bluuebunny/crossref_metadata_2025_split huggingface dataset:
Phase-Change Behavior of a Dialkoxo-Bridged Dinuclear Copper(II) Complex: X-Ray Crystal Structure of {2-[2-(Dimethylamino)ethylthio]ethanolato}isothiocyanatocopper(II) at 210 K
Authors: Mikuriya Masahiro , Toriumi Koshiro 
Published: August 2006

Abstract
The crystal structure of {2-[2-(dimethylamino)ethylthio]ethanolato}isothiocyanatocopper(II) at 210 K was determined by the single-crystal X-ray diffraction method. The unusual magnetic property was examined in terms of the temperature dependence of the magnetic susceptibility (85—290 K) and a differential scanning calorimetric analysis.
A Distorted Trigonal Bipyramidal Manganese(II) Complex of the Schiff Base Ligand (L) Derived from 2,6-Pyridinedicarboxaldehyde and (1R,2S)-Norephedrine; the X-Ray Structure of MnBr2L
Authors: Nakajima Kiyohiko , Kojima Masaaki 
Published: August 2006

Abstract
The title complex was synthesized and the structure was determined by the X-ray method. The oxygen atoms of the (1R,2S)-norephedrine moieties do not coordinate to manganese and the coordination polyhedron is a distorted trigonal bipyramid. The steric interactions between the bound bromide ions and the methyl and phenyl groups of the (1R,2S)-norephedrine moieties are suggested to influence the structure of the complex.
Preparation and Properties of the Dinuclear Copper(II) Complexes Containing the Derivatives of N,N,N′,N′-Tetrakis(2-benzimidazolyl)-2-hydroxy-1,3-diaminopropane and an Exogenous Bridging Ligand
Authors: Nakao Yasuo , Oohata Yasuko , Fujiwara Rika , Itadani Masumi , Sakurai Takeshi , Ichimura Akio , Mori Wasuke 
Published: August 2006

Abstract
The dinuclear copper(II) complexes of HL-Et or HL-Me and a bridging ligand (X (X = N3−, NCS−, NCO−, OH−, OAc−, (CH3)3CCOO− (OPi−), o-C6H4 (CH3)COO− (OTo−), pyrazolate (Pz−), and imidazolate (Im−))) have been prepared and characterized, where HL-Et = N,N,N′,N′-tetrakis[(1-ethyl-2-benzimidazolyl)methyl]-2-hydroxy-1,3-diaminopropane and HL-Me = N,N,N′,N′-tetrakis[(1-methyl-2-benzimidazolyl)methyl]-2-hydroxy-1,3-diaminopropane. The magnetic moments of these complexes differ depending upon their bridging groups. The electrochemistry in N,N-dimethylformamide showed that only one-electron reduction(Cu2+–Cu2+ → Cu+–Cu2+) can occur for the dinuclear complexes bridged by X = N3−, OAc−, OPi−, OTo−, Pz−, whilst the other complexes showed irreversible processes.
Crystal Structure of an Alternated Stacking Charge-Transfer Complex of 2,7-Bis(methylthio)-1,6-dithiapyrene (MTDTPY) with Tetracyano-2,6-naphthoquinodimethane (TNAP)
Authors: Toyoda Jiro , Oda Akio , Murata Ichiro , Kawamoto Atsushi , Tanaka Jiro , Nakasuji Kazuhiro 
Published: August 2006

Abstract
The charge-transfer complex of 2,7-bis(methylthio)-1,6-dithiapyrene (MTDTPY) with tetracyano-2,6-naphthoquinodimethane (TNAP) showed an alternated stacking mode of crystal structure. There are no short intermolecular contacts. The ionicity was estimated to be neutral based on an analysis of the IR stretching frequency of the CN groups and the transition energy of the charge-transfer band.
Reactions of 1,1-Diamino-2-nitroethylenes with Dimethyl Acetylenedicarboxylate
Authors: Tokumitsu Takao , Nagao Satomi 
Published: August 2006

