NorbomyI Cation

NorbomyI cations, besides displaying the 1,2 shifts of a CH2 group previously illustrated for the isobomeol — camphene conversion, are also prone to rapid hydride shifts from the 3 to the 2 position (known as 3,2 shifts). These 3,2 shifts usually take place from the exo... 

In 1970, Olah reported that he had prepared a stable norbomyl cation in SbF5r4S02. From its pmr, cmr, and Raman spectra, he concluded that it has, inde, the nonclassical structure with delocalization of a electrons. The 2-phenyl-norbomyi cation, on the other hand, has the classical structure this l nzylic... 

There is an excellent ratio of the chemical shifts of the cation centres and those for the model classical ions 1-aryl-l-cyclopentyl (r — 0.988) which conforms the classical nature of the 7-aryl-7-norbomyI ions. 

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