{
  "abstract": "Mononuclear bis(carbyne) complexes featuring two multiply bonded carbyne ligands at a single metal center, are an exceptionally rare class of organometallic compounds. Despite considerable advances in multiple bonding involving heavier group 14 elements, the synthesis of their heavier congeners, bis(tetrylidyne) complexes [L n M(ER) 2 ] (E = Si–Pb), remains extremely challenging owing to the lack of suitable synthetic strategies. Herein we report experimental and theoretical studies of the Rhodium bis(tetrylidyne) complex salts [Rh(ETbb) 2 (PMe 3 ) 2 ][B(Ar F ) 4 ] ( [2-E][B(Ar F ) 4 ] ; E = Si, Ge; Tbb = C 6 H 2 -4- t Bu-2,6-(CH(SiMe 3 ) 2 ) 2 ; Ar F = C 6 H 3 -3,5-(CF 3 ) 2 ). The complexes [2-E][B(Ar F ) 4 ] were obtained by chloride abstraction of the tetrylidyne-chlorotetrylidene complexes [Rh(ETbb)(EClTbb)(PMe 3 ) 2 ] ( 1-E ) with Na[B(Ar F ) 4 ]. Complexes 1-E were prepared by a E≡E triple bond cleavage reaction of the ditetrylynes E 2 (Tbb) 2 with [RhCl(PMe 3 ) 2 ] 2 . The molecular structures of [2-E] + feature two almost linearly coordinated tetrel centers, that are bonded to the Rh center via two very short Rh−E bonds (Rh−Si1 = 2.1310(7) Å, Rh−Si2 = 2.1240(7) Å; Rh−Ge1 = 2.2093(2) Å, Rh−Ge2 = 2.1976(2) Å). The electronic structure calculations in combination with the assessment of the thermochemical properties corroborate the presence of two highly polar Rh≡E triple bonds in [2-E][B(Ar F ) 4 ] . Cyclic voltammetric studies show a reversible electrochemical oxidation and reduction of the cations [2-E] + . The electrophilic character of the tetrel center is reflected in the reactions of [2-E][B(Ar F ) 4 ] ] with LiMe yielding the tetrylidyne-methyltetrylidene complexes [Rh(ETbb)(EMeTbb)(PMe 3 ) 2 ] ( 5-E ).",
  "abstract_shown": true,
  "affiliations": [
    "Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, Mülheim/Ruhr, Germany, 45470",
    "Institut für Anorganische Chemie, Universität Bonn, Gerhard-Domagk-Str. 1, Bonn, Germany, 53121",
    "Fakultät Chemie und Biochemie, Organische Chemie I, Ruhr-Universität Bochum, Universitätsstr. 150, Bochum, Germany, 44801"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 5,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Kanishk Tomer",
      "orcid": "0000-0001-7652-0211"
    },
    {
      "affs": [
        1
      ],
      "name": "Jens Rump",
      "orcid": "0000-0001-5609-3865"
    },
    {
      "affs": [
        2
      ],
      "name": "Ujjal Das",
      "orcid": "0000-0002-1895-5767"
    },
    {
      "affs": [
        1
      ],
      "name": "Gregor Schnakenburg",
      "orcid": "0000-0001-6489-2106"
    },
    {
      "affs": [
        1
      ],
      "name": "Alexander C. Filippou",
      "orcid": "0000-0002-6225-8977"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/anajf89p9e3x9.bib",
  "cited_by": 0,
  "doi": "10.26434/chemrxiv.15011127/v1",
  "fulltext_url": null,
  "id": "anajf89p9e3x9",
  "issns": [],
  "landing_url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15011127/v1",
  "language": null,
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "1604|Synthesis and characterization of novel inorganic/organometallic compounds"
    ]
  ],
  "openalex": "W7223818190",
  "pdf_url": "https://chemrxiv.org/doi/pdf/10.26434/chemrxiv.15011127/v1",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-27",
  "publisher": "American Chemical Society (ACS)",
  "ris": "https://research.draconitic.com/paper/anajf89p9e3x9.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:26Z",
      "native_id": "10.26434/chemrxiv.15011127",
      "source": "chemrxiv",
      "url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15011127/v1"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:1604|Synthesis and characterization of novel inorganic/organometallic compounds",
      "subfield": "inorganic"
    }
  ],
  "title": "Metal Centered Cleavage of E≡E Bonds (E = Si, Ge): The Mononuclear Rhodium Bis(Tetrylidyne) Complexes [Rh(≡ER) ₂ (PMe ₃ ) ₂ ] ⁺",
  "title_text": "Metal Centered Cleavage of E≡E Bonds (E = Si, Ge): The Mononuclear Rhodium Bis(Tetrylidyne) Complexes [Rh(≡ER) ₂ (PMe ₃ ) ₂ ] ⁺",
  "type": "preprint",
  "updated_at": "2026-10-30T12:17:26Z",
  "url": "https://research.draconitic.com/paper/anajf89p9e3x9",
  "venue": "ChemRxiv",
  "versions": []
}