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

Hartbaum, Cornelia; Fischer, Helmut

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

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Date

1999

Authors

Hartbaum, Cornelia

Fischer, Helmut

Publication type

Journal article

Published in

Journal of Organometallic Chemistry ; 578 (1999), 1-2. - pp. 186-192. - ISSN 0022-328X. - eISSN 1872-8561

Abstract

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.

Subject (DDC)

540 Chemistry

Keywords

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

Cite This

ISO 690

HARTBAUM, Cornelia, Helmut FISCHER, 1999. Synthesis of triynylcarbene complexes and of bi- and trinuclear complexes with heptatriynylidene C7-bridges. In: Journal of Organometallic Chemistry. 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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