Norbomene 856 INDEX

CONTENTS Preface, Brian Hatton. Applications of Ring Strain in Natural Product Synthesis, James D. White and Nadine Chauyi Lee. Uses of the Vacuum Gas-Solid Reaction Procedure in Synthesis, W. E. Billups and Benny E. Amey, Jr. Polysubstituted Cubanes Towards Complete Systematic Substitution of the Cubane Nucleus, John Tsanaktsidis. A Personal Perspective on Norbomenes, Cyclobutenes, and Other Ring-Strained Dienophiles in Organic Synthesis, Ron N. Warrener. Synthetic Studies Related to Fullerenes and Fullerene Fragments, Goverdhan Mehta and H. Surya Prakash Rao. Index. 

Goodall [7] polymerized norbomene using the cationic chromium-palladium/ boron pair complex, (IV) to aM of roughly 1,200,000 daltons with a PDI index of 1.2. 

In Table 1 the experimental data (weight average of molar mass, polydispersity index, decomposition temperature and heat of decompositioiO of polymers with varius add groups — OR (see equ.l) and different stereochemistry are listed. It can be seen, that the decomposition temperature decreases from ca. 390 °C for poly(emfo,endo-2,3-diacetoxy-5-norbomene), polymer 1 b, down to ca. 270 C for poly(e >,exo 5-norbomene-23-bis(methylcarbonate)), pofymer 3 a. As erqpected, the polymers from the exo,eco-isomers decomposed at lower temperatures as the endo,endo- sova.cK because the thermal elimination reaction is a typical syn-elimination ... 

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