bluuebunny/crossref_metadata_2025_split huggingface dataset:
Triethylborane Induced Perfluoroalkylation of Silyl Enol Ethers and Ketene Silyl Acetals with Perfluoroalkyl Iodides
Authors: Miura Katsukiyo , Takeyama Yoshihiro , Oshima Koichiro , Utimoto Kiitiro 
Published: July 2006

Abstract
Reaction of perfluoroalkyl iodides with silyl enol ethers mediated by Et3B in the presence of base such as 2,6-dimethylpyridine provides mixtures of perfluoroalkylated trialkylsilyl enol ethers and α-perfluoroalkylated ketones. The yield and distribution of the products heavily depend on the nature of base employed. Treatment of a reaction mixture consisting of perfluoroalkylated silyl enol ether and α-perfluoroalkylated ketone with coned HCl in THF gives α-perfluoroalkylated ketone as a single product. Reaction of ketene silyl acetals with perfluoroalkyl iodides in the absence of base affords α-perfluoroalkylated esters in excellent yields.
Characteristics of the Membrane Permeability of Temperature-Sensitive Liposome
Authors: Ueno Masaharu , Yoshida Shoshin , Horikoshi Isamu 
Published: July 2006

Abstract
The relationship between the temperature-sensitivity of the release of an entrapped drug from liposome as well as the type of drug or liposome is discussed. The drug release from DPPC liposome (dipalmitoylphosphatidylcholine liposome) has been confirmed to increase abruptly near its phase-transition temperature for both low-molecular-weight compouds (such as calcein) and high-molecular-weight compounds (such as dextran). The amount of temperature-sensitive calcein released from the liposomes was dependent on the method of liposome preparation: that is, the release from REV (reverse phase evaporated vesicle) was the highest; next was that from LUV (large unilamellar vesicle prepered by detergent removal method), and lowest was from SUV (small unilamellar vesicle prepared by an ultrasonication method). In order to examine the size effect of liposomes on temperature-sensitive drug release, REV was fractionated into three groups according to their average sizes and calcein release for each group was investigated. The temperature at which calcein release showed a maximum was almost the same in each of three groups; while as the average liposome size of a group was larger, the initial rate of calcein release became higher and the temperature at which calcein release began became lower. The amount of release of a entrapped drug was primarily dependent on the molecular weight of the drug, in spite of the variety of drugs investigated.
Difference of the Final Products of the Photochemical Reactions of Azanaphthalenes and Naphthalene in Mixed Crystals of Durene
Authors: Hoshi Nagahiro , Yamauchi Seigo , Hirota Noboru 
Published: July 2006

Abstract
Final products of the photochemical reactions of quinazoline, quinoline, and naphthalene in 1,2,4,5-tetramethylbenzene (durene) mixed crystals are investigated on the basis of the phosphorescence and fluorescence spectra of the products. Quinazoline in durene is considered to transform into a benzene derivative, whereas naphthalene and quinoline tranform into anthracene derivatives. These products are different from a pyrazine derivative found in the case of quinoxaline, which is specific to the reaction in a durene mixed crystal. The cause of this difference is discussed in terms of the configurations of guests in the mixed crystals and the difference of the molecular structures.
Phase Separation Coupled with Gelation in Polyethylene Glycol–Gelatin–Aqueous Buffer System
Authors: Nezu Takashi , Maeda Hiroshi 
Published: July 2006

Abstract
Phase behavior of a pseudoternary system, gelatin–polyethylene glycol–acetate buffer, was examined. Phase diagram was constructed by determining the compositions of separated phases. One phase contained mostly gelatin but a trace amount of polyethylene glycol. When temperature was lower than the gelation temperature corresponding to the composition of the separated phase, diverse outlooks of the whole system were found. Observation of solutions under an optical microscope revealed microgels or network structure when gelatin was labeled with sirius red. Two different types of microgel formation were noted: nucleation-growth and spinodal decomposition. Size of the microgels formed by spinodal decomposition decreased with quench temperature.
Thermal and Electrooptical Properties of Ferroelectric Liquid Crystals Having OH Groups
Authors: Sugiyama Kazuo , Kato Koichi , Shiraishi Kohei 
Published: July 2006

