ESR Studies of the Negative Ions of Biphenyl Derivatives. IV. Conformation of 4,4′-Polymethylenebiphenyl Anion Radicals
スポンサーリンク
概要
- 論文の詳細を見る
The electron spin resonance has been observed for anion radicals of 4,4′-polymethylene bridged biphenyls which have various lengths of the polymethylene chain, from the carbon number of <I>n</I>=11 to that of <I>n</I>=16. The relation between the chain length of the methylene bridge and the ring-proton splitting were studied in order to see how the polymethylene span brings on a strain in the biphenyl ring. The geometrical structures of the <I>sp</I><SUP>3</SUP>-hybrid bond of the β-carbons were investigated on the basis of the observed values of the β-proton splitting in each derivative. In the cases of both pentadeca and hexadeca derivatives, the magnitude of both the <I>ortho</I>- and the <I>meta</I>-ring proton splitting are comparable with those of the 4,4′-diethylbiphenyl anion radical, the open-chain model of the present derivatives. A rotation of the β-methylene <I>sp</I><SUP>3</SUP>-bond is forbidden in this case, however, and the coupling constants of the β-methylene protons no longer exhibit an equivalent value; that is, two of these C–H bonds are placed on a coplanar biphenyl plane, but the others are twisted out by about 30° from the 2<I>p<SUB>z</SUB></I> axis of the ring-carbon atom. When the number of the methylene groups is reduced from thirteen to twelve, the magnitude of the <I>ortho</I>-ring proton coupling constant is greatly reduced. The HMO calculations of the spin density were carried out. The observed tendency of the ring-proton splitting can be qualitatively understood on the assumption that the coplanar biphenyl ring may be modified by twisting the phenyl groups about the central 1-1′ bond rather than by slanting them together against the original aromatic plane. A strong beam of the polymethylene chain also causes a modification of the geometrical structure of the β-methylene <I>sp</I><SUP>3</SUP> bond and results in a reduction of the β-proton coupling constant to a large extent.
- 公益社団法人 日本化学会の論文
著者
-
Ishizu Kazuhiko
Department Of Chemistry Faculty Of Science Ehime University
-
Nakazaki Masao
Department Of Chemistry Faculty Of Engineering Science Osaka University
-
Hasegawa Hideo
Japan Electron Optics Laboratory
-
Nemoto Fujito
Department of Chemistry, Faculty of Science, Ehime University
-
Nemoto Fujito
Department of Chemistry, Faculty of Science, Ehime University Bunkyo-cho
-
Yamamoto Koji
Department of Cardiology, Nagoya City University Medical School
関連論文
- Pneumatosis Cystoides Intestinalis Induced by the Alpha-glucosidase Inhibitor Miglitol
- Stress-induced PAI-1 expression is suppressed by pitavastatin in vivo
- Analysis of Expression Profiles of Islet-associated Transcription and Growth Factors During β-Cell Neogenesis from Duct Cells in Partially Duct-ligated Mice
- β Cell Neogenesis from Ducts and Phenotypic Conversion of Residual Islet Cells in the Adult Pancreas of Glucose Intolerant Mice Induced by Selective Alloxan Perfusion
- Overexpression of the Aldose Reductase Gene Induces Apoptosis in Pancreatic β-Cells by Causing a Redox Imbalance
- Identification of amino acid residues responsible for von Willebrand factor binding to sulfatide by charged-to-alanine-scanning mutagenesis
- Immunohistochemical Localization of Betacellulin a New Member of the EGF Family in Normal Human Pancreas and lslet Tumor Cells
- Safety and Efficacy of Autologous Progenitor Cell Transplantation for Therapeutic Angiogenesis in Patients With Critical Limb Ischemia
- Recurrent Intramural Hematoma of the Small Intestine in a Severe Hemophilia A Patient with a High Titer of Factor VIII Inhibitor : A Case Report and Review of the Literature
- Clinical Protocol for Angiogenesis by Intramyocardial Injection of Autologous Bone Marrow Mononuclear Cells in Patients With Severe Coronary Artery Disease : TACT-NAGOYA-HEART
- Therapeutic Angiogenesis by Autologous Bone Marrow Cell Transplantation : Limited Efficacy in Patients with Long-term Hemodialysis(Angiogenesis 5 (M), The 69th Annual Scientific Meeting of the Japanese Circulation Society)
- COLONOSCOPIC EXTIRPATION OF WHIPWORMS IN PATIENT WITH ACUTE ABDOMEN-LIKE SYMPTOMS
- A Case of Penetration of the Large Intestinal Wall by a Toothpick
- A Case of a Giant Lipoma of the Duodenal Bulb
- Formation of Filamentous Appendages by Acinetobacter sp. Tol 5 for Adhering to Solid Surfaces(MICROBIAL PHYSIOLOGY AND BIOTECHNOLOGY)
- Intravenous Three-dimensional CT Portography Using Multi-detector Row CT in Patients with Hepatic Cirrhosis : Evaluation of Scan Timing and Image Quality
- Syntheses of Novel Cyclotriveratrylenophane Capsules and Their Supramolecular Complexes of Fullerenes
