Table Of Content

Contents of Volume 33 NUMBER | JANUARY 1995 Editorial H. GUNTHER Detailed Characterization by Two-Dimensional NMR of Two Unusual Bicyclo[2.2.2]octenedione Derivatives Produced by the Reaction of Perezone with Thiourea W. F. REYNOLDS, M. YU, B. ORTIZ, A. RODRIGUEZ, F. YUSTE, F. WALLS, R. G. ENRIQUE AND D. GNECCO 31P and ”Se CP/MAS and *!P CPECHO Solid-State NMR Studies of Bis(Dineopentoxythio- phosphoryl) Diselenide and Disulphide M. J. POTRZEBOWSKI Oxidation of 4-Methylcatechol by Dioxygen Studied by ESR Spectroscopy. The Different Regio- selectivity of OH” and MeO Nucleophilic Attack and Kinetic Deuterium Isotope Effects 15 M. S. DAVIS, B. MILE, C. C.R OWLANDS AND M. D. BARRATT Applications of °F NMR Spectroscopy to the Study of Equilibrium Dynamics of Uranyl(2+)- Fluoride Complexes 20 Z. SZABO AND J. GLASER 3C NMR Studies of Some Dialkyl a-Anilinobenzylphosphonates and Dialky! a-Aniline-(2-hydroxy- benzyl)phosphonates 27 M. CURIC, LJ. TUSEC-BOZIC AND D. VITIC-TOPIC 1D and 2D 'H NMR Studies of Iron(III) Complexes on Geoporphyrins of the Deoxophylloerythroetio Structural Type Derived from Oil Shale S. WOLOWIEC, L. LATOS-GRAZYNSKI, O. V. SEREBRENNIKOVA AND F. CZECHOWSKI Comparative Multinuclear (Cl, ”Br, *'Br, 7’ and '"O) Magnetic Resonance Study of the Perhalate Anions XO, (X = Cl, Br or I) in Acetonitrile Solution M. F. A. DOVE, J. C. P. SANDERS AND E. H. APPELMAN NMR Study of Iminophosphine Oligomers by *'P,'°N and *'P,"°C Heteronuclear Shift Correlation 59 D. GUDAT, M. LINK AND G. SCHRODER NMR Visibility of Cl" in Human Erythrocytes F. G. RIDDELL AND Z. ZHOU EPR Study of Bi-, Ter-, and Quaterthiophene Radical Cations 70 B. KIRSTE, P. TIAN, G. KOSSMEHL, G. ENGELMANN AND W. JUGELT Solid-State Mercury-199 NMR of Hexakis(dimethylsulphoxide)mercury(II) Trifluoromethane- sulphonate: a New Standard for Mercury-199 CP/MAS Experiments 77 J. M. HOOK, P. A. W. DEAN AND L. C. M. VAN GORKOM Book Review, 80; Announcements, 81; Papers in Press, 83 NUMBER 2 FEBRUARY 1995 2D NMR Structure Elucidation of Proanthocyanidins: the Special Case of the Catechin-(4a-8)- catechin-(4a-8)-catechin Trimer L. BALAS, J. VERCAUTEREN AND M. LAGUERRE ili iV CONTENTS OF VOLUME 33 Complete Assignment and Additivity Rule for 'H and ‘°C Chemical Shifts of Non-planar Nonacyclic Aromatic Hydrocarbons T. UEDA, S. IWASHIMA, J. AOKI AND M. TAKEKAWA ‘1H NMR Chiral Analysis of Benzhydrylamine Derivatives Using B-Cyclodextrin. Solution Geometry of Host-Guest Complexes as Determined by 1D NOE and ROESY Experiments J. REDONDO, J. FRIGOLA, A. TORRENS AND P. LUPON Conformational Analysis of Benzoannulated Nine-Membered Rings. Part 4—7,8-Dihydro-6H- dibenzo[f,h][1,5]dioxonin and its Derivatives B. RYS AND H. DUDDECK Solid State *C NMR Investigations of Monosubstituted Cyclohexanes in Thiourea Inclusion Com- pounds K. MULLER NMR Studies of Exchanging Amide Protons in 1-Desamino-8-D-argininevasopressin by Selective Hartmann—-Hahn Transfer K. ZANGGER AND H. STERK Approach to the Conformational