(1 9.59). afforded mainly cyclononanone. A smaller amount of cyclononanol and cis- cyclononene was also obtained. These results suggest that the principal organoborane, tris- 1-cyclononenylborane, is that formed from attack of boron at the central carbon atom of the allene linkage. It is the organoborane which would be formed by hydroboration of cyclononyne.'The formation of cyclononene is best interpreted as evidence for the ...
