bluuebunny/crossref_metadata_2025_split huggingface dataset:
IR Sensing of the Electronic Structure in the Mixed-Valence States of Iron Carbonyl-Attached Biferrocene and Terferrocene
Authors: Hirao Takashi , Aramaki Kunitsugu , Nishihara Hiroshi 
Published: June 2006

Abstract
Ferrocene, 1,1,″-biferrocene and 1,1″ : 1′″,1″″-terferrocene derivatives involving a (cycopentadiene)Fe(CO)3 moiety were synthesized; the ν(CO) peak frequency shifts during their redox processes were monitored by the IRAS technique. All the complexes give two ν(CO) peaks, which shift to higher wavenumbers (12—18 cm−1) by the oxidation from the most reduced (all Fe’s are Fe(II)) to the most oxidized (all Fe’s are Fe(III)) forms. The biferrocene derivative in the monocationic form gives peaks at wavenumbers between those for neutral and dicationic forms, probably because the rate of electron-transfer affording two electronic isomers, Red–Ox–[FeCO] and Ox–Red–[FeCO], where Red, Ox, and [FeCO] refer to reduced and oxidized forms of a ferrocene unit, and a [(η4-cyclopentadiene)Fe(CO)3] moiety, respectively, is slower than or comparable to the time scale of IR (1011—1012 s−1). The terferrocene derivative shows ν(CO) frequency changes corresponding to the three-step 1e− oxidation processes. The shift is most significant in the second oxidation step, implying that the largest change in charge is that of the ferrocene unit nearest to Fe(CO)3. This is in principle consistent with the elucidation of the oxidation process via thermodynamically favorable electronic isomers based on the interaction energy between neighboring oxidized and reduced sites:
Red–Red–Red–[FeCO] → Red–Ox–Red–[FeCO] → Ox–Red–Ox–[FeCO] → Ox–Ox–Ox–[FeCO].
Bis[(methanol){N-salicylidene-N′-(2-phenylimidazol-4-ylmethylidene)-1,3-propanediaminato}nickel(II)] Bridged by Di-μ-phenoxo Moiety and the Deprotonated Imidazolate-Bridged Cyclic-Tetranuclear Complex
Authors: Mimura Masaaki , Matsuo Toshihiro , Matsumoto Naohide , Takamizawa Satoshi , Mori Wasuke , Re Nazzareno 
Published: June 2006

Abstract
Protonated and deprotonated forms of nickel(II) complex with N-salicylidene-N′-(2-phenylimidazol-4-ylmethylidene)-1,3-propanediamine, 1 and 1′, were synthesized and characterized. The X-ray crystal structures of 1·H2O and 1′ were determined: 1·H2O, P21/n (No. 14), a = 11.642(2), b = 12.908(3), c = 15.264(2) Å, β = 96.642(1)°; 1′, I41/a (No. 88), a = 22.651(3), c = 13.950(7) Å. The crystal of 1·H2O assumes a dinuclear structure bridged by the di-μ-phenoxo moiety in an out-of-plane fashion with Ni–Ni = 3.173(1) Å and Ni–O = 2.126(3) Å of the Ni2O2 core and two perchlorate ions as counter anions, in which the nickel(II) ion assumes an octahedral coordination geometry with N3O3 donor atoms consisting of four donor atoms of a quadridentate ligand, a bridging phenoxo-oxygen atom, and an oxygen atom of methanol. A ferromagnetic interaction with J = +7.1 cm−1 operates between the two high-spin nickel(II) ions. 1 undergoes a deprotonation of the imidazole proton under basic conditions to give the deprotonated complex 1′. The crystal of 1′ consists of an electrically-neutral imidazolate-bridged cyclic-tetranuclear molecule with Ni–Ni = 6.339(2) Å and Ni–N = 2.051(7) Å, in which the nickel(II) ion assumes a square-pyramidal geometry with N4O donor atoms consisting of the quadridentate ligand and an imidazolate nitrogen of the adjacent nickel(II) complex. An antiferromagnetic interaction with J = −6.3 cm−1 is observed between the adjacent nickel(II) ions through the imidazolate group. Since the corresponding deprotonated copper(II) complex with the same ligand assumed an imidazolate-bridged zigzag-chain structure, the result with the nickel(II) complex demonstrates a very marked influence of the metal ion on the formation of the assembly structure.
Electronic Effect of Substituents on Cyclopalladation of the Solvated Palladium(II) Complexes with N-Benzyl Triamine [Pd(Sol){(4-XC6H4CH2)NH(CH2)3NR(CH2)3NH2}]2+(Sol = Solvent; R = Ph, H, and Me; X = H, Et, Me, MeO, Cl, and NO2)
Authors: Yagyu Takeyoshi , Iwatsuki Satoshi , Aizawa Sen-ichi , Funahashi Shigenobu 
Published: June 2006