- Syntheses of Novel Fullerene Tweezers and Their Supramolecular Inclusion Complex of C_
- Supramolucular Inclusion Complexes of Fullerenes Using Cyclotriveratrylene Derivatives with Aromatic Pendants
- OE-350 Drug Eluting Stent Suppressed the Elevation of Plasma Levels of MCP-1 and IL-8 in the Early Period after PCI(Restenosis basic/clinical-1, The 71st Annual Scientific Meeting of the Japanese Circulation Society)
- Reliability of Plasma Brain Natriuretic Peptide Concentration as a Surrogate Endpoint : Is it Stable in Stable Patients?(Heart Failure, Clinical 11 (M), The 69th Annual Scientific Meeting of the Japanese Circulation Society)
- Effects of Carvedilol on Plasma Brain Natriuretic Peptide Concentration in Patients with Isolated Diastolic Heart Failure
- Relationship between Iodine-123 Metaiodobenzylguanidine Myocardial Imaging and Plasma Brain Natriuretic Peptide Concentration in Patients with Isolated Diastolic Heart Failure
- Extract of Cassia nomame has effect on the cell cycle of CHO-K1 cells and suppresses chromosome aberrations induced by Mitomycin C
- Facilitated Transport of Carbohydrates Across an Anion-exchange Membrane Fixed with Borate Ion
- Synthesis and Properties of Head-to-head,Head-to-tail,and Tail-to-tail Orientational Isomers of Extended Dihexylbithiophene-Octaethylporphyrin System [OEP-(DHBT)_n-OEP] Connected with 1,3-Butadiyne Linkages
- Involvemtnt of Ammonia Maintenance of Cytosolic Glutamine Synthetase Activity in Pisum sativum Nodules
- OE-136 Predictors of Responders in Therapeutic Angiogenesis Using Bone Marrow Mononuclear Cell Transplantation (TACT) for Critical Limb Ischemia(Peripheral circulation-1 (H) OE23,Oral Presentation (English),The 70th Anniversary Annual Scientific Meeting o
- PJ-726 Factors Associated with Urinary Excretion of Albumin in Patients with Essential Hypertension(PJ122,Hypertension, Clinical 3 (H),Poster Session (Japanese),The 73rd Annual Scientific Meeting of The Japanese Circulation Society)
- PJ-596 Endothelial Dysfunction is a Potential Mechanism for Cardio-Renal Connection(PJ100,Kidney/Renal Circulation/CKD 5 (H),Poster Session (Japanese),The 73rd Annual Scientific Meeting of The Japanese Circulation Society)
- Magnetic Susceptibility of Yang's a Biradical from 4.2 to 293°K
- Optimum Practical Design of Distributed and Asynchronous Power Control for Wireless Networks with Shared Bands(Multi-dimensional Mobile Information Networks)
- Synthesis and Structural and Electronic Properties of the Mixed Complexes of Vinylene-Bridged Bis- and Tris(octaethylporphyrin)s with Ni(II), Pd(II), and Pt(II) Ions
- A DYNAMICAL PROFILE OF METAL INCORPORATION TO A LIPOSOMAL MEMBRANE AS STUDIED BY ELECTROM SPIN RESONANCE
- An Attempted Synthesis of [7][7]Circulene: Synthesis and Characterization of Triple-Layered [2.2]Phenanthreno[2.2]naphthalenophenanthrenophane
- The Synthesis of a [13][15]Fulvalene Derivative
- Proapoptotic Action of p53-Tom5 in p53-Resistant A549 Human Non-small Cell Lung Cancer Cells through Direct Mitochondrial Dysfunction
- The Suppressing Effect of the Extract from Cassia nomame on Clastogenicity and Cytotoxicity of Mitomycin C in CHO Cells
- Osmotic and Non-osmotic Induction of Somatic Embryogenesis by Sucrose at High Concentrations in Daucus carota L
- Effects of Graded Levels of Dietary Casein and Corn Oil on Total Cholesterol and Triacylglycerol in Plasma and Liver of Rats
- Reactions of Sulfoxides with Magnesium Amides.Transformation of Sulfoxdies into Sulfides, Dithioacetals, and Vinyl Sulfides
- Nuclear localization of alkaline phosphatase in cultured human cancer cells
- Synthesis and Properties of Nucleic Acid Analogues with Peptide Backbone
- Synthesis and Characterization of Hepta [5] [5] circulene as a Subunit of C_ Fullerene
- Generation of transgenic mice for conditional overexpression of Sox9
- B-6-2 The Structure of Torilolone(Terpenoids)
- A novel technique for impaction bone grafting in acetabular reconstruction of revision total hip arthroplasty using an ex vivo compaction device
- Clinical significance of serum adiponectin in Japanese diabetic patients
- Cemented total hip arthroplasty with subtrochanteric femoral shortening transverse osteotomy for severely dislocated hips : outcome with a 3- to 10-year follow-up period
- Relationship between serum cystatin C and serum adiponectin level in type 2 diabetic patients
- A case of mitochondrial kidney disease with insulin resistance and hypoadiponectinemia
- The Absolute Configuration of (−)-N,N-Dimethyl-1,2-diphenylethylamine and its Analgesic Activity
- A Case of the Kugelberg-Welander Syndrome Complicated with Cardiac Lesions
- On the Absolute Configuration of threo-1,2-Diphenyl-2-hydroxyethylamine
- The ESR and ENDOR spectra of the [2.2](2,7)pyrenophane anion radical.
