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Tantallacyclopentadiene as a unique metal-containing diene ligand coordinated to nickel for preparing tantalum–nickel heterobimetallic complexes

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Abstract

A mononuclear tantallacyclopentadiene complex, TaCl3(C4H2tBu2) (3), serves as a unique ligand to nickel: the addition of Ni(COD)2 to 3 selectively afforded heterobimetallic Ta–Ni complex 4. The cyclooctadiene ligand bound to the nickel center in complex 4 was readily substituted by monodentate and bidentate phosphine ligands, such as dimethylphenylphosphine, 1,2-bis(diphenylphosphino)ethane, and 1,2-bis(diethylphosphino)ethane, to give the corresponding phosphine complexes 5, 6a, and 6b. We also examined a ligand substitution reaction with 1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene (IPr) to produce the corresponding Ta–Ni complex 7. These newly prepared Ta–Ni heterobimetallic complexes were characterized spectroscopically together with the crystal structures of 4, 6a, and 7.

Graphical abstract: Tantallacyclopentadiene as a unique metal-containing diene ligand coordinated to nickel for preparing tantalum–nickel heterobimetallic complexes

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Publication details

The article was received on 08 Jul 2017, accepted on 13 Sep 2017 and first published on 15 Sep 2017


Article type: Paper
DOI: 10.1039/C7DT02481A
Citation: Dalton Trans., 2017, Advance Article
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    Tantallacyclopentadiene as a unique metal-containing diene ligand coordinated to nickel for preparing tantalum–nickel heterobimetallic complexes

    P. Laskar, K. Yamamoto, A. Srinivas, A. Mifleur, H. Nagae, H. Tsurugi and K. Mashima, Dalton Trans., 2017, Advance Article , DOI: 10.1039/C7DT02481A

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