Abstract
1,1-Diamino-2-nitroethylenes reacted with dimethyl acetylenedicarboxylate (2) to give an electrophilic adduct (dimethyl 2-[(2-imidazolidinylidene)nitromethyl]-2-butenedioate) as well as cyclocondensation products derived from the electrophilic adducts. The reaction of 1,1-dimorpholino-2-nitroethylene with 2 afforded dimethyl 2-(2,2-dimorpholino-1-nitroethenyl)-2-butenedioate or dimethyl 2-(dimorpholinomethylene)-3-(nitroethylene)butanedioate derived from the [2+2] cycloadduct.
Desulfonylative Iodination of Naphthalenesulfonyl Chlorides with Zinc Iodide or Potassium Iodide Catalyzed by Dichlorobis(benzonitrile)palladium(II) in the Presence of Lithium Chloride and Titanium(IV) Isopropoxide
Authors: Satoh Tetsuya , Itoh Kenji , Miura Masahiro , Nomura Masakatsu 
Published: August 2006

Abstract
Iodination of naphthalenesulfonyl chlorides accompanied by desulfonylation efficiently proceeded on treatment with either zinc iodide or potassium iodide using a catalyst system of [PdCl2(PhCN)2]/LiCl/Ti(OPri)4.
Free Radical Reaction of 1,3-Dimethyluracils and Caffeine with Benzoyl Peroxide in γ-Butyrolactone
Authors: Itahara Toshio , Ide Naoko 
Published: August 2006

Abstract
Treatment of 1,3-dimethyluracil, 1,3-dimethylthymine, and caffeine with benzoyl peroxide in γ-butyrolactone at 80 °C resulted in a free radical alkylation.
Studies of Collectors. XIII. The Selective Flotation of Cesium Ion with Resorcinol-Type Calix[4]arenes with Alkyl Side Chains
Authors: Koide Yoshifumi , Oka Tetsushi , Imamura Akemi , Shosenji Hideto , Yamada Kimiho 
Published: August 2006

Abstract
The resorcinol-type calix[4]arenes with alkyl side chains, [4]Ar-Rn, were prepared and then investigated as flotation collectors of Cs+. Alkali metal ions (Na+, K+, Rb+, and Cs+) were extracted in the pH range of 9.5—12.5 with [4]Ar-Rn. Moreover, the surface-active [4]Ar-Rn had competence to float Cs+ as a complex in a foam film (adsorbates) when short-chain [4]Ar-Rn (n = 4—8) were used for foam fractionation, and as scum when long-chain [4]Ar-Rn (n = 8—16) were used for ion flotation. The Cs+ was floated selectively with [4]Ar-Rn from a mixture of Na+, K+, Rb+, and Cs+, due to the strong binding to Cs+.
Deuterium Isotope Effects on Aromatic 13C Chemical Shifts. V. Nonadditivity of Methyl Substituent Effects on One-Bond Isotope Shifts for Methylpyridine N-Oxides
Authors: Nakashima Yasuki , Fukunaga Moritaka , Suzuki Keiko , Takahashi Kensuke 
Published: August 2006

Abstract
One- and two-bond deuterium isotope effects (1Δ and 2Δ) on 13C chemical shifts for methylpyridines and their N-oxides were investigated. The 1Δ values for methylpyridines agree with the calculated values, which are based on a simple additive rule of the methyl substituent effects. On the other hand, the additive rule was not satisfied in 1Δ for their N-oxides. This is attributed to a steric interaction between the substituent and the N-oxide group.
Phase Studies of a Mixed Trimethyltetradecylammonium Bromide–Hexadecyltrimethylammonium Bromide System
Authors: Suhaimi Hamdan , Rose Laili Che , Kassim Anuar 
Published: August 2006

Abstract
A phase studies was carried out on the phase equilibria in the three component systems of single and binary mixture (1 : 1) of trimethyltetradecylammonium bromide (TTAB) and hexadecyltrimethylammonium bromide (HTAB) with water and 1-hexanol at 30 °C. The phases were separated by repeated centrifugation. The birefringence was observed under cross polarizers and their consistency, texture and optical pattern were examined under the polarizing microscope. On the basis of the results obtained, a phase diagram was drawn that consists of two phases of isotropic solution and two mesophases. Results also showed a larger region for the lamellar liquid crystalline in the mixed system. The critical micelle concentration for the micellar region of the mixture was found at 0.0014 mol dm−3.
Structures of Sodium Hydrogen l-Tartrate Monohydrate and Potassium Hydrogen l-Tartrate
Authors: Kubozono Yoshihiro , Hirano Akiko , Nagasawa Shinichi , Maeda Hironobu , Kashino Setsuo 
Published: August 2006