Abstract
The solvated palladium(II) complexes with the potentially cyclopalladating monobenzyl triamine ligand, [Pd(CH3CN)(BnPhdptn)](BF4)2 (1) (BnPhdptn = N-(3-aminopropyl)-N′-benzyl-N-phenyl-1,3-propanediamine), [Pd(CH3CN)(Bndptn)](BF4)2(2) (Bndptn = N-(3-aminopropyl)-N′-benzyl-1,3-propanediamine), [Pd(CH3CN)(4-XC6H4CH2dptn)](BF4)2 (4-XC6H4CH2dptn = N-(3-aminopropyl)-N′-(4-substituted benzyl)-1,3-propanediamine; X = Me (3), MeO (4), Cl (5), and NO2 (6)), and [Pd(CH3CN)(4-XC6H4CH2Medptn)](BF4)2 (4-XC6H4CH2Medptn = N-(3-aminopropyl)-N′-(4-substituted benzyl)-N-methyl-1,3-propanediamine; X = Et (8), Me (9), MeO (10), Cl (11), and NO2 (12)) have been synthesized. The kinetics for the cyclopalladation of 1—6, [Pd(CH3CN)(BnMedptn)](BF4)2 (7) (BnMedptn = N-(3-aminopropyl)-N′-benzyl-N-methyl-1,3-propanediamine), 8—12 in N,N-dimethylformamide (DMF), and 7, 9, 11, and 12 at 25 °C in dimethyl sulfoxide (DMSO) have been investigated. The Hammett ρvalues for the rate constants at 25 °C obtained by variation of the 4-substituent on the benzyl group were −0.73 for 2—6 and −0.87 for 7—12 in DMF, and −0.67 for 7, 9, 11, and 12 in DMSO using the substituent constants for the meta position, σm. The difference in the rate constants for 1, 2, and 7 at 25 °C in DMF and the negative ρ values confirmed that the present cyclopalladation proceeds by the electrophilic attack of the palladium(II) center on the ortho benzyl carbon. We have also discussed the electronic effects of the solvent and the N-substituent of the bound triamine on the ρ values to arrive at a conclusion for the reaction mechanism of [Pd(solvent)(N-benzyltriamine)]-type complexes.
N,N′-Dialkyldiamide-Type Phosphate Protecting Groups for Fmoc Synthesis of Phosphotyrosine-Containing Peptides: Optimization of the Alkyl Group
Authors: Ueki Masaaki , Goto Mitsutaka , Okumura Jin , Ishii Yusuke 
Published: June 2006

Abstract
Synthesis and evaluation of three Fmoc–phosphotyrosine derivatives with a phosphate group protected as N,N′-dialkyldiamide (alkyl = Prn, Pri, and Bui) were studied. All the derivatives were obtained as crystals, among which the Buiderivative (4c) was the best in ease of preparation and excellence in cleavage property. Solid phase synthesis of a methionine-containing peptide, H–Tyr(PO3H2)–Val–Pro–Met–Leu–OH, could be done without any problems.
Syntheses of Phospholipids Containing 2-Nitrobenzyl Ester Moieties at the Terminals of Alkyl Chains and Properties of Photodegradable Liposomes from the Lipids
Authors: Yamaguchi Kazuo , Tsuda Yoshihiro , Shimakage Taka-aki , Kusumi Akihiro 
Published: June 2006

