Abstract Heptafluoro-2-naphthyl-lithium decomposes to give hexafluoro-1, 2-naphthalyne and not the 2, 3-compound. This was demonstrated by capture of the aryne with furan and with heptafluoro-2-naphthyl-lithium; in this last reaction the ratio of attack at the 2-position of the naphthalyne to that at the 1 was 9: 2.