Behaviour of Tetraazamacrocycles in the Solution State. NMR and Molecular Modelling Studies R. BOETZEL, S. FAILLA, P. FINOCCHIARO AND G. HAGELE Multinuclear Magnetic Resonance Study of Some Mesoionic 1,3,4-Triazoles W. BOCIAN, J. JAZWINSKI, L. STEFANIAK AND G.’A. WEBB Electric Field Effects on the Shielding of Protons in C—H Bonds M. GRAYSON AND W. T. RAYNES Gradient-Enhanced SELINCOR for Selective Excitation in a °C Resolved COSY Experiment T. FACKE AND S. BERGER C1/"Cl One-Bond Isotope Effects on °C Chemical Shifts in a Series of para-Substituted Chioro- benzenes M. S. MORALES-RIOS, C. GARCIA-MARTINEZ, P. JOSEPH-NATHAN AND L. G. ZEPEDA Short Communications Use of Cross Polarisation in Lithium-6 Solid-State NUR R. K. HARRIS AND A. P. MINOJA Pulsed Field Gradient One-Dimensional NMR Selective ROE and TOCSY Experiments C. DALVIT AND G. BOVERMANN Letter to the Editor Determination of *'P,*'P Coupling Constants and Their Relative Signs in Symmetrical Diphos- phonates by 2D NMR Spectroscopy H. BECKMANN, G. GROSSMANN AND G. OHMS Papers in Press, 162 NUMBER 3 MARCH 1995 NMR Investigation of the Intramolecular Distribution of Deuterium in Natural Triacylglycerols A. LAI, M. CASU, G. SABA, F. P. CORONGIU AND M. A. DESSi CONTENTS OF VOLUME 33 Conformational and Configurational Study of 1,3-Dioxolanes by Proton and Carbon NMR Spectroscopy A. MUCCI, L. SCHENETTI, L. BRASILI AND L. MALMUSI 19F NMR Investigations of Cobalt(II) Complexes with Cysteine-Containing Peptide Ligands W.-Y. SUN, T. UENO, N. UEYAMA AND A. NAKAMURA Concerted Application of a Shift Reagent and 2D NOESY to the Structure Determination of New Natural Products from the Tropical Brown Alga Dictyopteris delicatula G. M. KONIG AND A. D. WRIGHT Stereochemistry and Synthesis of Precursors to Strigol Analogues G. TOTH, J. HALASZ, I. KADAS, G. ARVAI, K. MIKLO AND R. HAESSNER Indirect Detection of Selenium-77 in Nuclear Magnetic Resonance Spectra of Organoselenium Compounds T. B. SCHROEDER, C. JOB, M. F. BROWN AND R. S. GLASS Long-Range Proton—Carbon Coupling Constants. Part II—Norbornene Systems T. PARELLA, F. SANCHEZ-FERRANDO AND A. VIRGILI Complete Spin Dynamics of the AX, AX, and AX, Spin Systems. Application to BIRD Pulses A. D. BAIN, I. W. BURTON, K. A. CARPENTER, J.-P. YANG AND W. F. REYNOLDS Two-Dimensional 'H-'H and “C-'H Maximum-Quantum Correlation NMR Spectroscopy with Application to the Assignment of the NMR Spectra of the Bile Salt Sodium Taurocholate M. LIU, R. D. FARRANT, J. C. LINDON AND J. K. NICHOLSON High Resolution Solid-State "Na NMR of Anhydrous Sodium Sulfite W. P. POWER Note Complete 'H and °C NMR Assignments of Two Steroid 5,68-Epoxides using 1D TOCSY and 2D HMQC TOCSY Experiments D. E. OVER, M. BARDET, J.-C. MARCHON AND R. RAMASSEUL Reference Data 1H and °C NMR Spectra of Spiramycin I in Organic and Aqueous Solutions P. ALAM, J. BARBER, R. J. BRENNAN, K. KENNEDY AND M. H. H. TEHRANI Assignment of the 'H NMR Resonances of p-glycero-p-ido- and p-glycero-p-altro-Octulose Mono- and Bisphosphates I. L. FLANIGAN, J. G. COLLINS, K. L. GRAHAM, J. K. MACLEOD AND J. F. WILLIAMS Two-Dimensional NMR of Sesquiterpenes. 