsulfilimines
Authors: Yamamoto Tamotsu , Okawara Makoto 
Published: July 2006

Abstract
As convenient intermediates to introduce methyl groups into the o-positions of phenols, o-methylthiomethylphenols (o-MTM-phenols) were prepared in high selectivity and moderate yield by the reaction of phenols with sulfilimines such as S,S-dimethyl-N-(2,4-dinitrophenyl)- and S,S-dimethyl-N-tosylsulfilimines.
ESR Study on Molecular Alignment of Various Nitroxides in a Nematic Liquid Crystal
Authors: Tanaka Hisao , Kuwata Keiji 
Published: July 2006

Abstract
Various nitroxides with characteristic molecular shapes were studied by ESR spectroscopy to determine the relation between the molecular shape and the ordering in the nematic phase. The hyperfine splitting shifts upon going from the nematic to the isotropic phase and the relative widths of the nitroxyl nitrogen hyperfine lines were examined. Together with an estimate of the molecular dimensions, these results revealed that the ordering properties in three types of nitroxides(each of which has its elongated molecular axis along one of the three principal axes of the nitroxyl nitrogen dipolar tensor) can all be understo od well in terms of the slender molecular shape. This led to the deduction that the Saupe-type anisotropic induced dipole-dipole interaction between the overall molecule of nitroxide and the nematic molecule is superior to the local interaction between the substituent moieties of nitroxide and nematic molecule. The dipolar anisotropy of the β-proton of nitroxide was evaluated to be 3 G.
Far-infrared Reflection Spectra, Raman Spectra and Lattice Vibrations of CsMgCl3 and CsCaCl3
Authors: Morioka Yoshiyuki , Nakagawa Ichiro 
Published: July 2006

Abstract
Far-infrared reflection spectra of single crystals of CsMgCl3 and CsCaCl3 have been measured, and the frequencies of transverse and longitudinal modes of infrared active vibrations have been determined using Kramers-Kronig relation. For CsMgCl3 a measurement of polarized Raman spectra has been made. A normal coordinate analysis of the optically active lattice vibrations has been performed, in which the rigid ion model for long range Coulomb interactions and the central force field including the 1st differential coefficients of the pair-wise potential functions have been used. The obtained short range force constants K(Mg–Cl) and K(Ca–Cl) are 0.715 and 0.63 mdyn/Å, respectively, which indicate that some amount of covalent character exists in the Mg–Cl and Ca–Cl bonds.
The Application of Mathematical Programming in Theoretical Chemistry. I. Saddle-point-search Method Applied to a H3 Molecule
Authors: Yoneda Yukio 
Published: July 2006

Abstract
A new method to find the activated state of a reaction without preparing its potential energy surface was proposed and proved useful with the example of a H3 molecule. The first and the second derivatives of the total energy, with respect to every cartesian coordinate of a H3 molecule, were calculated by means of a perturbation method employing a modified EHMO. First, the bottom of the valley in the potential energy surface leading to the saddle point is sought with the aid of the quadratic approximation on the superplane on which the maximum curvature at the representative point lies. Second, the ascending path is determined to be the reverse of the steepest decending path according to the principle of microscopic reversibility. By repeating these procedures, the activated state was found without preparing the potential energy surface. The classical activation energy thus found was 8.8 kcal/ mol, which is in good agreement with the experimental values.
Absolute Intensity Measurement of Infrared Absorption by the Use of CO2 Laser Source
Authors: Suzuki Tetsuo , Fujiyama Tsunetake 
Published: July 2006

Abstract
The absolute infrared absorption intensities have been measured for the QR0(0) line (ν3 fundamental) of methyl fluoride and the RR8(9) line (ν6 fundamental) of methyl iodide by the use of CO2 laser lines of P(16) and P(8), respectively. The observed intensities, Γ, were: 12500±4300 cm2·mol−1 for the ν3 band of methyl fluoride and 1040±40 cm2·mol−1 for the ν6 band of methyl iodide.
1H and 19F NMR Study of p-Chlorobenzylidyne Trifluoride Partially Oriented in a Nematic Phase
Authors: Sugino Yuuji , Takahashi Kensuke 
Published: July 2006

Abstract
The 1H and 19F NMR spectra of p-chlorobenzylidyne trifluoride dissolved in a nematic phase of EBBA have been analyzed, and the structure of the proton and fluorine skeleton has been determined. No presice information about the anisotropy of the indirect F-F coupling can be given.
Application of Gel Chromatography to the Determination of the Stability Constants of a Magnesium Complex with Diphosphate
Authors: Miyajima Tohru , Ohashi Shigeru 
Published: July 2006