Abstract
Four kinds of ferroelectric liquid crystals (FLCs) possessing OH groups, ((S)-2-methylbutyl 4-[4-(11-hydroxyundecyloxy)benzylideneamino]cinnamate 4a, (S)-2-methylbutyl 4-[4-(11-hydroxyundecyloxy)-2-hydroxybenzylideneamino]cinnamate 4b, (S)-2-hydroxypropyl 4-[4-(11-hydroxyundecyloxy)benzylideneamino]cinnamate 4c, and (S)-2-hydroxypropyl 4-[4-(11-hydroxyundecyloxy)-2-hydroxybenzylideneamino]cinnamate 4d) were prepared in order to understand how the introduction of OH groups in FLCs affect the phase behavior and electrooptical effects. α,ω-Diols 4c and 4d show a higher transition temperature of the smectic A (SA) phase than do ω-hydroxyl compounds 4a and 4b. Comparing 4b and 4d both of which have an OH group at the o-position of the benzylidene group with 4a and 4c, the former samples show a higher SA-isotropization (I) transition temperature than do the latter ones. It is suggested from IR spectroscopic results that inter- and intramolecular hydrogen bonding contribute to the stabilization of the SA phase. The order of the helical pitch in the chiral smectic C (Sc*) phase was found to be 4b&gt;4a&gt;4d&gt;4c within 1.8–6.6 μm. From an electrooptical effect due to a deformation of the helical structure in the Sc phase, the rise time of the surface director (τsr) and the rise time of the bulk director (τbr) were measured to be as follows: τsr are 850, 1500, 30, and 70 μs, and τbr are 12, 100, 0.17, and 0.35 ms for 4a, 4b, 4c, and 4d, respectively. It was found that the intramolecular hydrogen bonding results in a slower optical response time, whereas intermolecular hydrogen bonding results in a faster one.
Determination of Rhodium by Third-Derivative Spectrophotometry with o-Hydroxyhydroquinonephthalein in the Presence of N-Hexadecylpyridinium Chloride
Authors: Mori Itsuo , Fujita Yoshikazu , Toyoda Minako , Maekubo Sachi 
Published: July 2006

Abstract
A third-derivative spectrophotometric determination (d3A⁄dλ3) of rhodium with o-hydroxyhydroquinonephthalein (Qnph) in the presence of N-hexadecylyridinium chloride (HPC) was proposed by measuring the distance of d3A⁄dλ3 on the peak at 530 nm (λ3) and the troughs at 500 nm (λ2) and 560 nm (λ4). Beer’s law was valid for the range 0–10 μg rhodium 10−1 cm3; the apparent molar d3A⁄dλ3 was 7.37×105 dm3 mol−1 cm−1.
Reactions of 2-Hydrazino- and 8-Hydrazinocyclohepta[b]pyrroles with Dimethyl Acetylenedicarboxylate
Authors: Abe Noritaka , Yatabe Kumiko 
Published: July 2006

Abstract
2-Hydrazinocyclohepta[b]pyrrole reacted with dimethyl acetylenedicarboxylate (DMAD) to give the hydrazones (2a), the pyrimidinone-fused cyclohepta[b]pyrrole (3), 1,2,4-triazinone-fused cyclohepta[b]pyrroles, and the 1,2-dihydro-3H-pyrazol-3-one derivative. Thermolysis of 2a gave 3 and tetramethyl pyrrole-2,3,4,5-tetracarboxylate. The reaction of ethyl cyclohepta[b]pyrrole-3-carboxylate with DMAD at room temperature gave the hydrazone and the spiropyrazoline derivative.
Cycloadditions of 2,8,11-Triphenyl-7,9,10,11b-tetraazanaphth[1,2,3-cd]azulene and 2,8,10-Triphenyl-9-oxa-7,10b-diazaindeno[4,5,6-cd]azulene with Dimethyl Acetylenedicarboxylate
Authors: Abe Noritaka , Hirai Yoshimasa , Fukazawa Yoshimasa 
Published: July 2006

Abstract
Cycloadditions of the title compounds with dimethyl acetylenedicarboxylate gave 1:2-cycloadducts. The structural assignments of the products were deduced by spectral inspections; the structure for one compound was established by X-ray crystallography.
The Structure of Notoryne, a Halogenated C15 Nonterpenoid with a Novel Carbon Skeleton from the Red Alga Laurenda nipponica Yamada
Authors: Kikuchi Hajime , Suzuki Teruaki , Kurosawa Etsuro , Suzuki Minoru 
Published: July 2006

