Table 1. Synthetic conditions and resulting molecular weights of 1.

Catalyst (stoichiometry)*	Reaction Temp§ (°C)	Mn (g mol−1)†	Mw (g mol−1)†
Pd(Ph3P)4 (4 mol % eq.)	120	29,000 (320,000)‡	91,000 (840,000)‡
Pd2(dbda)3 / P(tolyl)3 (2/8 mol % eq.)	120	71,000	344,000
Pd2(dbda)3 / P(tolyl)3 (2/8 mol % eq.)	130	110,000	501,000

^*Catalyst stoichiometry against monomers.

^§Reaction conducted in chlorobenzene.

^†Molecular weight numbers obtained using high-temperature GPC at 160 °C with 1,2,4-trichlorobenzene as eluent.

^‡Molecular weight numbers obtained using room-temperature GPC with THF as eluent.