Abstract
Crystals of sodium hydrogen l-tartrate monohydrate (NaHC4H4O6·H2O) were grown from the aqueous solution, while potassium hydrogen l-tartrate (KHC4H4O6) crystallized as anhydrate. Their crystal structures were determined by X-ray diffraction method. The hydrogen bonds between the carboxyl and carboxylate groups in these crystals are rather long; O···O 2.533(3) and 2.531(1) Å for the sodium and potassium compounds, respectively. The sodium and potassium ions are coordinated by eight O atoms at the corners of distorted square antiprism, Na+···O 2.404(2)—2.826(3) Å and K+···O 2.718(1)—3.059(1) Å. The crystal and molecular structures have been compared with those of the corresponding rubidium, caesium, and ammonium salts, and discussed with the aid of semiempirical and ab initio MO methods.
Molecular and Crystal Structure of Azobenzene-Containing Amphiphile, C3AzoC5N+Br−
Authors: Xu Guiqing , Okuyama Kenji , Shimomura Masatsugu 
Published: August 2006

Abstract
An azobenzene-containing odd-number amphiphile, C3AzoC5N+Br−, was crystallized by the vapor-diffusion method. The crystal is monoclinic with the space group P21, a = 25.866(3), b = 7.3560(9), c = 6.4833(7) Å, β = 96.255(9)°, and Z = 2. The structure was solved by the direct method and refined by the full-matrix least-squares method: R = 0.03 for 2116 observed reflections (2θ &lt; 130°, Cu Kα, λ = 1.5418 Å). The molecules are arranged in an antiparallel fashion and interdigitated mutually. The azobenzene chromophores are aligned at the center part of the hydrophobic layer (the H-aggregation state) and inclined about 65° to each other. In the hydrophilic layer, detailed structures are different from those of even-number compounds with the H-aggregation state, resulting in an odd-even effect on their transition temperature.
Numbers of Isomers of Some Classes of Pentacyclic Conjugated Hydrocarbons
Authors: Cyvin Björg Nygaard , Brunvoll Jon , Cyvin Sven Josef 
Published: August 2006

Abstract
The pentacyclic structures are considered within the initiated studies of polycyclic conjugated hydrocarbons. A complete mathematical solution (in terms of generating functions) is presented for the numbers of CnHs isomers of these structures. Some details of the analysis are given for the doubly-branched catafused structures of the category in question, a subclass to which C16H8 cyclic bicalicene and C24H16 tetraphenylene belong.
Topochemical Studies. XVI. Direct Observation of the Solid-State Photoreaction of α-(Acetylamino)cinnamic Acid Dihydrate by Single Crystal X-Ray Diffraction
Authors: Iwamoto Tetsuyuki , Kashino Setsuo 
Published: August 2006

Abstract
The crystal structure at an intermediate stage in the solid-state photodimerization of α-(acetylamino)cinnamic acid dihydrate has been analyzed at the conversion rate of 12%: C11H11NO3·2H2O, Mr = 241.24, monoclinic, P21/a, a = 18.346(5), b = 6.072(2), c = 11.310(4) Å, β = 105.90(2)°, V = 1211.8(6) Å3, Z = 4, Dx = 1.323 Mg m−3, Cu Kα (λ = 1.5418 Å), μ = 0.89 mm−1, F(000) = 512, T = 295 K, R = 0.108 for 1678 unique reflections with |Fo| larger than σ(Fo). The present study revealed the structures of the monomer and photodimer components at the intermediate stage. The results made possible the discussion on the role of intermolecular hydrogen bonds and on the feature of the atomic movements accompanied by the reaction.
Vibrational Spectra of N-Acyl-l-Glutamic Acid Oligomers and the Long N-Acyl Chain Effect
Authors: Uehara Toshiyuki , Okabayashi Hirofumi , Taga Keijiro , Yoshida Tadayoshi , Kojima Hiroshi , Nishio Etsuo 
Published: August 2006

Abstract
Trimers and tetramers of N-acyl-l-glutamic acid oligomers (Glu-oligomers) with various acyl chains have been prepared. For these Glu-oligomer molecules the vibrational spectra were measured and compared with those of two β-forms (β1 and β2) and the α-helical form of poly(l-glutamic acid). For these samples the molecules take up a β2-type structure in the solid state. The long acyl chain in the oligomers induces stronger hydrogen bonds between the side-chain COOH and the amide linkages; this effect is due to the close packing of the long acyl chains accompanying the reduction of the intersheet spacing. Moreover, the long acyl-chain effect strongly depends upon the residue number of the oligomer. For cast films of Glu-oligomers made onto an NaCl plate, these oligomer molecules assume an α-helical type structure. For the α-helical type oligomers, it is also found that the long acyl chain induces stronger hydrogen bonds in the side-chain COOH groups, and that the effect depends on the residue number.
Determination of Lead in Fish Tissues by Electrothermal Atomic Absorption Spectrometry Using Bismuth Nitrate as Chemical Modifier
Authors: Chakraborty Ruma , Bhattacharyya Shuvendu S , Das Arabinda K 
Published: August 2006

