Peter L. Rinaldi

The determination of absolute configuration using nuclear magnetic resonance techniques

Revue des techniques de determination des configurations absolue par des methodes RMN depuis 1981 et presentation des resultats obtenus pour differents groupes de fonctions: alcools, amines, aminoacides, hydroxyacides, esters, amides, etc...

13C-NMR studies of thermally isomerized polyphenylacetylenes prepared with MoCl5 and WCl6 catalysts

Summary13C-NMR studies of thermally treated polyphenylacetylenes (PPA) prepared with MoCl5 and WCl6 catalysts provide evidence for intramolecular cyclization and chain scission of both cis and trans polymers. The microstructures of thermally treated cis and trans PPA are different from the microstructure of trans PPA obtained by thermal isomerization during propagation.

Comb-like polymers and graft copolymers from macromers

SummaryA poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) macromer containing styrene (PPO-St) as a polymerizable group was prepared from a PPO containing phenol and p-bromophenoxy groups as the two chain ends. The main reaction consists of the quantitative etherification of the phenol chain end with chloromethylstyrene in the presence of tetrabutylammonium hydrogen sulfate as a phase transfer catalyst. Preliminary data on radical polymerization of PPO-St demonstrates that under suitable polymerization conditions comb-like PPO can be obtained with 46% yield and polymerization degree of about 34.

Selective excitation and sensitivity enhancement of 1H resonances by polarization transfer from low gamma quadrupolar nuclei

Separation de la sequence INEPT en transfert de polarisation et temps de reconcentration qui sont independamment ajustes et bases sur un spin I des spins reservoir et observe respectivement

Application of 2D 6Li{1H} heteronuclear overhauser enhancement spectroscopy, energy minimization, and distance constraints to the study of lithium ion complexes with lasalocid A

We describe a methodology for studying metal ion complexes with larger molecules using a combination of 1D and 2D NMR techniques and molecular modeling

Functional Polymers and Sequential Copolymers by Phase Transfer Catalysis 4. A New and Convenient Synthesis of p- and m-Hydroxymethylphenylacetylene

Summaryp- And m-hydroxymethylphenylacetylenes were prepared by a two step sequence starting from a commercial mixture of p- and m-chloromethylstyrene, i.e., by the bromination of the vinylic monomer mixture followed by separation of m- and p- brominated derivatives by fractional crystallization, and simultaneous dehydrobromination and nucleophilic substitution of the -Cl with -OH.