Synthesis of organometallic polymers containing cobaltacyclopentadiene moieties in the main chain. Synthesis of organocobalt polymers from various diynes

Macromolecules

Volumn 30, Issue 18, 1997, Pages 5205-5212

  Lee, Jong Chan ^a   Nishio, Akinori ^a   Tomita, Ikuyoshi ^a   Endo, Takeshi ^a  

^a TOKYO INSTITUTE OF TECHNOLOGY   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

CHEMICAL BONDS; COBALT COMPOUNDS; MOLECULAR STRUCTURE; SYNTHESIS (CHEMICAL);

COBALTCYCLOPENTADIENE; DIYNES;

METALLORGANIC POLYMERS;

EID: 0031559767     PISSN: 00249297     EISSN: None     Source Type: Journal    
DOI: 10.1021/ma961739p     Document Type: Article

References (20)

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12. Independently, Nishihara et al. and Tilley et al. also reported the synthesis of similar types of organometallic polymers, (a) Ohkubo, A.; Aramaki, K.; Nishihara, H. Chem. Lett. 1993, 271. (b) Mao, S. S. H.; Tilley, T. D. J. Am. Chem. Soc. 1995, 117, 5365.
13. Independently, Nishihara et al. and Tilley et al. also reported the synthesis of similar types of organometallic polymers, (a) Ohkubo, A.; Aramaki, K.; Nishihara, H. Chem. Lett. 1993, 271. (b) Mao, S. S. H.; Tilley, T. D. J. Am. Chem. Soc. 1995, 117, 5365.
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18. 13C-NMR technique was used for the estimation.
19. n) of the soluble part is 8400. The polymerization of 2Ea might proceed quantitatively because no diyne monomer remained in the reaction mixture. The lower solubility of the obtained polymer 3Ea might be due to the higher regioregularity of the polymer, and the fraction with higher molecular weight might be less soluble than the fraction with lower molecular weight. (11) The formation of 2,5-di-n-octyl-3,4-diphenylcobaltacyclopentadiene unit can be denied because the product bearing sterically more hindered phenyl substituents at both the 3-and 4-positions is the isomer most dificult to produce. This is also supported by the result on the model experiment.
20. Wakatsuki, Y.; Yamazaki, H. J. Organomet. Chem. 1977, 139, 169.