Abstract
The electrothermal atomic absorption spectrometry has been used to develop a routine and interference-free method for the determination of lead in fish tissues. Bismuth(III) nitrate was used as a chemical modifier. The analytical curves of lead were studied by using pyrolytically coated graphite tubes. The instrumental conditions, electrothermal atomizer programme, concentration of the modifier, the calibration and addition curves were studied. A comparative study was also made between Pd(NO3)2 and Bi(NO3)3 as chemical modifiers. Not only a better limit of detection value has been obtained in comparison to Pd(NO3)2 modifier but also a lower atomization temperature, hence an extension of the life period of the graphite tube compared to magnesium nitrate+ammonium dihydrogen phosphate mixed modifier could be achieved in the present method.
Solvent Extraction of Europium(III) with 1-Naphthoic Acid into Chloroform in the Absence and Presence of Tetrabutylammonium Ions or Trioctylphosphine Oxide
Authors: Noro Junji , Sekine Tatsuya 
Published: August 2006

Abstract
The solvent extraction of europium(III) in 0.1 mol dm−3 sodium nitrate solutions with 1-naphthoic acid (HA) into chloroform was studied in the absence and presence of tetrabutylammonium ions (tba+) or trioctylphosphine oxide (TOPO). In the absence of tba+ and TOPO the distribution ratio of europium(III) with 0.1 mol dm−3 1-naphthoic acid was higher when the initial concentration of the metal was higher under otherwise identical conditions. This could be explained in terms of the extraction of a polynuclear species, Eu2A6(HA)2, in addition to a mononuclear species, EuA3HA. Furthermore, by the addition of tba+ or TOPO, the extraction of europium(III) was greatly enhanced. This could be explained in terms of the extraction of the ternary complex, EuA4−tba+, or the adducts, EuA3TOPO and EuA3(TOPO)2, like that found in the extraction of this metal ion with β-diketones. In these systems the extracted anionic complex with tba+ or the adducts with TOPO were only mononuclear, even under conditions in which the polynuclear species were extracted in the absence of these.
Structural Change in Lithium Intercalation of Defect Perovskite LiCuM3O9 (M = Ta, Nb)
Authors: Sato Mineo , Jin Tetsuro , Hama Yoshiki , Uematsu Kazuyoshi 
Published: August 2006

Abstract
The chemical lithium intercalation of defect perovskite LiCuM3O9 (M = Ta, Nb) compounds has been performed by using butyllithium. The content of the inserted lithium ions in the compounds was found to be ca. 1 mol per unit formula for M = Ta and ca. 4 mol per unit formula for M = Nb. The crystal structure of the intercalated compound was determined based on the powder X-ray diffraction pattern. The intercalated product was well crystallized for M = Ta, but almost amorphous for M = Nb. The Rietveld refinement confirmed that the intercalated tantalate, Li2CuTa3O9, adopts a rhombohedrally distorted perovskite structure with a = 5.4896(8) Å, α = 56.544(8)° and Z = 2 for the R3c space group. The Li and Cu atoms are statistically distributed over an identical crystallographic site with an atomic ratio of Li : Cu = 2 : 1. The coordination of the nearest-neighbor oxygen atoms around the (Li,Cu) site was changed from square-planar four-fold to triangular three-fold, accompanied by an intercalation reaction. This structural change could be reasonably explained as being due to the occurrence of a reduction of strong Jahn-Teller Cu2+ ions to Cu+ ions as a result of the lithium insertion.
Evaluation of the β-Sheet-Structure-Stabilizing Potential of 20 Kinds of Amino Acid Residues in Protected Deca- and Pentadecapetides
Authors: Lee Jin-Shik , Murakawa Yuka , Fujino Kentarou , Narita Mitsuaki 
Published: August 2006