8—Complete Assignment of 'H and °C NMR Spectra of Seven Sesquiterpene Alcohols from Neocallitropsis pancheri P. RAHARIVELOMANANA, J.-P. BIANCHINI, A. CAMBON, M. AZZARO AND R. FAURE Book Review, 236; Announcements, 237; Papers in Press, 238 NUMBER 4 APRIL 1995 OQ NMR Spectra and Conformation of Cyclic Vinyl Ethers E. TASKINEN AND M. ORA vi CONTENTS OF VOLUME 33 31P NMR Spectroscopic Investigation of Exchange Processes in Two Bifunctional Aminophosphonates R. BOETZEL, S. FAILLA, P. FINOCCHIARO AND G. HAGELE MBOHO Calculations of Carbon-Nitrogen Nuclear Spin-Spin Coupling Constants Z.-M. HU AND C.-G. ZHAN Conformations and Conformational Processes of Pelargolactam G. BORGEN, J. DALE, F. RISE AND L.-L. GUNDERSEN 7 NMR Study of p-z Conjugation in Methoxybutadienes and Related Compounds E. TASKINEN Electron-Nuclear Relaxation Time T,, for Intramolecular Distance Evaluation F. CINGET, P. H. FRIES, U. GREILICH AND P. J. A.V OTTERO NMR of Terminal Oxygen. 15—'70 NMR Spectra of the N‘—O~ Group: tert-Amine Oxides R,NtO , Nitrones —HC—=N*t(—O—) , Azoxy Derivatives —N—N*t(—O—) , Nitrile Oxides —C=N*—O° and Related Compounds. Shielding Anisotropy in Linear Heteroatomar 7z-Systems H. DAHN, P. PECHY, V. V. TOAN AND P.-A. CARRUPT Eupomatenoids from Caryodaphnosis tonkinensis and Their Complete NMR Assignment U. HIMMELREICH, H. RIPPERGER, G. ADAM, N. H. ANH AND T. V. SUNG Vitamin B-6 Model Reactions. Part VI—A Hammett Relationship for the Magnitude of Pseudoallylic Proton—Proton Spin Coupling Constants in Substituted Azomethines J. R. FISCHER AND E. H. ABBOTT Complete 'H and °C NMR Assignment of ent-38,16a-Atisanediol, a Cytotoxic Diterpene Isolated from the Sponge Spirastrella cunctatrix F. CAFIERI, E. FATTORUSSO, Y. MAHAJNAH AND A. MANGONI Solid-State °C NMR Spectroscopy. 2—Titanium Tetrachloride-—Ketone Complexes. Structure and Mechanism of Isomerization G. MAIER, H.-O. KALINOWSKI, C. WEBER AND M. HENRICH NUMBER 5 MAY 1995 Karplus-Type Dihedral Angle Dependence for the Coupling Constants *J(!°Sn—C-C—'Sn) and 37 Sn—C —C~*Si) T. N. MITCHELL AND B. KOWALL Preparation and Steric Structure of Partially Saturated Isoindolo[1,3]- and -[3,1]benzoxazinones and -[2,4]benzoxazepinones P. SOHAR, G. STAJER, K. NAGY AND G. BERNATH Structural Investigation and Conformational Analysis of Helianthosid 2, a Saponin from Helianthus annuus L. M. HIEGEMANN, H. DUDDECK, G. BADER AND K. HILLER Theory and Application of Fully Anisotropic Overall Molecular Tumbling with Restricted Group Internal Rotation: “C NMR Relaxation Studies of Sodium Taurocholate and Ginsenoside-Re D. WANG, X. XU, N. DENG, L. PEN, W. ZHANG AND R. E. STARK Interpretation of Substituent-Induced Chemical Shifts in °C NMR Spectra of 2-Substituted Nor- bornadienes. Influence of Homoconjugation H. KRAWCZYK, H. SZATYLOWICZ AND A. GRYFF-KELLER CONTENTS OF VOLUME 33 Vii Substituent Effects on °C NMR Parameters of Chlorinated Diphenyl Ethers. A Multiple Linear Regression Analysis 355 T. NEVALAINEN, E. KOLEHMAINEN AND E. VILEN 3C and 'H NMR Studies of Nitrogen Inversion and Molecular Flexibility in the Tricyclic Anti- depressant Drug Trimipramine Maleate 367 J. C. WILSON, S. L. A. MUNRO AND D. J. CRAIK Correlation Analysis of *‘P NMR Chemical Shifts with Substituent Effects of Phenols 375 Z.