Abstract
Phospholipid 1a bearing 2-nitrobenzyl ester moieties as a photocleavable group at the terminal of alkyl chains was synthesized from the corresponding terminal carboxy-bearing phospholipid 2 by the reaction with 2-nitrophenyl-substituted diazomethane. Phospholipid, 1b bearing α-methyl-2-nitrobenzyl group, 1c bearing 4,5-dimethoxy-2-nitrobenzyl group, and 1d bearing α-methyl-4,5-dimethoxy-2-nitrobenzyl group were similarly synthesized by the use of the respective diazo compounds. The order of photolysis rates of 2-nitrobenzyl ester linkage of phospholipids by ultrahigh-pressure mercury lamp is 1b ≥ 1d &gt; 1a &gt; 1c. Liposomes of 1a—1d containing calcein in the inner aqueous layer were prepared by vortexing, sonication, and gel-filtration. UV irradiation resulted in fast release of the entrapped fluorescence dye. The order of release rates : 1b ≥ 1d &gt; 1c &gt; 1a is consistent with that of photolysis rates except for 1c, which has poor retention of the dye.
Functionalization of Inclusion Cavities of Bile Acid Hosts. Channel-Type Inclusion Compounds of Cholamide
Authors: Sada Kazuki , Kondo Takashi , Ushioda Masahiko , Matsuura Yoshiaki , Nakano Kazunori , Miyata Mikiji , Miki Kunio 
Published: June 2006

Abstract
Clathrate formation and crystal structures of 3α, 7α, 12α-trihydroxy-5β-cholan-24-amide (cholamide) have been investigated. Cholamide forms inclusion compounds with various organic compounds having hydrogen-bond (H-bond) donors. X-Ray crystallographic studies showed that cholamide has bilayer structures with molecular channels. The crystal structures are quite similar to those of channel-type inclusion crystals of cholic acid. Steric dimensions of the host cavities are identical, but cholamide has an H-bond ‘hook’ on the wall of the channels, while cholic acid does not. This difference is correlated with not only the inclusion abilities but also the molecular structures. Two H-bond donors of the amide group yield a hydrophilic inclusion cavity that includes H-bond acceptors, and one H-bond donor of the carboxylic acid gives a lipophilic inclusion cavity that includes non-polar or less polar compounds.
A Facile Synthesis of Trifluoromethylamines by Oxidative Desulfurization–Fluorination of Dithiocarbamates
Authors: Kanie Kiyoshi , Mizuno Katsuya , Kuroboshi Manabu , Hiyama Tamejiro 
Published: June 2006

Abstract
Trifluoromethylamines are easily synthesized from dithiocarbamates by a reagent system consisting of tetrabutylammonium dihydrogentrifluoride and an N-halo imide under mild conditions. When this reaction was applied to dithiocarbamates ArN(R)CS2Me at higher temperatures, the trifluoromethylation was accompanied by halogen substitution at the p-position of the Ar group. The synthesis of trifluoromethyl-substituted adenosine is also described.
Characterization of Electron Deficient Oxide Ion of Heat Treated MgO for Activation of Methane
Authors: Karasuda Takashi , Aika Ken-ichi 
Published: June 2006

Abstract
Electron deficient oxide ions on the heat-treated MgO were characterized by temperature programmed desorption (TPD), X-ray photoelectron spectroscopy (XPS), and other methods (electron spin resonance (ESR) and Fourier transform infrared spectroscopy (FT-IR)). The O1s XP spectrum of MgO evacuated at 873 K has a very small shoulder peak (533.8 eV) at the higher binding energy (BE) side of the O2− peak (at 531.5 eV). Upon the evacuation of 973 K, this shoulder peak increased remarkably, and at the same time H2 started to be evolved (TPD). Since H2 must be produced from a dissolved water in the bulk or surface OH without forming O2, the surface oxygen must have a charge lower than 2. Thus, the shoulder peak was assigned to O−. This state was not observable by ESR and not reactive to methane at room temperature (FT-IR), while O− produced on the UV-irradiated MgO was ESR-observable and reactive. However, the heat-treated surface O− must react with methane during the oxidative coupling of methane (OCM) reaction at 973 K. The two kinds of states for O− on MgO are discussed from the standpoint of the defect chemistry.
Novel Offset Printing without a Developing Process Utilizing the UV-Photodecomposition of Polysilane
Authors: Nagayama Norio , Tachibana Yasuhiro , Yokoyama Masaaki 
Published: June 2006

Abstract
Utilizing a surface modification of polysilane film due to photodecomposition by patterned UV-light irradiation, we have confirmed that polysilanes have a potential application as a material for novel offset printing, which will enable us to skip the alkaline development process required in current offset printing. This has been achieved by a wettability change of photodecomposable polysilane and a modified fountain solution. It has been found that the hydrophilicity in the UV-exposed area is sufficiently maintained by a treatment with tris(2-hydroxyethyl)methylammonium iodide added to the fountain water, which rejects an oil ink in the printing process.
Silicic Acid Polymerization Catalyzed by Amines and Polyamines
Authors: Mizutani Tadashi , Nagase Hisato , Fujiwara Naohiko , Ogoshi Hisanobu 
Published: June 2006

