Jump to main content
Jump to site search

Issue 29, 2011
Previous Article Next Article

Synthesis of stereoregular ROMPpolymers using molybdenum and tungsten imido alkylidene initiators

Author affiliations

Abstract

Three of the four possible structures for polymers formed from an achiral monomer through a single ROMP polymerization step have been prepared for a small collection of monomers. Trans,syndiotactic structures have been prepared through chain end control, cis,isotactic polymers have been prepared through enantiomorphic site control, and cis,syndiotactic polymers have been prepared through stereogenic metal control. Stereogenic metal control at the metal center as a means of forming syndiotactic polymers is virtually unknown. Synthesis of ROMP polymers with a regular structure that contain alternating enantiomers from a racemic mixture of monomers is a natural consequence of stereogenic metal control. Ruthenium catalysts do not display ROMP specificities analogous to those described here, perhaps since alkylidene isomers have not been observed for Ru catalysts and the barrier to rotation of the carbene in a generic NHC dichloride Ru catalyst has been calculated to be relatively low.

Graphical abstract: Synthesis of stereoregular ROMP polymers using molybdenum and tungsten imido alkylidene initiators

Back to tab navigation

Publication details

The article was received on 08 Feb 2011, accepted on 23 Mar 2011 and first published on 05 May 2011


Article type: Perspective
DOI: 10.1039/C1DT10215J
Dalton Trans., 2011,40, 7484-7495

  •   Request permissions

    Synthesis of stereoregular ROMP polymers using molybdenum and tungsten imido alkylidene initiators

    R. R. Schrock, Dalton Trans., 2011, 40, 7484
    DOI: 10.1039/C1DT10215J

Search articles by author

Spotlight

Advertisements