-H. JIANG, D. S$. ARGYROPOLOUS AND A. GRANATA SN NMR Studies of Guanidines. I—Hydrogen Bonding and Electronic Effects in Conformationally Flexible Guanidines 383 G. R. BEDFORD, P. J. TAYLOR AND G. A. WEBB SN Studies of Guanidines. II—The Fused-in Guanidine Unit of Some Oxoheterocycles: a Combined SN NMR, °C NMR and IR Study 389 G. R. BEDFORD, P. J. TAYLOR AND G. A. WEBB EPR Study of B-Methylene Proton Magnetic Inequivalence in Monomeric Addition Radicals Derived from Mono- and 1-1’-Disubstituted Ethylenes with Chiral and Non-chiral Substituents 395 P. SMITH, W. H. DONOVAN, C. E. MADER, L. M. DOMINGUEZ AND W. T. KOSCIELNIAK Notes Neutral Hyperconjugation Challenged: No Support from One-Bond CC Coupling Constants K. KAMIENSKA-TRELA Complete 'H and °C Resonance Assignment of 27-Norurs-13-en-3f-acetlyoxy-28-oic Acid by NMR Spectroscopy M. L. JIMENO, A. RUMBERO AND P. VAZQUEZ Total Assignment of the 'H and “C NMR Chemical Shifts of Four Bufadienolides by 2D NMR Spectroscopy 412 W. F. REYNOLDS, A. MAXWELL, B. TELANG, K. BEDAISIE AND G. RAMCHARAN Papers in Press, 415 NUMBER 6 JUNE 1995 Electron Paramagnetic Resonance Spectra of Chromium(II]) in Titanium Dioxide Polymorphs: Exact Analysis and Simulation by the Isotimic Method V. BELTRAN L., L. GONZALEZ TOVANY, B. MILE AND C. C. ROWLANDS 417 Conformation of Peptide T in Aqueous Solution. Determination in Homonuclear Coupling Constants by Selective HOHAHA Techniques K. ZANGGER AND H. STERK 421 Primary and Secondary Deuterium-Induced Isotope Effects for "C NMR Parameters of Benzaldehyde P. VUJANIC, E. GACS-BAITZ, Z. MEIC, T. SUSTE AND V. SMRECKI 426 Multinuclear Magnetic Resonance Study of Aluminium(III)-Isothiocyanate Complexes in Water—Acetone Mixtures A. FRATIELLO, V. KUBO-ANDERSON, E. BOLANOS, O. CHAVEZ, J. V. ORTEGA, R. D. PERRIGAN, A. REYES AND S. M. STOLL 431 '°Te, °C, and 'H NMR Characterization of a Series of Diorganotellurium(II]) and Tetraorgano- tellurium(IV) Compounds R. W. GEDRIDGE Jr, K. T. HIGA AND R. A. NISSAN 441 Viii CONTENTS OF VOLUME 33 Use of Shaped Pulses for Semi-Selective Excitation of Imino 'H Resonances in Duplex DNA and RNA W. H. GMEINER, P. SAHASRABUDHE AND R. T. PON Ab initio Study of the "C Nuclear Shieldings for Some Polyenals and Their Schiff Bases Using LORG Theory M. WADA, M. SAKURAI, Y. INOUE, Y. TAMURA AND Y. WATANABE Si and “C NMR Spectra of tert-Butyldimethylsily! Derivatives of Amino Acids R. KUBEC, J. VELISEK, M. KViCALOVA, J. CERMAK AND J. SCHRAML Carbon-13 NMR Study of the B9(Asp) Mutant of Human Insulin: Sequence-Specific Carbon-13 Assignments and Structural Information S. M. KRISTENSEN