Abstract
Hummel-Dreyer’s method was examined for its applicability to inorganic complexes, and a modified method was proposed. A sample solution containing magnesium and diphosphate was eluted with magnesium chloride solution on a gel column. The change of magnesium concentration in an effluent was measured with an atomic absorption detector. From the peak area of the eluted complex the stability constants (1g β1) at I=0.1 and 25 °C were evaluated to be 5.57 in tetramethylammonium chloride solution and 5.06 in sodium perchlorate solution. In the modified method the total magnesium concentration in a sample solution is made to be much higher than that in an eluent. This enables one to shorten the elution time.
Kinetics of the Oxidative Addition of Hydrogen to Chloro(acrylonitrile)bis(triphenylphosphine)rhodium(I) in Benzene
Authors: Ohtani Yoshimi , Yamagishi Akihiko , Fujimoto Masatoshi 
Published: July 2006

Abstract
The reaction between chloro(acrylonitrile)bis(triphenylphosphine)rhodium(I) and hydrogen was studied by the stopped-flow method under an anaerobic condition. A solution of RhCl(CH2=CHCN)(PPh3)2 was mixed with a benzene solution containing hydrogen under the condition of [Rh]&lt;[H2]0&lt;[CH2=CHCN]. A fast decrease in the absorbance was followed by a slow increase in the absorbance, until finally the absorbance returned to the initial value. It was proved that the faster reaction was the oxidative addition of hydrogen to RhCl(CH2=CHCN)(PPh3)2; RhCl(CH2=CHCN)(PPh3)2+H2\oversetk34\undersetk43\ightleftharpoonsRhClH2(CH2=CHCN)(PPh3)2. The slower reaction was the process in which hydrogen was consumed in the course of the hydrogenation of acrylonitrile and RhCl(CH2=CHCN)(PPh3)2 was reproduced. The values of the rate constants were evaluated to be k34≥7.8×103 mol−1 dm3 s−1 and k43≤53 s−1.
Annihilation of Positron and Positronium in Benzene Solutions of Lanthanoid Dipivaloylmethanates
Authors: Endo Kazutoyo , Furukawa Michiaki , Yamatera Hideo , Sano Hirotoshi 
Published: July 2006

Abstract
The lifetime of ortho-positronium(o-Ps) was measured in benzene solutions of several lanthanoid dipivaloylmethanates. None of the paramagnetic lanthanoid dipivaloylmethanates, Ln(dpm)3 (Ln=Eu, Gd, Tb, Dy, Ho, Er, and Yb), accelerated the o-Ps decay (τ2=3.2 ns). On the other hand, diamagnetic tetrakis(dipivaloylmethanato)cerium(IV), Ce(dpm)4, shortened the lifetime of o-Ps (τ2=1.9 ns for a 0.02 mol dm−3 solution in benzene). These results clearly indicate that the acceleration of the o-Ps decay by lanthanoid complexes occurs through the oxidation mechanism, not through the spin-conversion mechanism. This confirms the previous conclusion from experiments with 3d transition-metal β-diketonates that the oxidation of o-Ps is mainly responsible for the rapid o-Ps decay caused by the Fe(III) and Mn(III) complexes. Factors which influence the intensity and decay rate of o-Ps are discussed in connection with the experimental results.
Syntheses and Thermal Properties of Some Bivalent Transition Metal Complexes with 1,4-Diazabicyclo[2.2.2]octane
Authors: Yokobayashi Hiroko , Nagase Kenzo , Sone Kozo 
Published: July 2006

Abstract
New five-coordinate complexes [MCl3L(H+L)], where M=Mn(II), Fe(II), Co(II), and Ni(II) and L=1,4-diazabicyclo[2.2.2]octane, were prepared in anhydrous ethanol. On being heated in the solid state, they begin to lose the non-charged ligand (L) in the order Co(147 °C) &lt;&lt;Fe(184 °C)&lt;Ni(190 °C)&lt;Mn(196 °C) and are transformed into the tetrahedral complexes [MCl3(H+L)]. The thermal stability of the five-coordinate complexes depends markedly on the nature of M(II). The octahedral complex [NiCl4(H2O)2]H2L·H2O obtained from an aqueous solution shows a series of complicated color and structural changes on heating according to step-wise decomposition: [NiCl4(H2O)2]H2L·H2O (greenish yellow, octahedral)→[NiCl4]H2L(light blue, tetrahedral)→[NiCl3(H+L)](cobalt blue, tetrahedral)→[NiCl2L1⁄2](reddish brown, probably square-pyramidal)→NiCl2(yellow, octahedral).
Derivatographic Studies on Transition Metal Complexes. XX. Thermal Electron Transfer Reactions of Cobalt(III) Complexes Containing Phenylbiguanide in the Solid Phase
Authors: Ihara Yoshinori , Uehara Akira , Tsuchiya Ryokichi , Kyuno Eishin 
Published: July 2006

