## Ε½ . Several organometallic compounds were examined as second catalyst components cocatalysts of the MoOCl -cocata-4 ## Ε½ . lyst -EtOH system with the motivation of development of novel catalysts for the living polymerization of substituted acetylenes. Catalyst systems such as MoOCl -Et Zn-Et
On the role of catalyst components in the living metathesis polymerization of substituted acetylenes by MoOCl4-based systems
β Scribed by Shigetaka Hayano; Toshio Masuda; Hoyning Ji; Rigoberto C. Advincula
- Publisher
- Springer
- Year
- 2000
- Tongue
- English
- Weight
- 180 KB
- Volume
- 44
- Category
- Article
- ISSN
- 0170-0839
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π SIMILAR VOLUMES
Polymerization of phenylacetylenes (PAS) having various ortho-substituents were examined by using MoOCI,-n-Bu,Sn-EtOH (mole ratio 1 : 1 : 1) as catalyst. Phenylacetylenes with no or sterically small ortho-substituents did not polymerize in a living fashion. On the other hand, in the polymerization o
The polymerization of aliphatic disubstituted acetylenes was examined with MoOCl 4 -n-Bu 4 Sn-EtOH (1/1/2) ternary catalyst in anisole at 0 Β°C. Various linear aliphatic disubstituted acetylenes such as 2-nonyne provided polymers with narrow molecular weight distributions (weight-average molecular we
## Abstract The polymerization of phenylacetylene initiated by MoCl~5~ and WCl~6~ based initiators was monitored directly in the NMR sample tube and demonstrated the presence of backbiting and intramolecular cyclization reactions. It was shown that the ratio of cis to trans structural units obtaine
Organometallic nickel complexes with bidentate P"0 chelating ligands of ylidic (-C(O)H=PPh,) and phosphino-acetic (-CH( PPh,)-COOH) type heterogenized on polystyrene resins by anchoring through the carbon atom of the ligand have been prepared and used in the polymerization and/or oligomerization of