AND J. J. LED 2-( p-Dimethylaminopheny])indan-1,3-dione-2-yl Radical: ENDOR and ESR Studies and MNDO Calculation M. V. MOTYAKIN, L. M. PISARENKO, P. SCHULER AND H. B. STEGMANN Nuclear Quadrupole Resonance and Molecular Orbital Studies of Charge Distribution in H-Bonded Complexes of 2-Chloro-4-nitrobenzoic Acid M. M. HABEEB AND M. K. AWAD Structural Elucidation of Rokitamycin, Midecamycin and Erythromycin Metabolites Formed by Pathogenic Nocardia N. MORISAKI, S. IWASAKI, K. FURIHATA, K. YAZAWA AND Y. MIKAMI "Se and C NMR Spectroscopy of Some 1,2,3-Selenadiazoles H. DUDDECK AND T. HOTOPP Determination of Signs of Coupling Constants [‘J(”Se”Si), J(’Se’C), J(’Se'H)] in 2,5-Dihydro- 1,2,5-selanasilaborole Derivatives B. WRACKMEYER, R. KOSTER AND G. SEIDEL Reference Data °C NMR Assignments of Conformationally Defined 6-s-trans-Retinoids M. F. VAEZI, W. J. BROUILLETTE AND D. D. MUCCIO NUMBER 7 JULY 1995 Carbon-13 NMR Investigation of Three Fluorinated Steroids S. CARSS, R. K. HARRIS AND R. FLETTON 'C NMR of Acyclic Sulphonated Compounds Including Some Fluorosulphonic Acids: a Chemical Shift Study J. P. CANSELIER, J. L. BOYER, V. CASTRO, G. L. GARD, J. MOHTASHAM, D. H. PEYTON AND F. E. BEHR Hyperfine Couplings of N-alkoxy-N-polynitrophenylaminy! Radicals Determined by ENDOR and TRIPLE Resonance Spectroscopy T. J. SUMI, G. STANCIUC, S. KASA AND H. JOELA Electron Paramagnetic Resonance Investigation of the Complexes of Grignard Reagents with 9,10-Phenanthrenesemiquinonate K. PAN, K. CHENG AND T. HO Characterization of New Methyl-Substituted Tetralins and Indanes by “C NMR Spectroscopy T. LAURENS, F. SCHMIT-QUILES AND D. NICOLE Ring A Conformation in Steroids. 3—Cyclosteroids and Cyclopropanosteroids K. MARAT, J. F. TEMPLETON, Y. LING, W. LIN AND R. K. GUPTA CONTENTS OF VOLUME 33 Multiple-Field Carbon-13 NMR Relaxation Investigation of Melezitose L. MALER, J. LANG, G. WIDMALM AND J. KOWALEWSKI 541 'H and °C NMR Assignment of Theaflavin, Theaflavin Monogallate and Theaflavin Digallate A. L. DAVIS, Y. CAI AND A. P. DAVIES 549 Analysis of ABX Spin Systems in Some 1,4-Dihydro-1A*,4A*-diphosphinines: Signs of *P—"C Coupling Constants and Isotope Effects 553 G. HECKMANN AND E. FLUCK Multinuclear Magnetic Resonance Study of N,N’,N’-Tris(trimethylsilyl)borazine B. WRACKMEYER, B. SCHWARZE, D. M. DURRAN AND G. A. WEBB 557 Dynamic NMR Study of the Factors Governing Nitroso Group Rotation in p-Nitrosoanilines in the Solution and Solid States D. A. FLETCHER, B. G.G OWENLOCK, K. G. ORRELL AND V. SIK 561 Semi-Selective Two-Dimensional Homonuclear and Heteronuclear NMR Experiments Recorded with Pulsed Field Gradients C. DALVIT 570 A'D H,C Correlation with Homonuclear Cross-Polarization K. ZANGGER AND H. STERK 577 Intramolecular Hydrogen Bonding and Conformation of a Dipyrrolic Derivative E. DIAZ, E. GALEAZZI, J. NAVA, J. MUCHOWSKI, A. GUZMAN, M. VAN CALSTEREN A?!D K. JANKOWSKI 581 Notes Structure Elucidation of Two Diphenylhydantoin Derivatives via 'H and “C NMR Spectroscopy M. CIECHANOWICZ-RUTKOWSKA, L. RAGONA, F. GRECO, L. ZETTA AND M. PEGNA 586 Investigation of Substituted Dihydronaphthalenes Using 'H and “C NMR Spectroscopy T. M. ALAM, M.