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Synthesis of triynylcarbene complexes and of bi- and trinuclear complexes with heptatriynylidene C7-bridges

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1999

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Hartbaum, Cornelia

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http://nbn-resolving.de/urn:nbn:de:bsz:352-230420
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https://doi.org/10.1016/S0022-328X(98)01121-8
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Journal of Organometallic Chemistry. 1999, 578(1-2), pp. 186-192. ISSN 0022-328X. eISSN 1872-8561. Available under: doi: 10.1016/S0022-328X(98)01121-8

Zusammenfassung

The dimethylamino(trimethylsilylhexatriynyl)carbene complex [(CO)5WC(NMe2)CCCCCCSiMe3] (2) was synthesized by two different routes: (a) by sequential reaction of the ethynylcarbene complex [(CO)5WC(NMe2)CCH] with nBuLi, CuI, and ICCCCSiMe3 and (b) by Cl2Pd(MeCN)2-catalyzed coupling of [(CO)5WC(NMe2)CCSnnBu3] with ICCCCSiMe3. Desilylation of 2 with KF/THF/MeOH afforded the hexatriynylcarbene complex [(CO)5WC(NMe2)CCCCCCH] (4). Deprotonation and coupling with ClSnnBu3 gave the C-stannylated carbene complex [(CO)5WC(NMe2)CCCCCCSnnBu3] (5). Reaction of 5 with nBuLi and [ClRu(CO)2Cp] afforded the heterobimetallic heptatriynylidene-bridged complex [(CO)5WC(NMe2)CCCCCCRu(CO)2Cp] (6). The trinuclear complex [(CO)5WC(NMe2)CCCCCC–Hg–CCCCCC(Me2N)CW(CO)5] (7) was obtained by reaction of 4 with nBuLi and HgCl2. All new compounds are stable at room temperature. Spectroscopic data suggest weak interaction of the metal centers in 6 and 7.

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Fachgebiet (DDC)
540 Chemie

Schlagwörter

Carbene complexes, Binuclear complexes, Tungsten, Ruthenium, Alkynyl complexes, Coupling reaction, Bridging ligands

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ISO 690HARTBAUM, Cornelia, Helmut FISCHER, 1999. Synthesis of triynylcarbene complexes and of bi- and trinuclear complexes with heptatriynylidene C7-bridges. In: Journal of Organometallic Chemistry. 1999, 578(1-2), pp. 186-192. ISSN 0022-328X. eISSN 1872-8561. Available under: doi: 10.1016/S0022-328X(98)01121-8
BibTex
@article{Hartbaum1999Synth-23042,
  year={1999},
  doi={10.1016/S0022-328X(98)01121-8},
  title={Synthesis of triynylcarbene complexes and of bi- and trinuclear complexes with heptatriynylidene C7-bridges},
  number={1-2},
  volume={578},
  issn={0022-328X},
  journal={Journal of Organometallic Chemistry},
  pages={186--192},
  author={Hartbaum, Cornelia and Fischer, Helmut}
}
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