Abstract
A new halogenated C15 nonterpenoid with a novel carbon framework, named notoryne, has been isolated from the title alga and its structure was established on the basis of spectroscopic and chemical evidence. In addition, the structure of a rearranged product, whose structure has long remained unsettled, of laurefucin derivative was also determined by spectral and chemical methods. Furthermore, the biogenesis of the halogenated C15 nonterpenoids from L. nipponica collected at warm current region in Hokkaido is also discussed.
Some Unusual Properties of Tris(2,6-dimethoxyphenyl)phosphine Sulfide and the Related Compounds
Authors: Wada Masanori , Kanzaki Mitsuyuki , Fujiwara Masanobu , Kajihara Kazuhisa , Erabi Tatsuo 
Published: July 2006

Abstract
The title sulfide {2,6-(MeO)2C6H3}3P=S [abbr. (2,6)3P=S] reacted with acids to form a novel mercaptophosphonium salt [(2,6)3P–SH]X, solution thermolysis of which in the absence or presence of triphenylphosphine resulted in the unusual desulfurization to give the tertiary phosphonium salts [(2,6)3P–OH]X. (2,6)3P=S also reacted with alkyl iodides or bromides under mild conditions to give stable (alkylthio)phosphonium salts [(2,6)3P–SR]X (R=Me, Et, n-Bu), which reacted with thiols at room temperature in the presence of a catalytic amount of the tertiary phosphine (2,6)3P to give [(2,6)3P–H]X and unsymmetrical disulfides.
Photochemical Reactions of Aryl-Substituted Digermanes through a Pair of Organogermyl Radicals
Authors: Mochida Kunio , Wakasa Masanobu , Sakaguchi Yoshio , Hayashi Hisaharu 
Published: July 2006

Abstract
The photochemical reactions of aryl-substituted digermanes were investigated by trapping experiments and a laser flash photolysis technique. The photolysis of phenylated digermanes resulted in germanium–germanium bond homolysis to give a pair of two germyl radicals. The germyl radicals abstracted a chlorine atom from carbon tetrachloride to give chlorogermanes. The pair of germyl radicals also underwent ipso-substitution, which was a precursor of the germylenes. The mechanism for the photochemistry of phenylated digermanes is discussed.
Separation of Scandium Using Liquid–Liquid Extraction with Macrocyclic Polyether(s) from Picrate Media
Authors: Deorkar N V , Khopkar Shnpad M 
Published: July 2006

Abstract
Scandium was quantitatively extracted at pH 2.5–4.5 with 4.0×10−2 mol dm−3 18-crown-6 in dichloromethane from 4.0×10−2 mol dm−3 solution of picric acid. It was stripped with 0.1 mol dm−3 nitric acid and determined spectrophotometrically at 650 nm as its complex with Arsenazo-III. It was separated from yttrium, lanthanides, zirconium, hafnium, vanadium, niobium, and uranium in multicomponent mixtures. Scandium from rock sample was also analysed.
Spin-Trapping of Selenium-Containing Inorganic Radicals in Aqueous Solutions
Authors: Ozawa Toshihiko , Hanaki Akira 
Published: July 2006

Abstract
The selenite radical anion, SeO3\divdot, can be detected by ESR spectroscopy using water-soluble spin-traps, N-(4-pyridylmethylene)-t-butylamine N,N′-dioxide (POBN) and 3,5-dibromo-4-nitrosobenzenesulfonate (DBNBS), but selenate radical anion, SeO4\divdot, cannot be trapped by POBN or DBNBS.
Association of p-Halofluorobenzenes with α- and β-Cyclodextrins in Aqueous Medium
Authors: Takuma Tatsuyoshi , Deguchi Toshio , Sanemasa Isao 
Published: July 2006

Abstract
The complex formation of α- and β-cyclodextrins (CyDs) with p-(chloro, bromo, and iodo)fluorobenzenes has been studied in aqueous medium at 25°C. Formation constants are compared with those of CyD–monohalobenzene systems.
Synthesis of Azonia Derivatives of Benzoperylene and Benzocoronene by Photocyclization
Authors: Arai Sadao , Nakamura Norikazu , Yamaguchi Hiromichi , Okazaki Masa-aki , Hida Mitsuhiko 
Published: July 2006