- The synthesis of dibenzo-annelated annulenes using reductive coupling. Bisdehydrodibenzo(14)-, -(16)-, -(18)-, -(20)-, and -(22)annulene.
- The synthesis of a double-layered annulene with 10.PI.-rings. 1,1:2,2-bis([10]annulene-1,6-diyl)ethylene.
- Stopped-flow investigation of antioxidant activity of tocopherols.
- ESR Studies of the Cation Radicals Produced by SbCl5 Oxidation of Some Biphenyls with ortho- and para-Dialkyl Substituents
- Optical Activity and Absolute Configuration of 2,3 :6,7-Dibenzobicyclo [3.3.1]nona-2,6-diene Derivatives
- Absolute configurations of novel axially dissymmetric 10,10'-dihydroxy-9,9'-biphenanthryl and its related compounds.
- Stabilization energy and spin distribution in pyrenophane cation radicals.
- ESR Study of Spin-Spin Interactions in Verdazyl Biradicals. II
- ENDOR studies of the complexation reaction between spin-labeled crown ether and alkali metal salts.
- ESR and ENDOR studies of cation radicals derived from benzodipyran compounds. Structure and dynamic behavior of heterocyclic ring in tocopherol (vitamin E).
- ENDOR studies on low-symmetry triphenylmethyl with ortho or para-methoxy substituents.
- Hindered Rotation in [12]Paracyclophanes
- The Synthesis and Absolute Configuration of Optically Active Tricyclo[4.3.0.03,8]nonane (Twist-brendane)
- ENDOR studies of the hyperfine interaction of phenylgalvinoxyl radicals in solution.
- Syntheses of Tetracyclo[7.3.0.03,7.04,10]dodecane-2,8-dione ("[8]Diisotwistane-2,8-dione") and8,9-Benzotricyclo[4.3.1.03,7]decane ("Benzoisotwistane")
- Diazomethane ring-expansion of (-)-D3-trishomocubanone. Preparation and chiroptical properties of a series of (m.1.1)triblattanes.
- Synthesis of chiral crown ethers derived from trans, trans- and cis, trans-2,2'-spirobiindan-1,1'-diols. Their chiral recognition and complexation properties.
- ESR spectra of radical ions generated from 5,10-dihydroindeno(2,1-a)indene.
- Optical spectra of tocopheroxyl model radicals.
- ESR 13C Hyperfine Structures of the Meta-substituted t-Butyl Biphenyl Anion Radical
- Synthesis of 6-O-acyl derivatives of immunoadjuvant active N-acetylmuramyl-L-alanyl-D-isoglutamine.
- Carbon-13 Nuclear Magnetic Resonance Studies of Biphenyl Derivatives II. FT–NMR of Halobiphenyls
- Spin label investigation of the crown ether. Complex formation between the veratrole analogue of phenoxyl-labeled benzo-15-crown-5 and alkali and alkaline earth metal salts in frozen solution.
- The dynamical behavior of the sodium cation in some crown ether-Na+-TCNE- ternary complexes as studied by ESR.
- Anomalous Magnetic Properties of Crystalline Galvinoxyl Radical. IV. Effect of the Deuterium Substituent
- ESR Investigation of alkali metal complexes of galvinoxyl-labeled benzo-15-crown-5 in frozen solution.
- Copper(II)-Rare Earth(III)(Ln=La,Gd,Lu) Binuclear Complexes of Bis(2-(3-carboxysalicylidene)aminoethyl)amine: Characterization and Specific Binding of Amino Alcohols.
- Carbon-13 Magnetic Resonance Chemical Shifts in Alkylbiphenyls
- ESR Studies of the Negative Ions of Biphenyl Derivatives. IV. Conformation of 4,4′-Polymethylenebiphenyl Anion Radicals
- ENDOR Studies on the Hindered Alkylbiphenyl Anion Radicals
- ENDOR Studies in the Conformation of 3,3′- or 3,4′-Polymethylenebiphenyl Anion Radicals.
- ESR and ENDOR studies of the hindered internal rotation of higher alkyl groups. 2,6-Di-t-butyl-4-alkylphenoxyl radicals.
- ESR studies of temperature dependent zero-field splitting in yang's biradical.
- The Cadmium-photosensitized Decomposition of Acetaldehyde, Propionaldehyde, and n-Butyraldehyde