Reference

Nickel-ylide complexes useful as catalysts in the polymerization of olefins

Nickel-ylide complexes useful as catalysts in the polymerization of olefins.Some chemicals with cas registry numbers like 89743-13-5 and 859-65-4 are also used. Ostoja Starzewski, Aleksander K.; Witte, Josef (Bayer A.-G. , Fed. Rep. Ger.). Ger. Offen. DE 3228865 A1 9 Feb 1984, 27 pp. (German). (Germany). CODEN: GWXXBX. CLASS: IC: C07F015-04; C08F010-00; C08F004-26. APPLICATION: DE 82-3228865 3 Aug 1982. DOCUMENT TYPE: Patent CA Section: 35 (Chemistry of Synthetic High Polymers) Section cross-reference(s): 29, 49 The Ni ylides I (R1-R6 = (substituted) hydrocarbyl; R7, R8 = H, (substituted) hydrocarbyl; X, Y = H, hydrocarbyl, silyl, halogen, CN] are catalysts for polymg. olefins, which can be prepd. in good yield and purity and with high stability. Thus, stirring 50 mmol bis(cyclooctadiene)nickel [1295-35-8] with 1 equiv. each BzCH:PPh3 [859-65-4] and CH2:PMe3 [14580-91-7] in 200 mL PhMe at 40-60° for 2 hgave ~80% I (R1-R3 = Me; R4-R6, R8 = Ph; R7, X, Y = H) (II) [89743-10-2]. Stirring 2 mmol II in 250 mL PhMe and 32 L cyclohexane with C2H4 at 90°/10 bar for 1-2 h gave 1174 g (20964 mol C2H4/mol II, 11% oligomers) polyethylene [9002-88-4] with m.p. ~118° and limiting viscosity (Tetralin, 120°) 0.11 dL/g. .

Ligand property and concentration distributions in the system 3-methylbut-1-yn-3-ol/Ni(COD)2/P-ligands

Ligand property and concentration distributions in the system 3-methylbut-1-yn-3-ol/Ni(COD)2/P-ligands. Hartmann, W.; Preuss, K. D.; Singer, H. (Fachbereich Chem., Univ. Mainz, Mainz D 6500, Fed. Rep. Ger.). J. Organomet. Chem., 258(2), 235-46 (German) 1983. CODEN: JORCAI. ISSN: 0022-328X. DOCUMENT TYPE: Journal CA Section: 35 (Chemistry of Synthetic High Polymers) Section cross-reference(s): 29, 67 The P-Ni ratio for 18 P ligands was varied over several orders of magnitude and the effect upon the oligomerization of 3-methylbut-1-yn-3-ol [115-19-5] with bis(1,5-cyclooctadiene)nickel [Ni(COD)2 [1295-35-8] as catalyst was examd. Some conclusions could be drawn concerning assocn.There are some commonly used reagents with their cas registry numbers 2622-14-2 and 6002-34-2 in this article. phenomena. The resulting changes in product compn. were correlated with steric and electronic characteristics of the ligands. Steric control dominated and contributed ca. 70% of the obsd. effects. .