Abstract
Amines, particularly polyamines, catalyzed the polycondensation of silicic acid in water. The resultant gel contained these polyamines with a N/Si molar ratio of up to 0.5. IR and powder X-ray studies showed that silica gel and polyamines are hybridized at a molecular level through hydrogen bonding. The gel adsorbed anionic dyes from water, whereas normal silica gel adsorbs cationic dyes. Induced CD was observed for the indigo carmine adsorbed on silica gel–poly(l-lysine) hybrid, showing that the hybrid provides a chiral environment to the adsorbate.
Stereoselection without Steric Effect but Controlled by Electronic Effect: Important Contribution of Ground State
Authors: Ohno Atsuyoshi 
Published: June 2006

Abstract
Stereoselectivity controlled by an electronic effect but not by a steric effect is presented. A modern concept of stereochemistry is proposed where stereochemistry is controlled by acceleration of the reaction instead of deceleration, as has been proposed based on classical concept. The mechanism of (net) hydride transfer from a dihydronicotinamide adenine dinucleotide (NADH)/dihydronicotinamide adenine dinucleotide phosphate (NADPH) analogue to certain oxidizing agents is discussed in relation to this modern stereochemistry concept. The reaction involves a preassociation complex where the stereochemistry of the reaction is defined. Only a complex that has appropriate intermolecular arrangement can proceed to the transition state. The difference in free energy between the two stereoisomers of the preassociation complex contributes to almost all of the difference in the free energy of activation for the stereoisomers in the transition state, then to the ratio of stereoisomers in the product. Thus, the transition state does not participate in determining the stereochemistry of the reaction.
Similarities between the present and enzymatic reactions from the viewpoint of the reaction scheme are also suggested.
Maturity of Finite Groups. An Application to Combinatorial Enumeration of Isomers
Authors: Fujita Shinsaku 
Published: June 2006

Abstract
The maturity of a finite group G is defined by examining how a dominant class (Q-conjugacy class) corresponding to a cyclic subgroup H contains conjugacy classes. If the ingeter q = |NG(H)|/|CG(H)| (called the maturity discriminant) is less than an Euler function φ(|H|), the group |G| is concluded to be unmatured concerning H, where NG(H) and CG(H) respectively denote the normalizer and the centralizer of H within G. A matured representation defined for a matured or an unmatured group is subduced into cyclic subgroups to give the corresponding monomials, which are applied to the combinatorial enumeration of isomers.
Structure of Liquid Chloroform as Investigated by Energy-Dispersive X-Ray Diffraction
Authors: Takahashi Akinori , Yano Yohko F , Iijima Takao 
Published: June 2006

Abstract
The structure of liquid chloroform has been investigated by energy-dispersive X-ray diffraction. For the stability of the sample thickness, even for a volatile liquid, a glass capillary tube has been used as a sample container. The intensity function has been accounted for by a bcc (body-centered cubic)-like local lattice structure model with a lattice constant of 6.24 Å. However, it has been necessary to replace a fraction (34%) of the nearest neighbors by super-near configurations in which molecules are rather tightly correlated. The correlation is, however, rapidly lost as the distance between molecules increases, and the long range structure is characterized by a large Prins parameter. The structure of liquid chloroform is much less ordered than that of carbon tetrachloride.
Ab Initio Size-Consistent Calculations of Effective Exchange Interactions in Mesoscopic Magnetic Clusters Composed of Triplet Methylenes and Quartet Nitrogen Atoms
Authors: Kawakami Takashi , Yamanaka Syusuke , Takano Yu , Yoshioka Yasunori , Yamaguchi Kizashi 
Published: June 2006

