New Organometallic Derivatives of 1,6-Methano[10]annulene

Abstract

The reverse addition of 2-lithio-1,6-methanol[10]annulene (2-lithio-1,6-methanocyclodecapentaene) to some group VI metal crabony compounds followed by alkylation with meerwein salts gave the E. O. Fischer transition metal complexes in good to excellent yields. Cyclization of the chromium complex with diphenylacetylene is achieved in moderate yield