skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Stereospecific Ring-Opening Metathesis Polymerization (ROMP) of endo -Dicyclopentadiene by Molybdenum and Tungsten Catalysts

Journal Article · · Macromolecules

Here we report an examination of the ring-opening metathesis polymerization (ROMP) of endo-dicyclopentadiene (DCPD) by 10 well-defined molybdenum-based and 16 tungsten-based alkylidene initiators. Five tungsten-based MAP (monoaryloxide pyrrolide) initiators with the general formula W(X)(CHCMe2Ph)(Me2Pyr)(OAr) (X = arylimido, alkylimido, or oxo; Me2Pyr =2,5-dimethylpyrrolide; OAr = an aryloxide) were found to yield >98% cis, >98% syndiotactic poly(DCPD); they are W(N-t-Bu)(CHCMe3)(pyr)(OHMT) (2, OHMT = O-2,6-(2,4,6-Me3C6H2)2C6H3, pyr = pyrrolide), W(N-2,6-i-Pr2C6H3)(CHCMe2Ph)(pyr)(OHMT) (3), W(O)(CHCMe2Ph)(Me2Pyr)(OHMT)(PPh2Me) (7, Me2Pyr =2,5-dimethylpyrrolide), W(O)(CHCMe2Ph)(Me2Pyr)(ODFT)(PPh2Me) (9, ODFT = O-2,6-(C6F5)2C6H3), and W(O)(CHCMe2Ph)(Me2Pyr)(OTPP)(PMePh2) (10, OTPP = O-2,3,5,6-Ph4C6H). Two biphenolate alkylidene complexes, Mo(N-2,6-Me2C6H3)(CHCMe2Ph)(rac-biphen) (17) and W(N-2,6-Me2C6H3)(CHCMe2Ph)(rac-biphen) (22, biphen =3,3'-(t-Bu)2-5,5'-6,6'-(CH3)4-1,1'-biphenyl-2,2'-diolate), were found to yield >98% cis, >98% isotactic poly(DCPD). Cis, syndiotactic or cis, isotactic poly(DCPD)s (made with 50–1000 equiv of DCPD) are accessible within seconds to minutes in dichloromethane at room temperature. No isomerization or cross-linking reactions are determined, and addition of a chain transfer reagent (1-hexene) or the use of THF as a solvent does not decrease the stereospecificity of the polymerizations. Cis, syndiotactic and cis, isotactic poly(DCPD)s can be distinguished readily from each other by 13C NMR spectroscopy. Hydrogenation of each stereoregular poly(DCPD) produces H-poly(DCPD)s that have melting points near 270 °C (syndiotactic) or 290 °C (isotactic) and high crystallinities (wc = 0.83 for syndiotactic and wc = 0.74 for isotactic).

Research Organization:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
FG02-86ER13564
OSTI ID:
1557801
Journal Information:
Macromolecules, Vol. 48, Issue 8; ISSN 0024-9297
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 64 works
Citation information provided by
Web of Science

References (58)