Abstract
The electronic structures of linear magnetic clusters composed of eleven triplet methylenes, eleven quartet nitrogen atoms, and five triplet methylenes plus six quartet nitrogen atoms were investigated by the unrestricted Hartree–Fock (UHF), post UHF and their spin-projected wavefunctions in combination with the Heisenberg model. The effective exchange integrals (Jab) in the Heisenberg model were calculated by the difference between the total energies of the highest spin (HS) and lowest spin (LS) UHF-based wavefunctions of the clusters. The Jab values by the UHF-based and spin-polarized DFT methods were compared with those of the SO-Cl, MRSDCI, CASSCF, CASPT2, and MRMP2 calculations in the case of small linear clusters, such as a triplet methylene dimer. The spin-polarized density functional (BLYP and B3LYP) calculations followed by the size-consistent spin projection were carried out for dimer, trimer, and clusters with eleven magnetic sites to obtain the Jab values, since the DFT methods were heavily utilized in solid state physics. It was found that all of the methods, except for DFT, provide similar Jab values in the magnetic region of the dimer, where the interatomic distance is longer than 3.0 Å. However, the spin crossover from the LS state to the HS state occurs at a larger distance in the cases of MRSDCI and MRMP2. The spin projection for LS spin-polarized wavefunctions becomes less important in the case of long linear clusters, such as (CH2)11. The DFT results are generally biased to stabilize the low-spin states. The implications of the calculated results are discussed in relation to the molecular magnetisms in mesoscopic molecular aggregates.
Molecular Structures of Some syn-[1.1]Metallocenophanes, anti-Ferrocenium[1.1]ruthenocenophane, and Their NMR Spectroscopies
Authors: Watanabe Masanobu , Sato Masaru , Nagasawa Akira , Motoyama Izumi , Takayama Toshio 
Published: June 2006

Abstract
The structures of ferroceno[1.1]ruthenocenophane-1,13-dione (1a) and related compounds have been analyzed by X-ray diffraction. The crystal form of 1a is orthorhombic, space group Pbc21, a = 6.0660(3), b = 13.371(1), c = 19.420(2) Å, V = 1575.1(2) Å3, and the final R = 0.043 and Rw = 0.054. The air-oxidation of ferroceno[1.1]ruthenocenophane (2a) in xylene at 400 K gives ferroceno[1.1]ruthenocenophane-1-one (3a), implying the oxidation of the methylene group to a carbonyl group. The crystal form of 3a is orthorhombic, space group Pbn21, a = 7.6460(7), b = 10.708(1), c = 19.587(2) Å, V = 1603.7(3) Å3, and the final R = 0.052 and Rw = 0.051. The same oxidation is found for [1.1]ferrocenophane (2b) giving [1.1]ferrocenophane-1-one (3b). The crystal form of 3b is orthorhombic, space group Pbnm, a = 7.5460(9), b = 10.6560(6), c = 19.8290(7) Å, V = 1594.4(2) Å3, and the final R = 0.070 and Rw = 0.077. All the structural data of 1a, 3a, and 3b showed their syn conformation about two bridging methylene groups and rigid structures caused by the good planarity of C5H4COC5H4 and C5H4CH2C5H4 planes. These rigid structural features give remarkable variable temperature NMR (VT-NMR) spectra caused by the appropriate rate constant of syna⇔synb motion in solutions. The ΔG‡(Tc) values of the motion are estimated to be about 60 kJ mol−1, which is more than six times larger than those of 2a and 2b. The anti-form of ferrocenium[1.1]ruthenocenophane formulated as [FeIII(C5H4CH2C5H4)2RuII]PF6 (4) was prepared by the oxidation of the syn-form 2a in sulfuric acid containing NH4PF6. This is the first example of the oxidative occurrence of the conformational change from syn- to anti-form. The crystal form of 4 is triclinic, space group P1, a = 9.350(2), b = 10.777(3), c = 10.980(3) Å, α = 91.84(3)°, β = 96.66(2)°, γ = 111.12(2)°, V = 1021.8(5) Å3 and the final R = 0.044 and Rw = 0.048. The cation contains largely twisted C5H4CH2C5H4 plane (the twist angle, 34.1—38.5°) and largely tilted and rotated Cp-rings of the Ru(C5H4)2 moiety.
Preparation, Characterization, and Some Properties of Novel Dinuclear Complexes with a Coordinated Bridging Disulfide Bond. Crystal Structures of ΔRΛS-[M2(2-aminoethanethiolato)4(cystamine)]2+ (M = IrIII, RhIII)
Authors: Miyashita Yoshitaro , Sakagami Narumi , Yamada Yasunori , Konno Takumi , Okamoto Ken-ichi 
Published: June 2006

