Chemistry Letters, Vol.33, No.12, 1570-1571, 2004
Preparation and properties of 1,2-bis[(2,4,6-tri-t-butylphenyl)phosphinidene]cyclobuta[l]phenanthrene
Sterically protected 1,2-bis[(2,4,6-tri-t-butylphenyl)-phosphinidene]cyclobuta[l]phenanthrene (4) and its group(6) and group(10) transition metal complexes were prepared. X-ray crystallographic analysis of 4 revealed a planar structure of the diphosphinidenecyclobuta[l]phenanthrene moiety.