{
  "abstract": "We previously reported the controlled coordination-insertion polymerization of 2-norbornene (NB) and 5-alkyl-2-norbornenes using a phosphinimide-ligated half-titanocene catalyst (1), affording high-molecular-weight polymers. In this study, the copolymerization of NB with α-olefins, including 1-octene (2), 1-octadecene (3), and 10-undecen-1-ol (4), was investigated to explore the monomer scope and functional group tolerance. Copolymers with Mn values ranging from 2.0 to 20 kg/mol were obtained in moderate to high yields. NB was consumed more rapidly than 2. Nuclear magnetic resonance (NMR) analysis of the copolymers suggests that an α-olefin-derived titanium alkyl species undergoes chain transfer via a σ-bond metathesis with NB, affording the 2-norbornenyl moiety at the initiating chain end. In addition, copolymers containing up to 7 mol% of 4 were obtained through protecting the hydroxyl group with methylaluminoxane (MAO) prior to polymerization. Collectively, catalyst 1 exhibited broad reactivity, including the coordination-insertion and the σ-bond metathesis reactions, while remaining catalytically active in the presence of the alkoxyaluminum species.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 2,
  "authors": [
    {
      "name": "Taiki Inoko"
    },
    {
      "name": "Shin-ichi Matsuoka",
      "orcid": "0000-0001-7488-9971"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/5dqwkz414t6qc.bib",
  "cited_by": 0,
  "doi": "10.26434/chemrxiv.15010152/v1",
  "fulltext_url": null,
  "id": "5dqwkz414t6qc",
  "issns": [],
  "landing_url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15010152/v1",
  "language": null,
  "licence": "CC-BY-NC-ND",
  "licence_label": "CC BY-NC-ND",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by-nc-nd/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "1605|Organometallic Complex Synthesis and Catalysis"
    ]
  ],
  "openalex": "W7221159179",
  "pdf_url": "https://chemrxiv.org/doi/pdf/10.26434/chemrxiv.15010152/v1",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-09",
  "publisher": "American Chemical Society (ACS)",
  "ris": "https://research.draconitic.com/paper/5dqwkz414t6qc.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:22Z",
      "native_id": "10.26434/chemrxiv.15010152",
      "source": "chemrxiv",
      "url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15010152/v1"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:1605|Organometallic Complex Synthesis and Catalysis",
      "subfield": "organic"
    }
  ],
  "title": "Coordination-Insertion Copolymerization of Norbornene with α-Olefins using Half-Titanocene Phosphinimide Catalyst",
  "title_text": "Coordination-Insertion Copolymerization of Norbornene with α-Olefins using Half-Titanocene Phosphinimide Catalyst",
  "type": "preprint",
  "updated_at": "2026-10-30T12:17:22Z",
  "url": "https://research.draconitic.com/paper/5dqwkz414t6qc",
  "venue": "ChemRxiv",
  "versions": []
}