Abstract
Novel dinuclear complexes, [M2(aet)4(cysta)]2+ (M = IrIII (1), RhIII (2); aet = NH2CH2CH2S−, cysta = NH2CH2CH2SSCH2CH2NH2), were prepared by the oxidation reactions of fac(S)-[M(aet)3]. The crystal structures of the complexes were determined by X-ray diffractions: 1Cl2·4H2O, monoclinic, P21/a, a = 12.427(2), b = 8.879(1), c = 13.387(1) Å, β = 91.947(10)°, V = 1476.3(3) Å3, Z = 2, and R = 0.031; 2Cl2·2H2O, monoclinic, P21/c, a = 11.788(2), b = 8.485(1), c = 14.800(2) Å, β = 112.980(9)°, V = 1362.9(3) Å3, Z = 2, and R = 0.023. In the structures of 1 and 2, two octahedral fac(S)-[M(aet)3] units are linked by a coordinated disulfide bond. Their disulfide sulfur atoms are bound to the Ir and Rh atoms more strongly than to the Co atom. Both complexes 1 and 2 take only the ΔRΛS configuration of ten possible isomers. The electronic absorption, 13C NMR, and infrared spectra exhibit characteristic behavior in relation to the disulfide bond. 1 and 2 are fairly stable in water, and their structures in solid are retained in solution. The reduction or oxidation of the dinuclear complexes causes a cleavage of the disulfide bond to afford the mononuclear thiolato or sulfinato complexes. The properties of the present complexes are also discussed in comparison with those of the mononuclear and/or polynuclear complexes with the corresponding metal ions.
Dinitrogen Tetraoxide Complexes of Iron(III) and Copper(II) Nitrates as Versatile Reagents for Organic Syntheses. Efficient Oxidative Deprotection of Silyl or Tetrahydropyranyl Ethers, Acetals, and Thioacetals
Authors: Firouzabadi Habib , Iranpoor Nasser , Zolfigol Mohammad Ali 
Published: June 2006

Abstract
Fe(NO3)3·1.5N2O4 and Cu(NO3)2·N2O4 are efficient reagents for oxidative deprotection of various silyl and tetrahydropyranyl ethers, acetals, and thioacetals in aprotic organic solvents. Fe(NO3)3·1.5N2O4 is also able to perform the reactions efficiently in the absence of solvents at room temperature. Over-oxidation of the products has not been observed in these reactions. A synergic effect of N2O4 upon the oxidation abilities of metal nitrates is observed.
Lewis Acid-Promoted Disproportionation Reaction of Aromatic Vinyl Ethers and Acetals and Its Application to the Synthesis of Paracotoin
Authors: Gong Young Dae , Tanaka Hiroko , Iwasawa Nobuharu , Narasaka Koichi 
Published: June 2006

Abstract
Aromatic vinyl ethers and acetals underwent a novel addition-fragmentation reaction affording olefins and esters in the presence of a Lewis acid. This reaction was applied to intramolecular cyclization reaction, giving five or six membered ring compounds in good yields. Paracotoin, an intermediate in the biosynthesis of shikimic acid, was synthesized using this cyclization reaction as the key step.
Saccharide Induction of Chiral Orientation of the Aggregate Formed from Boronic-Acid-Appended Amphiphiles
Authors: Kimura Taro , Takeuchi Masayuki , Shinkai Seiji 
Published: June 2006

Abstract
A boronic-acid-appended amphiphile bearing an azobenzene chromophore at the chain center, N-[4-(dihydroxyboryl)benzyl]-N-(10-{4-[(4-dodecyloxyphenyl)azo)]phenoxy}decyl)-N,N-dimethylammonium bromide (4) was synthesized. In aqueous media, compound 4 formed a scarcely-oriented aggregate in the absence of saccharides, but in the presence of saccharides the boronic acid groups formed saccharide complexes and the resultant amphiphiles formed well-ordered aggregates. The ΔH value in DSC depended on the inherent structure of the added saccharides. Although d-glucose and methyl α-d-glucopyranoside could only form less ordered aggregates, d-fructose and d-xylose formed well-ordered aggregates. The saccharide complexes with 4 became CD-active with the appearance of exciton-coupling bands inherent to the saccharides. The CD band intensity was increased with increasing saccharide concentration but decreased by a further increase in the saccharide concentration. These results indicate that the reversible boronic acid–saccharide interaction is useful to induce the chirality in the ordered aggregate structure, where saccharides are used as a trigger for the chiral induction.