Ma. Beswick et al., SOLVENT DIRECTED AGGREGATION OF A METALLOCENE - STRUCTURES OF ([PB(ETA-C5H5)(2)](3).C(6)H(5)ME)(INFINITY) AND [PB(ETA-C5H5)(2)](6), Chemical communications, (1), 1997, pp. 109-110
The classic zigzagged chain structure of orthorhombic plumbocene, [Pb(
eta-C5H5)(2]infinity), is Obtained by crystal growth from the vapour p
hase; however, crystallisation from toluene results in modification of
the conformation of the polymer chain, as observed in the solvate [Pb
(eta-C5H5). C(6)H(5)Me](infinity) 1, and cyclisation into hexamers, as
seen in the new hexagonal phase [Pb(eta C5H5)(2)](6) 2.