Photochemistry of tetraarylborate salts (Ar4B-): formation of 2,5,7,7-tetraphenyl-7-boratabicyclo[4.1.0]hepta-2,4-diene (a boratanorcaradiene) by irradiation of (p-biphenylyl)triphenyl borate
作者:John D. Wilkey、Gary B. Schuster
DOI:10.1021/ja00006a037
日期:1991.3
a process analogous to the di-π-methanerearrangement of hydrocarbons. One of the boratanorcaradienes, tetramethylammonium 2,5,7,7-tetraphenyl-7-boratabicyclo[4.1.0]hepta-2,4-diene (1), was isolated as a deep red crystalline solid, and its structure was determined by X-ray crystallography. Borate 1 is a fluxional compound at room temperature; an electrocyclic rearrangement exchanges the two boron-bound