345226-35-9Relevant academic research and scientific papers
Transition metal acetylide catalysts for polymerization of alkynes 1. Effect of ligands on catalytic activity of nickel complexes
Zhan, Xiaowei,Yang, Mujie
, p. 27 - 31 (2001)
The catalytic activity of a series of nickel acetylides and chlorides containing different phosphine and alkynyl ligands: NiL2(C≡CR)2; NiL2(C≡CR)Cl and NiL2Cl2 (L2 = (PPh3)2, (PBu3)2 and Ph2PCH2CH2PPh2; R = p-C6H4C≡CH, C6H5, H, CH2OH and CH2OCOCH3), towards p-diethynylbenzene polymerization is compared. The catalytic property of these acetylides is related to chlorine, phosphines and alkynyl ligands bonded to the metal atoms. The polarity, steric hindrance and electron-donating ability of ligands are main factors influencing the catalytic activity of these complexes. Nickel acetylides were found to be novel efficient initiating systems for the alkyne polymerization. The polymerization proceeds under mild conditions to give soluble π-conjugated polymers with weight average molecular weights as high as 4.8 × 104 in yields as high as 95%.