Ring-opening Polymerization of Norbornene and Its Derivatives by MoCl5, WCl6 and ReCl5 Catalysts journal January 1968
Polymerization of Dicyclopentadiene:  A Tale of Two Mechanisms journal January 1996
The polymerization of dicyclopentadiene: an investigation of mechanism journal July 1998
Ring-opening polymerization of endo and exo-dicyclopentadiene and their 7,8-dihydro derivatives journal July 1986
Stereospecific Ring-Opening Metathesis Polymerization of endo-Dicyclopentadiene by Schrock–Hoveyda Catalyst and Novel Mo- and W-based Complexes. Development of Crystalline Hydrogenated Poly(endo-dicyclopentadiene) journal August 2003
Hydrogenated Ring-Opened Poly(endo-dicyclopentadiene)s Made via Stereoselective ROMP Catalyzed by Tungsten Complexes: Crystalline Tactic Polymers and Amorphous Atactic Polymer journal June 2006
Stereospecific Ring-Opening Metathesis Polymerization of Cycloolefins Using Novel Molybdenum and Tungsten Complexes Having Biphenolate Ligands. Development of Crystalline Hydrogenated Poly(endo-dicyclopentadiene) and Poly(norbornene) journal October 2003
Recent Advances in High Oxidation State Mo and W Imido Alkylidene Chemistry journal August 2009
High Oxidation State Multiple Metal−Carbon Bonds journal January 2002
Ruthenium-Based Heterocyclic Carbene-Coordinated Olefin Metathesis Catalysts journal March 2010
Homogeneous Metathesis Polymerization by Well-Defined Group VI and Group VIII Transition-Metal Alkylidenes:  Fundamentals and Applications in the Preparation of Advanced Materials journal April 2000
Living ring-opening metathesis polymerization journal January 2007
Bioactive and Therapeutic ROMP Polymers journal July 2007
Polymer-Supported Well-Defined Metathesis Catalysts journal November 2008
Synthesis of chiral molybdenum ROMP initiators and all-cis highly tactic poly(2,3-(R)2norbornadiene) (R = CF3 or CO2Me) journal May 1993
Polymerization of Enantiomerically Pure 2,3-Dicarboalkoxynorbornadienes and 5,6-Disubstituted Norbornenes by Well-Characterized Molybdenum Ring-Opening Metathesis Polymerization Initiators. Direct Determination of Tacticity in Cis, Highly Tactic and Trans, Highly Tactic Polymers journal April 1994
Ring Opening Metathesis Polymerization with Binaphtholate or Biphenolate Complexes of Molybdenum journal January 1996
Exploring Factors That Determine Cis/Trans Structure and Tacticity in Polymers Prepared by Ring-Opening Metathesis Polymerizations with Initiators of the Type syn- and anti-Mo(NAr)(CHCMe2Ph)(OR)2. Observation of a Temperature-Dependent Cis/Trans Ratio journal August 1995
Synthesis of Molybdenum Imido Alkylidene Complexes That Contain 3,3‘-Dialkyl-5,5‘,6,6‘-tetramethyl-1,1‘-biphenyl-2,2‘-diolates (Alkyl = t -Bu, Adamantyl). Catalysts for Enantioselective Olefin Metathesis Reactions journal August 2000
Precise Control of Polyolefin Stereochemistry Using Single-Site Metal Catalysts journal April 2000
Stereoselective Polymerization with Single-Site Catalysts book November 2007
Living Ring-Opening Metathesis Polymerization of Cyclopropenes journal February 2006
Stereospecific Ring-Opening Metathesis Polymerization of 3-Methyl-3-phenylcylopropene by Molybdenum Alkylidene Initiators journal May 2008
Z-Selective Olefin Metathesis Processes Catalyzed by a Molybdenum Hexaisopropylterphenoxide Monopyrrolide Complex
  • Flook, Margaret M.; Jiang, Annie J.; Schrock, Richard R.
  • Journal of the American Chemical Society, Vol. 131, Issue 23, p. 7962-7963 https://doi.org/10.1021/ja902738u
journal June 2009
Z-Selective Ring-Opening Metathesis Polymerization of 3-Substituted Cyclooctenes by Monoaryloxide Pyrrolide Imido Alkylidene (MAP) Catalysts of Molybdenum and Tungsten journal August 2013
Five-Coordinate Rearrangements of Metallacyclobutane Intermediates during Ring-Opening Metathesis Polymerization of 2,3-Dicarboalkoxynorbornenes by Molybdenum and Tungsten Monoalkoxide Pyrrolide Initiators journal August 2012
Z-Selective and Syndioselective Ring-Opening Metathesis Polymerization (ROMP) Initiated by Monoaryloxidepyrrolide (MAP) Catalysts journal September 2010
Synthesis of cis,syndiotactic ROMP Polymers Containing Alternating Enantiomers
  • Flook, Margaret M.; Ng, Victor W. L.; Schrock, Richard R.
  • Journal of the American Chemical Society, Vol. 133, Issue 6, p. 1784-1786 https://doi.org/10.1021/ja110949f
journal January 2011
Tungsten Oxo Alkylidene Complexes as Initiators for the Stereoregular Polymerization of 2,3-Dicarbomethoxynorbornadiene journal April 2014
Stereospecific Ring-Opening Metathesis Polymerization of Norbornadienes Employing Tungsten Oxo Alkylidene Initiators journal July 2014
Synthesis of Stereoregular Polymers through Ring-Opening Metathesis Polymerization journal June 2014