Abstract
The following six cobalt(III) complexes containing phenylbiguanide were prepared and the thermal reactions were followed both isothermally and non-isothermally (derivatographically) in the solid phase: trans-[Co(A)2(phbgH)2]X3·n2O, where A denotes volatile ligands such as NH3, CH3NH2 or C5H5N; phbgH denotes 1-phenylbiguanide, X chloride or bromide ion; and n is 2 or 3. From the electronic, IR and far-IR spectra and magnetic susceptibilities of these complexes before and after heating, the products obtained by evolving volatile ligands were found to be uniform bivalent cobalt complexes without rupture of the bonds of phbgH to cobalt in spite of the reduction of central cobalt(III) ion, except for the complexes containing ammonia. The reaction seems to be caused by the electron transfer from the coordinated phbgH to cobalt, not from the outer-sphere anions.
Reactions of Alkyl Diphenylphosphinates and Related Thio Esters with Some Nucleophiles. SN2 (S) Reaction and Wittig Type Rearrangement
Authors: Goda Koshiro , Okazaki Renji , Akiba Kin-ya , Inamoto Naoki 
Published: July 2006

Abstract
Reactions of alkyl diphenylphosphinates Ph2P(=X)YCHR1R2 (X, Y=O,S) with organolithiums and Grignard reagents afforded different types of products depending on the combination of X and Y. When Y=O, the reagents (R3M) mainly attacked the phosphorus atom to give Ph2P(=X)R3 and R1R2XCHO− irrespective of X, while, when X=Y=S, the reaction occurred exclusively at the ester sulfur atom, SN2(S), to give R3SCHR1R2 and [Ph2PS]−. When the X=O and Y=S, a Wittig type rearrangement of a carbanion [Ph2P(=O)SCR1R2]− was observed along with attacks on the phosphorus (major) and the sulfur (minor) atoms. Reactions with some other nucleophiles (hydride, amide and alkoxide ions) are also described.
Aromatic Nucleophilic Substitution. X. Confirmation of the Anionic σ Complex in the Base-catalyzed Smiles Rearrangement of 2-(Acetylamino)ethyl 2,4-Dinitrophenyl Ether in Dimethyl Sulfoxide
Authors: Okada Keiji , Matsui Kohji , Sekiguchi Shizen 
Published: July 2006

Abstract
2,4-Dinitrofluorobenzene reacts with 2-(acetylamino)ethanol in dioxane in the presence of sodium to give 2-(acetylamino)ethanol 2,4-dinitrophenyl ether (7), N-(2-acetoxyethyl)-2,4-dinitroaniline (8), which is considered to be a Smiles rearranged product of 7, and N-(2-hydroxyethyl)-2,4-dinitroaniline (9), a hydrolysis product of 8. Furthermore, 7 undergoes a Smiles rearrangement in DMSO in the presence of NaOCH3 or KOC(CH3)3, giving 8 and 9. Spiro Janovsky complex was spectrpmetrically confirmed to exist during the course of rearrangement.
Kinetic and Stereochemical Studies of the Reaction of Trialkyl(alkylthio and arylthio)stannanes with Haloalkanes
Authors: Kozuka Seizi , Ohya Sadamu 
Published: July 2006

Abstract
A kinetic study has been conducted on the reaction of arylthio(trimethyl)stannane with haloalkanes giving halotrimethylstannane and alkyl aryl sulfide. The reaction has been found to obey second order kinetics. Substituent effects of the arylthio group, solvent effects, relative reactivities of the leaving halogens and steric effects of the haloalkanes have been investigated. Optically active (+)-1-methylheptyl bromide gives an inverted product i.e., (−)-methyl 1-methylheptyl sulfide by the reaction with trimethyl(methylthio)stannane. A mechanism involving bimolecular nucleophilic attack of the sulfur atom on the haloalkane has been confirmed for the reaction.