ROMP of norbornene monomers carrying nonprotected amino groups with ruthenium catalyst

Macromolecules

Volumn 42, Issue 5, 2009, Pages 1519-1525

  Sutthasupa, Sutthira ^a   Sanda, Fumio ^a   Masuda, Toshio ^b  

^a KYOTO UNIVERSITY   (Japan)

^b FUKUI UNIVERSITY OF TECHNOLOGY   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

AMINO GROUP; CATALYST CONCENTRATION; L-ALANINE; METHYL GROUP; MOLECULAR MECHANICS CALCULATIONS; NITROGEN ATOM; NMR SPECTROSCOPIC ANALYSIS; NORBORNENE; QUANTITATIVE YIELDS; RING OPENING METATHESIS POLYMERIZATION; RUTHENIUM CATALYSTS; SECOND GENERATION; SECONDARY AMINO GROUP; STEREOSTRUCTURE; SYNDIOTACTIC;

AMINATION; AMINES; AMINO ACIDS; CATALYSIS; CATALYSTS; HYDROCARBONS; MOLECULAR MECHANICS; MONOMERS; ORGANIC ACIDS; RING OPENING POLYMERIZATION; RUTHENIUM; SPECTROSCOPIC ANALYSIS; SYNTHESIS (CHEMICAL);

POLYMERS;

EID: 66549095975     PISSN: 00249297     EISSN: None     Source Type: Journal    
DOI: 10.1021/ma802243e     Document Type: Article

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36. In the cases of poly(1b) and poly(2b), trans-syndiotactic is the most preferable, and the second one is not cis-syndiotactic but trans-isotactic based on the results of calculation for metallacyclobutane intermediates. The reason for this discordance is not clear. If we could appropriately estimate the steric energies of monomer-coordinated ruthenium alkylidene intermediates and activation energies for the stereostructures, this point might become clearer. However, it was very difficult to construct reliable molecular models of these intermediates and activated complexes.