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issue	21
is Is Part Of of	Chemical evolution of a nitrogenase model. IX. Effects of adenosine 5'-triphosphate and of acids in the model system and the adenosine 5'-triphosphate requirement of nitrogenase Chemical pseudoexcitation and paradoxical orbital interaction effect Nonlinearity in buffer-rate relations. Significance of carboxylate-acid complexes Revised structure for the antibiotic pillaromycin A Diene isomerization in a Diels-Alder reaction. Synthesis of 8-epi-dendrobine Structure of a crystalline derivative of saxitoxin. Structure of saxitoxin Uracil and its interaction wth silver ion in aqueous alkaline media Acetyl transfer reaction in catechol acetate malonate. Model for the biosynthesis of polyketides and fatty acids Sulfuranes. XVII. Reactions of secondary amides with a diaryldialkoxysulfurane. Selective method for the rapid cleavage of secondary amides Steric effects. IV. E1 and E2 eliminations Book Reviews Kinetic applications of electron paramagnetic resonance spectroscopy. XX. 2,4,6-Tri(tert-butyl)benzyl, -anilino, -phenoxy, and -phenylthiyl radicals Absolute configuration of vincoside Simulated ab initio molecular orbital technique. II. Benzenoid aromatic hydrocarbons Electronic structure of compounds containing metal-metal bonds. Decacarbonyldimetal and related complexes Silver(1+) ion catalyzed rearrangements. XXXII. Unsaturated heterocyclic systems. XCIII. Probing of the interrelation between heteroatomic substitution and equilibrium imbalance in 2,8-trimethylenesemibullvalene derivatives Crystal and molecular structure of the unusual spiro dihydrofuran diterpene nepetaefolin Acid dissociation of chloroform and phenylacetylene. Solvent isotope effects Synthesis of stable homopolyatomic anions of antimony, bismuth, tin, and lead. Crystal structure of a salt containing the heptaantimonide(3-) anion Optical rotatory dispersion and vacuum ultraviolet circular dichroism of a polysaccharide. .iota.-Carrageenan Singly hydrogen-bridged borane anions derived from the hydroboration products of 1,3-butadiene. X-ray structure determination of tetrabutylammonium .mu.-hydro-1,2-dihydro-1,2:1,2-bis(tetramethylene)diborate General methods of synthetic analysis. Strategic bond disconnections for bridged polycyclic structures Acid catalyzed isomerization and thermal rearrangement of nickel homoporphyrins CIDNP in reactions initiated by tetramethyl-1,2-dioxetane Novel polar photochemical additions of acetic acid to phenylallenes Asymmetric titanium(IV) metal. First example of a resolved titanocene derivative Organic transition states. IV. Concerted elimination of hydrogen chloride from ethyl chloride X-ray photoelectron spectroscopic study of cobalt(II) Schiff base complexes and their oxygenation products Isoinductive resonance substituents for mechanism studies. I. Application to the norbornyl tosylate solvolysis problem Rearrangements of azidoquinones. XVI. Thermal and photolytic rearrangements of 2,5-diazido-1,4-quinones. Synthesis and chemistry of cyanoketenes Halogenated octahydroborate salts. New route to pentaborane(9) Molecular beam chemistry. Reactions exchanging van der Waals bonds among three or more halogen molecules Nature of mixed micelles from anionic dyes and cationic surfactants. Kinetic study Luminescence of heterobischelated complexes of iridium(III). I. Resolution of the multiple emissions of cis-dichloro-1,10-phenanthroline-5,6-dimethyl-1,10-phenanthrolineiridium(III) chloride Chemistry of singlet oxygen. XXI. Kinetics of bilirubin photooxygenation Electronegative groups at C-3 of rifamycin S enhance its activity toward DNA-dependent RNA polymerase Conformation of the tetrasaccharide stachyose Carbon-13 magnetic resonance study of structural and dynamical features in carbamylated insulins Rearrangements of toluene and cycloheptatriene cations Masthead Free radicals in an adamantane matrix. XI. Electron paramagnetic resonance study of conformations in the .beta.