-E. LIU, D. K. GARCIA, V. M. HERNANDEZ, R. R. MALONE, B. B. CHAMBLEE, L. M. DECK AND R. E. ROYER 592 Short Communications Hadamard Long-Range Proton—Carbon Coupling Constant Measurements with Band-Selective Proton Decoupling T. NISHIDA, G. WIDMALM AND P. SANDOR 596 Solid-State NMR Study of the Kinetics of a Ring Chain Tautomerism in a Tetrahydro-1,3-oxazine Derivative F. RIDDELL, M. ROGERSON, F. FULOP AND G. BERNATH ™* Br Effects in the High-Resolution °C NMR Spectra of Solid Bromoaromatic Compounds: Dipolar and Indirect (”*'Br, °C) Interactions Studied by ‘Inverse’ First Order Perturbation Theory S. H. ALARCON, A. C. OLIVIERI, S. A. CARSS AND R. K. HARRIS Book Review NUMBER 8 AUGUST 1995 Conformational Analysis of Oligomeric Flavanoids. 2—Methylether Acetate Derivatives of Profisetinidins J. P. STEYNBERG, E. V. BRANDT, D. FERREIRA, C. A. HELFER, W. L. MATTICE, D. GORNIK AND R. W. HEMINGWAY 611 Deuterium Isotope Effects on “C Chemical Shifts of Intramolecularly Hydrogen-Bonded Olefins 621 P. E. HANSEN, S. BOLVIG, F. DUUS, M. V. PETROVA, R. KAWECKI, R. KRAJEWSKI AND L. KOZERSKI Determination of Heteronuclear Long-Range H,X Coupling Constants from Gradient-Selected HMBC Spectra W. WILLKER AND D. LEIBFRITZ 632 X CONTENTS OF VOLUME 33 Substituent Shielding Parameters of Fluorine-19 NMR on Polyfluoroaromatic Compounds Dissolved in Dimethyl Sulfoxide-d, S. ANDO AND T. MATSUURA The 'H and “C NMR Spectra of the Methanolic Allomerization Products of 137(R)-Chlorophyll a K. HYVARINEN, J. HELAJA, P. KURONEN, I. KILPELAINEN AND P. H. HYNNINEN Complete Assignment of the Aliphatic Chains in Dimers, Trimers and Polymer of 3-Hexylthiophene through 2D NMR Spectroscopy M. FERRARI, A. MUCCI, L. SCHENETTI AND L. MALMUSI Magnetization Transfer NMR Study of Nitrogen Inversion in 2,2-Dimethylaziridine E. R. JOHNSTON Oxygen-17 and Carbon-13 NMR Studies of Diarylketenes G. CERIONI, A. PLUMITALLO, J. FREY AND Z. RAPPOPORT Nitrogen NMR Assessment of Interactions Between Nitroso, Cyano, and Acetyl Groups Across Aliphatic Systems M. WITANOWSKI, Z. BIEDRZYCKA, L. KONOPSKI AND K. GRELA Electron Spin Resonance Studies of the Anions of Some Azulene Derivatives: 1-tert-Butyl-, 1-3-di- tert-Butyl- and 4,6,8-Trimethylazulene R. J. WALTMAN AND J. BARGON NMR of Terminal Oxygen. 16—"O NMR of Amide-Analogous N-Acyl derivatives of Non-Basic Nitrogen Groups: The Question of Amide Resonance H. DAHN, V. VAN TOAN AND P. PECHY 8C and “N NMR Study of Substituted 1,2,4-Triazines E. KOLEHMAINEN, D. SAMAN, A. PISKALA AND } {. MASOJIDKOVA 'H (300 MHz) and °C NMR Spectral Assignments for Diisocyanoadociane G. M. KONIG AND A. D. WRIGHT Book Reviews, 698; Papers in Press, 700 NUMBER 9 SEPTEMBER 1995 Ab initio “C Nuclear Shielding Calculations for Some Solid Amino Acids using the GIAO Procedure Y. HE, D. WU, L. SHEN, B. LI AND G. A. WEBB Distinguishing Two-Bond and Three-Bond “C—'H Connectivities by 2D BIRD-Decoupled Difference Spectra: the DODO Pulse W. F. REYNOLDS, J.