Abstract
The 2-styrylbenzo[a]quinolizinium salt was photocyclized to afford 12a-azoniabenzo[ghi]perylene salt in 66% yield. The 2a-azoniabenzo[a]coronene salt was obtained by the photocyclization of 2-[2-(4-biphenylyl)vinyl]benzo[a]-quinolizinium salt and 2-styryl-10-phenylbenzo[a]quinolizinium salt in 80% and 75% yields, respectively.
Association Behavior of Protoporphyrin IX in Water and Aqueous Poly(N-vinylpyrrolidone) Solutions. Interaction between Protoporphyrin IX and Poly(N-vinylpyrrolidone)
Authors: Inamura Isamu , Uchida Kazutomo 
Published: July 2006

Abstract
The association behavior of protoporphyrin IX was investigated at different pH by absorption spectroscopy and gel chromatography. Protoporphyrin IX existed as monomer in acidic water, as aggregate in neutral water, and as dimer in basic water. Poly(N-vinylpyrrolidone) tended to suppress dimerization and aggregation of protopophyrin IX.
Mesomorphic Properties of 4-[3,4-Bis(4-alkoxybenzoyloxy)benzylideneamino]azobenzenes and Related Compounds
Authors: Masuda Tatsuya , Matsunaga Yoshio 
Published: July 2006

Abstract
The mesomorphic properties of a homologous series of 4-[3,4-bis(4-alkoxybenzoyloxy)benzylideneamino]azobenzenes have been studied by differential scanning calorimetry and microscopy. While the nematic phases exhibited by the ethoxy and propoxy homologues are metastable, those exhibited by all of the butoxy-to-hexadecyloxy homologues exhibit the temperature range of stable existence. A metastable smectic A-phase is observed for the tetradecyloxy and hexadecyloxy homologues. Among the examined 4-[2,4-bis(4-alkoxybenzoyloxy)benzylideneamino]azobenzenes, only the dodecyloxy and tetradecyloxy members are nematogenic. Their clearing points are located at more than 30 °C below the melting points. 4-(Benzylideneamino)azobenzene and its 3-(4-dodecyloxybenzoyloxy) derivative are nonmesogenic; however, the phase diagrams of binary systems with 4-(4-nonyloxybenzylideneamino)azobenzene revealed that the addition of a 3-(4-dodecyloxybenzoyloxy) group to the former molecule depresses the virtual nematic behavior, but promotes the smectic A behavior. A further addition of the same group at the 4-position drastically raises the nematic-isotropic transition temperature.
Computational Studies of the Isomerization Pathways of Isocyanic Acid HNCO
Authors: Yokoyama Keiichi , Takane Shin-ya , Fueno Takayuki 
Published: July 2006

Abstract
Paths of isomerizations of isocyanic acid HNCO into various chain isomers via ring intermediates have been investigated by ab initio MO calculations with the MRD-CI procedure employing the 6-31G** basis sets. Geometry optimizations were accomplished at the RHF, UHF, or CASSCF level of theory. It is found that the isomerization from HNCO to cyanic acid HOCN is energetically the most favorable and that it should proceed via successive 1,2-hydrogen migrations rather than by a single 1,3-hydrogen migration. The overall barrier height is calculated to be 423 kJ mol−1, which is ca. 60 kJ mol−1 higher than the critical energy for the main decomposition channel, HNCO→NH(3Σ)+CO. Implications of the results to the kinetics of the thermal decompostion of HNCO at high temperatures are discussed.
Selenation of 1,5-Naphthoquinones: Novel Synthesis of Naphthopyridoselenazines
Authors: Sakakibara Makoto , Ishida Tetsuya , Watanabe Yoshihiko , Toru Takeshi , Ueno Yoshio 
Published: July 2006

Abstract
Selenation of 2-chloro- and 2,6-dichloro-1,5-naphthoquinones with benzeneselenolate ion, generated from diphenyl diselenide and tributylphosphine in an alkaline medium, afforded 2-phenylseleno- and 2,6-bis(phenylseleno)-1,5-naphthoquinones in excellent yields. Reaction of halo-1,4-naphthoquinones with 3-amino-2-pyridineselenolate ion generated from bis(3-amino-2-pyridyl) diselenide gave naphtho[2,1-b]pyrido[3,2-e][1,4]selenazines and pyrido[2,3-b]pyrido[3″,2″:5′,6′][1,4]selenazino[2′,3′:3,4]naphtho[1,2-e][1,4]selenazines in high yields.
On the Role of Gallium for the Aromatization of Lower Paraffins with Ga-Promoted ZSM-5 Catalysts
Authors: Fujimoto Kaoru , Nakamura Ikusei , Yokota Kohshiroh , Aimoto Kohjiroh 
Published: July 2006