Synthesis of stereoregular ROMP polymers using molybdenum and tungsten imido alkylidene initiators journal May 2011
Syndiospecific Ring-opening Metathesis Polymerization of endo-Dicyclopentadiene by Tungsten(VI) Phenylimido Catalyst journal November 2005
A New Method for Catalytic Syntheses of Block Copolymers via ROMP: Development of Stereoblock Copoly(endo-dicyclopentadiene) journal May 2008
Syndioselective Ring-Opening Metathesis Polymerization of endo-Dicyclopentadiene with Tungsten Complexes Having Imido Ligands: Development of Crystalline Syndiotactic Hydrogenated Poly(endo-dicyclopentadiene) journal December 2005
13C N.m.r. Spectra of ring-opened polymers of 1-methylbicyclo[2.2.1]hept-2-ene and their hydrogenated products journal March 1984
Highly Z -Selective Metathesis Homocoupling of Terminal Olefins journal November 2009
Synthesis and ROMP Chemistry of Decafluoroterphenoxide Molybdenum Imido Alkylidene and Ethylene Complexes journal May 2013
Z-Selective Olefin Metathesis Reactions Promoted by Tungsten Oxo Alkylidene Complexes
  • Peryshkov, Dmitry V.; Schrock, Richard R.; Takase, Michael K.
  • Journal of the American Chemical Society, Vol. 133, Issue 51, p. 20754-20757 https://doi.org/10.1021/ja210349m
journal December 2011
Synthesis of Tungsten Oxo Alkylidene Complexes journal October 2012
B(C6F5)3 Activation of Oxo Tungsten Complexes That Are Relevant to Olefin Metathesis journal September 2013
Molybdenum Imido Alkylidene Metathesis Catalysts That Contain Electron-Withdrawing Biphenolates or Binaphtholates journal April 2007
Synthesis and ring opening metathesis polymerisation of isoxazolino- and isoxazolidino-norbornenes journal May 2006
Catalytic properties of novel chiral polyoxomolybdate(VI) salts: The ring-opening metathesis polymerization (ROMP) of norbornene journal April 1996
Living ring-opening metathesis polymerization of 2,3-difunctionalized norbornadienes by Mo(:CHBu-tert)(:NC6H3Pr-iso2-2,6)(OBu-tert)2 journal November 1990
Rotational isomers of molybdenum(VI) alkylidene complexes and cis/trans polymer structure: investigations in ring-opening metathesis polymerization journal December 1993
Industrialization and application development of cyclo-olefin polymer journal April 2004
Determination of the Tacticity of Ring-opened Metathesis Polymers of Norbornene and Norbornadiene by13C NMR Spectroscopy of their Hydrogenated Derivatives journal September 1996
Equilibrium Control of Crystal Thickness and Melting Point through Block Copolymerization journal August 2004
Hydrogenated Ring-Opened Polynorbornene:  A Highly Crystalline Atactic Polymer journal February 2005
Synthesis of molybdenum imido alkylidene complexes and some reactions involving acyclic olefins journal May 1990
Syntheses of Tungsten tert-Butylimido and Adamantylimido Alkylidene Complexes Employing Pyridinium Chloride As the Acid journal August 2012
Z -Selective Metathesis Homocoupling of 1,3-Dienes by Molybdenum and Tungsten Monoaryloxide Pyrrolide (MAP) Complexes journal July 2012
Endo -Selective Enyne Ring-Closing Metathesis Promoted by Stereogenic-at-Mo Monoalkoxide and Monoaryloxide Complexes. Efficient Synthesis of Cyclic Dienes Not Accessible through Reactions with Ru Carbenes journal July 2009
Bipyridine Adducts of Molybdenum Imido Alkylidene and Imido Alkylidyne Complexes journal May 2012
Alkylidene and Metalacyclic Complexes of Tungsten that Contain a Chiral Biphenoxide Ligand. Synthesis, Asymmetric Ring-Closing Metathesis, and Mechanistic Investigations journal March 2003
Synthesis of Tungsten Imido Alkylidene Complexes that Contain an Electron-Withdrawing Imido Ligand journal September 2014
Synthesis of Molybdenum and Tungsten Alkylidene Complexes That Contain Sterically Demanding Arenethiolate Ligands journal September 2014

Cited By (7)

Rapid, Regioselective Living Ring-Opening Metathesis Polymerization of Bio-Derivable Asymmetric Tricyclic Oxanorbornenes journal January 2018
Photoinitiated ring‐opening metathesis polymerization journal August 2019
Functional Precision Polymers via Stereo- and Regioselective Polymerization Using Group 6 Metal Alkylidene and Group 6 and 8 Metal Alkylidene N -Heterocyclic Carbene Complexes journal August 2018
Tuning thermal properties of cross-linked DCPD polymers by functionalization, initiator type and curing methods journal January 2020
Addition Oligomerization of Dicyclopentadiene: Reactivity of Endo and Exo Isomers and Postmodification journal March 2017
Synthesis of Poly(norbornene-methylamine), a Biomimetic of Chitosan, by Ring-Opening Metathesis Polymerization (ROMP) journal July 2017
Recent advances in metathesis-derived polymers containing transition metals in the side chain journal December 2015