-P. YANG AND R. G. ENRIQUEZ Investigation of Structural Inhomogeneities in Soft-Block Modified Methacrylate Resins N. J. CLAYDEN AND G. SMYTH One- and Two-Dimensional NMR Study of Resol Phenol-Formaldehyde Prepolymer Resins T. H. FISHER, P. CHAO, C. G. UPTON AND A. J. DAY 1-Alkynyldioxaborolanes: Determination of 'J(°C,"B) from “C NMR Studies at 102°C B. V. CHEESMAN, L. DELOUX AND M. SREBNIK “Ni NMR Spectroscopy of Di- and Tricarbonylnickel Complexes K. D. BEHRINGER AND J. BLUMEL Measurement of Indirect Spin—Spin Coupling Constants Between Crystallographically Equivalent Nuclei. Determination of *J('P,"P) in Solid Ag[P(m-tolyl),],NO, G. WU, R. E. WASYLISHEN, H. PAN, C. W. LIU, J. P. FACKLER, JR. AND M. SHANG Dynamic NMR: A New Procedure for the Estimation of Mixing Times in the 2D EXSY Experiments. A Four-Site Exchange System Studied by 1D and 2D EXSY Spectroscopy V. S. DIMITROV AND N. G. VASSILEV CONTENTS OF VOLUME 33 Notes Isomeric Equilibria of 1-Methylamino-2-nitroethene L. KOZERSKI, P. KRAJEWSKI AND E. BEDNAREK NMR Assignments and Absolute Configuration of Kauranoids R. X. TAN, W. Z. WANG, S. X. WU AND L. YANG Reference Data 'H and °C NMR Study of Stereoisomers of 3-(Arylpropenylidene)isobenzofuran-i(3H)-ones N. N. SVESHNIKOV AND V. I. NIKULIN Carbon and Proton NMR Assignments for 6,7-Dimethoxycoumarin M. G. REINECKE, D. E. MINTER AND Q. JIA Book Review, 759; Papers in Press, 760 NUMBER 10 OCTOBER 1995 The Townes and Dailey Approach to the Interpretation of NQR Parameters in the Light of Non- Empirical Calculations. Three-Membered Rings M. Yu. BALAKINA, O. D. FOMINYKH, I. D.M OROZOVA AND D. Ya. OSOKIN Submicromole Structure Elucidation: Cryptolepicarboline—a Novel Dimeric Alkaloid from Cryptolepis Sanguinolenta M. H. M. SHARAF, P. L. SCHIFF, JR, A. N. TACKIE, C. H. PHOEBE, JR, L. HOWARD, C. MEYERS, C. E. HADDEN, S. K. WRENN, A. O. DAVIS, C. W. ANDREWS, D. MINICK, R. L. JOHNSON, J. P. SHOCKCOR, R. C. CROUCH AND G. E. MARTIN 1H and 3C NMR Study of Substituent Effects in 2- and 3-Substituted Diphenyl Sulphides and Sulphones and 4-Substituted 2’,6'-Dimethyldipheny! Sulphides S. PERUMAL, R. CHANDRASEKARAN, V. VIJAYABASKAR AND D. A. WILSON Solid-State Lead-207 NMR of Lead(II) Nitrate: Localized Heating Effects at High Magic Angle Spinning Speeds L. C. M. VAN GORKOM, J. M. HOOK, M. B. LOGAN, J. V. HANNA AND R. E. WASYLISHEN NMR Soivent Effect Study of Pyrroline-N-oxide Spin Traps: Microenvironments in Sodium Dodecyl Sulfate Micelles D. L. HAIRE, E. G. JANZEN, V. J. ROBINSON AND Y.