-halo-tert-butyl radicals Alkylation of benzene with isoparaffin-alkyl chloride mixtures Rearrangement of N-substituted porphyrins. Preparation and structure of homoporphyrins Syntheses of supposed and real pillarose Rotational microviscosity factor from intramolecular dipole-dipole contribution and deuteron relaxation time Effect of reacting and competing counterions on the hydrolysis kinetics of an anionic dye ester in mixed micelles with CTAB [hexadecyltrimethylammonium bromide] Carbon-13 nuclear magnetic resonance spectral analysis of tetracycline hydrochloride and related antibiotics Simple total synthesis of prostaglandins from 4-cumyloxy-2-cyclopentenone Generation and trapping of butalene N-Protonation route in the acid-catalyzed hydrolysis of amides Preferential labilization and stereochemical change in the photolysis of trans-diacidotetraamminechromium(III) ions Electroorganic chemistry. XXI. Selective formation of .alpha.-acetoxy ketones and general synthesis of 2,3-disubstituted 2-cyclopentenones through the anodic oxidation of enol acetates Rearrangements of azidoquinones. XV. Thermal rearrangement of 2,3-diazido-1,4-quinones to 2-aza-3-cyano-1,4-quinones Orientation of some nitroxide spin labels in the lamellar mesophases of Aerosol-OT-water and decanol-decanoate-water systems Mechanism of the complexation of phenylboronic acid with oxalic acid. Reaction which requires ligand donor atom protonation Effects of concentration of amine and of medium in photoreduction of ketones by amines Ligand-based redox reactions. Analysis of the electron paramagnetic resonance spectrum of the [Ni(Me4[14]hexaenatoN4)]+ cation radical, the central member of a three-membered electron transfer series containing a tetraaza[14]annulene ligand system Bonding studies in Group 4 substituted anilines. VI. Assignment of coupling constants and CNDO/2 description of the radical anions of o-, m-, and p-trimethylsilyl-N,N-dimethylaniline Evidence for carbocation-arenesulfonate ion pairs in reactions with hydroxide and borohydride ion Importance of nonbonded attraction in 2-butene Ethylene formation in carbon atom reactions. Mechanism and isotope effects Satellite bands and the valence ionic states of ozone Relative stabilities of dications in strong acids. Calorimetric study of dications formed from diesters, diketones, and diacid chlorides Barriers to internal rotation in 1,3,5-trineopentylbenzenes. VII. Evidence for attractive steric effects Role of cage return in the determination of the solution phase deuterium isotope effect during hydrogen abstraction reactions of bromine atoms Determination of the solution conformation of rifamycin S and derivatives by nuclear magnetic resonance Structure of crystalline (hexatriene dianion)dilithium, an ion-paired Z,Z-dianion Aromatic radical anions in neat solvents. Crown complex ion-pair formation Immobilized radicals. I. Principal electron spin resonance parameters of the benzosemiquinone radical Rhodium(I) catalysis in olefin photoreactions Vitamin D-3,5-cyclovitamin D rearrangement Mechanism of photolytic conversion of 2-azidobiphenyl to carbazole Carbon-13 nuclear magnetic resonance analysis of the metal binding site in tetracycline Structure of compounds containing linear and tetrahedral silicon-mercury bonds, a uniquely caged lithium ion Evidence for a remote secondary deuterium kinetic isotope effect arising from a sterically congested ground state Can a square or effectively square singlet be the ground state of cyclobutadiene Kinetics of the reduction of Rhus vernicifera laccase by ferrocyanide ion Reexamination of the secondary .alpha.-deuterium isotope effect in thermolysis of 1,1'-diphenylazoethane. Mechanistic consequences for related compounds Photochemistry of thiatriazoles. Benzonitrile sulfide as intermediate in the photolysis of phenyl-substituted 1,2,3,4-thiatriazole, 1,3,2-oxathiazolylio-5-oxide, and 1,3,4-oxathiazol-2-one Oxazolines. XIX. Asymmetric synthesis of 3-substituted alkanoic acids via conjugated addition of organolithium reagents to chiral oxazolines Bis(trimethylphosphoranylidene)methane, (CH3)3PCP(CH3)3

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