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

A mononuclear tantallacyclopentadiene complex, TaCl (C H tBu ) (3), serves as a unique ligand to nickel: the addition of Ni(COD) 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 bi...

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Published in:Dalton transactions : an international journal of inorganic chemistry 2017-10, Vol.46 (38), p.13043-13054
Main Authors: Laskar, Payel, Yamamoto, Keishi, Srinivas, Anga, Mifleur, Alexis, Nagae, Haruki, Tsurugi, Hayato, Mashima, Kazushi
Format: Article
Language:English
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Summary:A mononuclear tantallacyclopentadiene complex, TaCl (C H tBu ) (3), serves as a unique ligand to nickel: the addition of Ni(COD) 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.
ISSN:1477-9226
1477-9234
DOI:10.1039/c7dt02481a