Abstract
H–ZSM-5 showed a high selectivity of propane and low selectivity of aromatic hydrocarbons in butane conversion at 450°C, whereas Ga-supportd ZSM-5 (Ga–ZSM-5) showed higher selectivities of aromatic hydrocarbons and hydrogen. A small amount of oxygen in the feed promoted butane conversion to aromatic hydrocarbons on H–ZSM-5. Hybrid catalysts composed of the physical mixture of Ga/Al2O3 and H–ZSM-5 showed comparable activities and aromatic selectivities to those of the Ga-supported ZSM-5 zeolite (Ga–ZSM-5). Hydrogen was adsorbed quickly on the Ga–ZSM-5 and on the hybrid catalyst at 400°C and the adsorbed hydrogen was desorbed at around 450°C during the temperature programmed desorption experiment from both catalysts. However, little hydrogen was adsorbed on H–ZSM-5 and was desorbed from it. It was pointed out that the supported Ga promoted the zeolite-catalyzed aromatization of lower paraffins by promoting hydrogen desorption via the “reverse spillover” effecct.
Effect of Water Vapor on the Formation of Lithium cyclo-Hexaphosphate
Authors: Nariai Hiroyuki , Motooka Itaru , Tsuhako Mitsutomo 
Published: July 2006

Abstract
The effect of water vapor on the formation of lithium cyclo-hexaphosphate Li6P6O18(P6m) from trilithium hydrogenpyrophosphate monohydrate Li3HP2O7·H2O was investigated by means of DTA-TG, X-ray diffraction analysis, isothermal heating with electric furnace, and HPLC. Li3HP2O7·H2O lost the water of crystallization at about 180°C to give anhydrous Li3HP2O7. At 300°C the disproportionation of Li3HP2O7 anhydride to Li4P2O7 and Li4P4O12 (P4m) proceeded faster under humid conditions than under dry air, and subsequently P4m increased with a decrease in P2 and soluble polyphosphates (Ppoly). At 400°C, P4m changed largely to P6m under humid conditions. In these reaction processes, water plays an important role as catalyst in the cyclization by dehydration of the end group and in ring opening by attacking the P–O–P bond. At 450°C, the amounts of P2 and P6m were almost equal under both humid and dry conditions, because all of P4m thermally changed to P6m.
Kinetics and Mechanism of Reduction of Metmyoglobins by Dithionite. Role of the Heme Propionates
Authors: Tsukahara Keiichi , Ishida Kazuyo 
Published: July 2006

Abstract
The kinetics of the reduction by dithionite ions of metmyoglobins reconstituted with porphinatoiron(III) complexes containing the protoporphyrin IX dimethyl ester, the deuteroporphyrin IX dimethyl ester, and octaethylporphyrin were studied at 25°C and pH 6.3–9.2 in aqueous solution. Esterification of the heme propionate groups accelerated the reduction rate by SO2\divdot as well as the case of octaethylporphyrin (which does not contain the propionate groups); it also affected the redox potential of metmyoglobin, but much less so the rate of the self-exchange reaction. The reaction mechanisms are discussed.
A Novel Catalyst System, Trimethylsilyl Chloride and Indium(III) Chloride, as an Efficient Catalyst in the Sulfide Synthesis
Authors: Mukaiyama Teruaki , Ohno Takashi , Nishimura Takashi , Han Jeong Sik , Kobayashi Sh\={u} 
Published: July 2006

Abstract
O-Trimethylsilyl monothioacetals, which are generally difficult to activate under acidic conditions due to their rapid disproportionation, smoothly react with triethylsilane in the presence of a novel catalyst system, trimethylsilyl chloride and indium(III) chloride, to afford the corresponding sulfides in good to high yields. One pot synthesis of sulfides from aldehydes is also attained in high yields by successive treatments of aldehydes with trimethylsilyl alkyl (aryl) sulfides and triethylsilane in the presence of the above catalyst system under extremely mild conditions.
Inclusion Compounds of α-Truxillic Acid. X-Ray Crystal Structures of the Coordinatoclathrates with Methanol (1 : 2) and Dimethylacetamide (1 : 2)
Authors: Csöregh Ingeborg , Czugler Mátyás , Kálmán Alajos , Weber Edwin , Hecker Manfred 
Published: July 2006