Abstract
The β-sheet-structure-stabilizing potential of 20 kinds of guest amino acids has been evaluated by solvent titration for the protected pentapeptide, Boc–X–Ala–Glu(OBzl)–Leu–Gly–OPac, described previously. It has been proved that the &lt;SPβ&gt; value was effective in evaluating the β-sheet-structure stability of protected tri- to heptapeptide in organic solvents. In order to widen the application range of the &lt;SPβ&gt; value, deca- and pentadecapeptides were synthesized by fragment condensation of pentapeptides. The β-sheet-structure-stabilizing potentials of individual guest amino acids determined from deca- and pentadecapeptides showed different results from the &lt;SPβ&gt; value. Circular dichroism showed that deca- and pentadecapeptides adopted helix and random coil structures in organic solvents. The helix structure influences the solvation mechanism of these protected peptides.
Steric and Electronic Effects on the Dehydration Step in Cyclohexanone and Bicyclic Ketones Oxime Formation
Authors: Brighente Ines Maria Costa , Vottero Leonor Rosa , Terezani Alberto Jose , Yunes Rosendo Augusto 
Published: August 2006

Abstract
Between pH 4 and pH 13, oxime formation from hydroxylamine with cyclohexanone and bicyclic ketones proceeds with rate limiting dehydration of the addition intermediate which is in equilibrium with the ketone and hydroxylamine. The dehydration step exhibits catalysis by oxonium ion (pH 4 to ca. 8), a pH independent pathway (pH 8 to ca. 10) and catalysis by hydroxide ion (pH ca. 10 to 13). The steric and electronic effects give important insights into the structure of the transition state of the mechanisms of oxonium ion, hydroxide ion catalyzed and spontaneous reaction.
Synthesis of 1,1-Dialkoxy Derivatives of 2,5-Diphenylsilacyclopent-3-ene and 2,5-Diphenylsilacyclopentane
Authors: Nagao Yukinori , Takahashi Masahiro , Abe Yoshimoto , Misono Takahisa , Jung Michael E 
Published: August 2006

Abstract
The 1,1-dialkoxy derivatives of 2,5-diphenylsilacyclopent-3-ene were prepared by a one-pot reaction of magnesium with (E,E)-diphenyl-1,3-butadiene and dialkoxydichlorosilanes. The trans content in each silacyclopentene was higher than the cis content. Hydrogenation of these silacyclopentenes gave the corresponding silacyclopentanes in high yields.
Synthesis of a Stereoisomer of Frullanolide Utilizing the Intramolecular Cyclization of ω-Formyl-2-alkenylsilane
Authors: Kuroda Chiaki , Shimizu Shigeru , Haishima Takahiro , Satoh James Y 
Published: August 2006

Abstract
Synthesis of 10-epi-frullanolide (3) is reported via the intramolecular cyclization of ω-formyl-α-trimethylsilylmethyl-α,β-unsaturated ester. The cyclization precursor, ethyl (Z)-5-(2-formyl-1,3-dimethyl-2-cyclohexenyl)-2-trimethylsilylmethyl-2-pentenoate (17), was prepared from 2,6-dimethyl-2-cyclohexen-1-one through the dialdehyde monoacetal as the key intermediate. Cyclization of 17 with tetrabutylammonium fluoride produced the hydroxy ester having C(6α)–H and C(7β)–H, which was hydrolyzed, then subjected to Fujisawa’s lactonization to afford 3.
Reactions of Cyclic C7H6-System: Reactions of a Tautomer of Cycloheptatetraene and Cycloheptatrienylidene with Tropone, Heptafulvene, and 1,3,5-Cycloheptatriene Derivatives
Authors: Saito Katsuhiro , Suzuki Satoshi , Watanabe Tetsuya , Takahashi Kensuke 
Published: August 2006

Abstract
Reactions of a cyclic C7H6-system, a tautomer of 1,2,4,6-cycloheptatetraene and 2,4,6-cycloheptatrienylidene, with tropone derivatives and 8,8-dicyanoheptafulvene afforded exo-[4π+2π] cycloadducts. Similar reactions with 1,3,5-cycloheptatriene derivatives gave exo-[6π+2π] cycloadducts. These reactions are considered to proceed through zwitter ionic intermediates containing tropylium ion moieties.
Stereoselectivity in the Preparation of 5,6-Dideoxy-5-dimethoxyphosphinyl-d- and -l-hexofuranoses, and an Efficient Synthesis of 5,6-Dideoxy-5-hydroxyphosphinyl-l-galactopyranose (a P-in-the-Ring l-Fucose Analogue)
Authors: Hanaya Tadashi , Yasuda Kiyomi , Yamamoto Hiroshi , Yamamoto Hiroshi 
Published: August 2006