-K. ZHANG Computerized Analysis of 2D INADEQUATE Spectra to Assign Chemical Shifts in Aromatic Compounds A. M. ORENDT, R. DUNKEL, W. J. HORTON, R. J. PUGMIRE AND D. M. GRANT 2,5-Dihydro-1,2,5-azasilaborole Derivatives, Studied by '5N and 29Si NMR Using Hahn-Echo and Pseudo-BIRD Experiments B. WRACKMEYER, E. KUPCE, R. KOSTER AND G. SEIDEL The !5N-Isotopomers of cis- and trans-Difluorodiazine; a °F NMR Investigation of the Two [AX], spin systems of 5N,F, F. AUBKE, G. HAGELE AND H. WILLNER Substituent-Effect Additivity in 1-X-, 2-X- and 1, 2-Di-X-9,10-anthraquinone Series, a Tool for 5C NMR Chemical Shift Assignment K. DANIELSEN Highly Selective 1D CH Correlations J. STELTEN AND D. LEIBFRITZ Determination of the Molecular Structure of s-Trioxane by NMR of Partially Oriented Molecules A. L. ESTEBAN AND M. P. GALACHE NMR Studies on the Rhodium(I) Chelates of Two 2,3-Bis(O-diphenylphosphino)-f-D-glucopyrano- sides: Potent Catalysts for Enantioselective Reactions M. MICHALIK, T. FREIER, M. SCHWARZE AND R. SELKE CONTENTS OF VOLUME 33 NUMBER 11 NOVEMBER 1995 33§ NMR Spectroscopy: Substitutent y-Effect. Halogen Derivatives of Tetrahydrothiophene 1,1- Dioxide ' A. B. ROZHENKO, V. M. BZHEZOVSKY, V. V. POLOVINKO AND A. G. MAKARENKO Separation and Characterization of Components of Peptide Libraries Using On-flow Coupled HPLC-NMR Spectroscopy J. C. LINDON, R. D. FARRANT, P. N. SANDERSON, P. M. DOYLE, S. L. GOUGH, M. SPRAUL, M. HOFMANN AND J. K. NICHOLSON Structural Assignment of the Intramolecular meta Photocycloadduct Isomers from 4-Phenoxybut-1- enes and 3-Benzyloxyprop-l-enes by Proton NMR Spectroscopy D. C. BLAKEMORE, A. GILBERT, A. DE BRUYN, D. DE KEUKELEIRE AND E. VAN DER EYCKEN Rapid Method for Combined X-{'H} NOE and 7, Measurement Using Heteronuclear Polarization Transfer K. E. KOVER, P. FORGO AND G. BATTA 170 NMR Studies of Diary! a-Diketones. The Case of 2,2°,4,4°,6,6°-Hexa-tert-butylbenzil G. CERIONI, A. PLUMITALLO, J. FREY AND Z. RAPPOPORT Long-Range 3’C1/55Cl and ®'!Br/Br Isotope Shifts in the °F NMR Spectra of Some Substituted Fluorobenzenes G. M. BERNARD AND R. W. SCHURKO Analysis of '5C NMR Substituent Chemical Shifts in Some (Aryl)(2-nitrobenzo[b]thiophen-3-y])- amines: a New Class of Compounds with Analgesic, Anti-exudative and Anti-inflammatory Activities Showing Low Mutagenicity L. LAMARTINA, D. SPINELLI, F. GUERRERA AND M. C. SARVA Pure Absorption Phase Gradient-Enhanced HMQC-TOCSY with Direct Response Editing R. C. CROUCH, A. O. DAVIS AND G. E. MARTIN Solid State NMR Investigations of Dicalcium Phosphates K. SCHAUMBURG, E. SHABANOVA AND P. EICHNER Notes NMR Assignments and Absolute Stereochemistry of Two Guaianolide Sesquiterpenes From Tanacetum densum Subsp. amani A. ULUBELEN, N. GOREN, T.-Y. JIANG, L. SCOTT, M. TTANASOA-RAMOMONJY AND J. K. SNYDER NUMBER 12 DECEMBER 1995 Review NMR Spectroscopy of Steroidal Sapogenins and Steroidal Saponins: An Update P. K. AGRAWAL, D. C. JAIN AND A. K. PATHAK Novel NMR Aspects of Tertiary Phosphine Complexes of Ru(II) Etioporphyrin I S. LICOCCIA, M. PACI AND R. PAOLESSE Solution Structures of the DP IV (CD26) Inhibitor Val-boroPro Determined by NMR Spectroscopy U. L. GUNTHER, J. L. SUDMEIER, S. J. COUTTS, R. J. SNOW, R. W. BARTON AND W. W. BACHOVCHIN Note 31P NMR—Structure Correlations for Phosphonocarboxylic Acids and Esters S. OLAGNON-BOURGEOT, F. CHASTRETTE AND D. WILHELM