TY - RPRT TI - Metallocene polymerization catalyst ion-pair aggregation by cryoscopy and pulsed field gradient spin-echo NMR diffusion measurements. AU - Nicholas G Stahl AU - Cristiano Zuccaccia AU - Tryg R Jensen AU - Tobin J Marks PY - 2003 DO - 10.1021/ja0346375 UR - https://pubmed.ncbi.nlm.nih.gov/12720420/ ID - 12720420 ER -