On April 26, 2007, Chung, Young-Keun; Jung, Il-Gu; Chun, Sung-Ho; Park, Young-Whan; Choi, Dai-Seung; Yoon, Sung-Cheol; Lim, Taesun; Lee, Jungmin published a patent.Reference of 1H-Imidazolium, 1,3-bis[4-iodo-2,6-bis(1-methylethyl)phenyl]-, chloride (1:1) The title of the patent was Production of cyclic olefin polymer using a metal complex catalyst having an N-heterocyclic carbene ligand. And the patent contained the following:
The polymer is produced by addition polymerization of a cyclic olefin monomer in the presence of a metal complex catalyst represented by [M(L1)x(L2)y(L3)z]a[Ani]b, wherein M=a Group X metal; [M(L1)x(L2)y(L3)z]=a cationic complex; L1=an anionic hydrocarbyl-containing ligand; L2=a neutral ligand; L3=an N-heterocyclic carbene ligand; [Ani]=an anion capable of weakly coordinating with the metal M; x=1 or 2; y=0-4; z=1 or 2; 2鈮+y+z鈮?; a, b=number of 1-10 which is used to satisfy the net charge balance of the metal catalyst complex. Thus, 5.6 g 4-bromo-2,6-dimethyl aniline and 1.58 mL 40% glyoxal were reacted for 48 h to give 4.1 g N,N’-bis(4-bromo-2,6-dimethylphenyl)-1,2-ethanediimine, , 3 g of which was reacted with 0.22 g para-formaldehyde in the presence of 4M HCl to give 1.8 g gray powder, 1.5 g of which was added with 0.39 g potassium tert-butoxide, stirred for 4 h, to give 0.9 g carbene compound (A). Carbene compound A (0.9 g) and 0.38 g palladium allyl chloride were reacted in THF for 1 h to give 1.2 g palladium complex, which was combined with silver tetrafluoroborate to polymerize norbornene at 80掳 for 24 h to give a norbornene homopolymer with 99% yield. The experimental process involved the reaction of 1H-Imidazolium, 1,3-bis[4-iodo-2,6-bis(1-methylethyl)phenyl]-, chloride (1:1)(cas: 934008-48-7).Reference of 1H-Imidazolium, 1,3-bis[4-iodo-2,6-bis(1-methylethyl)phenyl]-, chloride (1:1)
The Article related to norbornene palladium heterocyclic carbene polymerization catalyst, Chemistry of Synthetic High Polymers: Polymerization Kinetics, Mechanisms, Thermodynamics, Catalysis, Catalysts and other aspects.Reference of 1H-Imidazolium, 1,3-bis[4-iodo-2,6-bis(1-methylethyl)phenyl]-, chloride (1:1)
Referemce:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com