Abstract
The crystal structures of the inclusion compounds of the 2c,4t-diphenylcyclobutane-1r,3t-dicarboxylic acid (α-truxillic acid) host (1) with methanol [MeOH] (1 : 2) and with dimethylacetamide [DMA] (1 : 2) have been determined by single crystal X-ray diffraction. The substantial difference between the effects of the protic (MeOH) and aprotic (DMA) guests on the molecular packing is discussed. Crystal data: 1 · 2MeOH: monoclinic (P21⁄n), a=12.528(4), b=5.589(1), c=13.715(4) Å, β=101.16(4)°, Z=2, R=0.064 for 1300 reflections; 1 · 2DMA: monoclinic (P21⁄c), a=6.151(1), b=26.586(2), c=7.938(1) Å, β=105.32(6)°, Z=2, R=0.056 for 1488 observations. In both clathrates, half of the rigid α-truxillic acid molecule occupies the asymmetric unit together with one guest molecule. The hydrogen bonds between the trans-positioned functional groups of the host acid and the guest molecules in 1 · 2MeOH give rise to infinite layers parallel with the crystallographic ac diagonal. In contrast, the only one-way hydrogen bond from host to guest in 1 · 2DMA leads to discrete 1 : 2 host–guest aggregates. In this latter case, the hosts and guests are stacked separately, along the c axis direction.
Synthesis and Properties of Gramicidin S Analogs Consisting of Eight Amino Acid Residues
Authors: Tamaki Makoto , Akabori Sadatoshi 
Published: July 2006

Abstract
Three cyclic octapeptides (des-Val1,1′-gramicidin S, des-Leu3,3′-gramicidin S and des-Val1, Leu3′-gramicidin S), showed no antibiotic activity. Although their CD spectra resembled each other, they differed from that of gramicidin S. These results indicate that the removal of two of the Val and/ or Leu residues at positions 1, 1′, 3, and 3′ of gramicidin S greately affects both the antibiotic activity and conformation.
Synthesis of N-Methylaniline and N,N-Dimethylaniline with Methanol over Alumina Catalyst
Authors: Matsuhashi Hiromi , Arata Kazushi 
Published: July 2006

Abstract
Alumina catalysts prepared by different methods were used for the synthesis of N-methylaniline and N,N-dimethylaniline from aniline and methanol. Al2O3 catalysts prepared from isopropoxide and nitrate showed high activity and JRC-ALO-1 and JRC-ALO-3 supplied by the Catalysis Society of Japan showed low activity. The highest selectivity for N,N-dimethylaniline was 82.8% with 90.1% aniline conversion. The catalytic activity of Al2O3 was not poisoned by pyridine and CO2.
Stereoselectivity in Diastereomeric Tetrahedral Metal(II) Complexes of Chiral Salicylideneamines: Crystal Structure and Molecular Mechanics Calculation of Bis[N-(l-menthyl)salicylideneaminato]cobalt(II)
Authors: Sakiyama Hiroshi , Okawa Hisashi , Matsumoto Naohide , Kida Sigeo 
Published: July 2006

Abstract
Stereoselectivity of bis[N-(l-menthyl)salicylideneaminato]cobalt(II) [Co(sal-ment)2] has been studied by single crystal X-ray analysis and molecular mechanics calculations. The X-ray analysis has revealed a nearly tetrahedral surrounding (dihedral angle of 82.5°) and Δ configuration about the metal ion. Molecular mechanics calculations were made based on MM2 program, assuming a tetrahedral surrounding about the metal ion and fixing the four donor atoms and six atoms adjacent to the donor atoms at the positions as determined by the single crystal X-ray analysis. The most stable structure obtained from the MM2 calculation coincides well with that from the crystal structure analysis. Together with the X-ray structural results for [Cu(sal-ment)2] and bis[N-[(R)-1-phenylethyl]salicylideneaminato]cobalt(II) [Co(sal-Rmb)2] studied in this study and for related [Zn(sal-Rmb)2] and [Cu(sal-Rmb)2] studied previously, the factors responsible for the stereoselectivities of those bis(salicylideneaminato)metal(II) complexes have been discussed.