Abstract
The addition of dimethyl phosphonate to five kinds of 6-O-tosyl-hexofuranos-5-uloses 3a—e (α-d-xylo, α-d-ribo, β-d-arabino, α-d-lyxo, and β-d-ribo) in the presence of DBU, followed by the catalytic hydrogenolysis in the presence of Raney-Ni (W-4), afforded (5S)- and (5R)-5,6-dideoxy-hexofuranose derivatives in the ratios of 1 : 0—2 : 1, depending upon the kinds of substituents on the β-side of the furanose ring of the intermediate 5,6-dideoxy-hex-5-enofuranoses. A P-in-the-ring sugar analogue of l-fucose type, 5,6-dideoxy-5-hydroxyphosphinyl-l-galactopyranoses, was efficiently prepared from 3-O-benzyl-5,6-dideoxy-1,2-O-isopropylidene-5-dimethoxyphosphinyl-α-l-galactofuranose readily obtained by the selective preparation mentioned above.
Synthesis of Dibenzotrisdehydro[16]annulene-1,4-dione and the Related Compounds
Authors: Higuchi Hiroyuki , Yamamoto Hiroyuki , Ojima Juro , Yamamoto Gaku 
Published: August 2006

Abstract
Synthesis of 7,8:13,14-dibenzo-2,9,11-trisdehydro[16]annulene-1,4-dione is described. Attempts to prepare diaza[18]annulene derivatives by ring expansion of the dibenz[16]annulenedione and its dimethyl analog are also described. Examination of 1H NMR spectra indicates that the dibenz[16]annulenedione shows no ring current effect.
Favorskii Rearrangement and Carbon–Carbon Bond-Cleavage of α-Chloro-α-sulfonyl Ketones: A Synthesis of Carboxylic Acids and Their Derivatives from Aldehydes and Ketones
Authors: Satoh Tsuyoshi , Oguro Kazuko , Shishikura Jun-ichi , Kanetaka Naomi , Okada Reiko , Yamakawa Koji 
Published: August 2006

Abstract
A method for synthesizing carboxylic acids and their derivatives from aldehydes and ketones via α-chloro-α-sulfonyl ketones is described. Acyclic α-chloro-α-sulfonyl ketones were synthesized from aldehydes and 1-chloroalkyl p-tolyl sulfoxides with carbon–carbon coupling in good overall yields. Cyclic α-chloro-α-sulfonyl ketones were synthesized from cyclic ketones in three steps in high overall yields. The Favorskii rearrangement of both acyclic- and cyclic α-chloro-α-sulfonyl ketones with sodium hydride in the presence of amine gave β-sulfonyl amides with skeletal rearrangement in good to excellent yield. Amides and α,β-unsaturated amides were synthesized from the β-sulfonyl amides. Treatment of the cyclic α-chloro-α-sulfonyl ketones with alkoxides and hydroxide gave carboxylic esters and acids with cleavage of the ring in good to excellent yields.
Triethylborane Induced Stereoselective Radical Addition of R3SiH to Acetylenes and Stereoselective Reduction of Alkenyl Iodides with Tris(trimethylsilyl)silane
Authors: Miura Katsukiyo , Oshima Koichiro , Utimoto Kiitiro 
Published: August 2006

Abstract
Triethylborane induced radical addition of various organosilanes (R3SiH) to acetylenes has been studied. Among them, tris(trimethylsilyl)silane (TTMSS) proved to be the best reagent for the hydrosilylation of acetylenic compounds in terms of yield and stereoselectivity. For instance, reaction of 1-dodecyne with TTMSS at room temperature for 3 h under Et3B catalyst provided (Z)-1-tris(trimethylsilyl)silyl-1-dodecene selectively in 98% yield. The stereochemical course of reduction of alkenyl iodides with TTMSS–Et3B or n-Bu3SnH–Et3B has been examined. Treatment of 1-dimethylphenylsilyl-2-iodo-1-dodecene with TTMSS–Et3B at room temperature afforded (Z)-1-dimethylphenylsilyl-1-dodecene selectively (Z/E &gt; 30/1). On the other hand, treatment with n-Bu3SnH-Et3B gave (E)-1-dimethylphenylsilyl-1-dodecene exclusively.