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A Tetragonal and an Uncommon Trigonal Dicobalt Paddlewheel Compound

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Abstract

Two dicobalt compounds containing Co–Co bonds with DAniF ligands (DAniF = N,N′-di-p-anisylformamidinate) were synthesized and characterized by X-ray crystallography. One has a typical tetragonal paddlewheel structure, Co2(DAniF)4 (1), while the other one has a rare trigonal paddlewheel structure with three formamidinate ligands spanning a low oxidation state in the Co 3+2 unit in Co2(DAniF)3 (2). The singly bonded Co–Co distance in the Co 4+2 unit in 1 is 2.3580(16) Å while the Co–Co bond distance in 2 is 2.3773(5) Å. The average torsion angles are 10.46° and 2.34° for 1 and 2, respectively. Compound 1 is diamagnetic but 2 is paramagnetic as shown by the 1H NMR spectra.

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Acknowledgements

We thank the Robert A. Welch Foundation and Texas A&M University for financial support.

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Authors and Affiliations

  1. Department of Chemistry and Laboratory for Molecular Structure and Bonding, Texas A&M University, P. O. Box 3012, College Station, TX, 77842-3012, USA

    F. Albert Cotton, Zhong Li, Carlos A. Murillo & Pavel V. Poplaukhin

  2. X-ray Diffraction Laboratory, Texas A&M University, College Station, TX, 77842-3012, USA

    Joseph H. Reibenspies

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  1. F. Albert Cotton
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  2. Zhong Li
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  3. Carlos A. Murillo
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  4. Pavel V. Poplaukhin
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  5. Joseph H. Reibenspies
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Corresponding author

Correspondence to Carlos A. Murillo.

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Dedicated to the memory of F. A. Cotton, a great mentor and friend.

F. Albert Cotton—Deceased February 20, 2007.

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Cotton, F.A., Li, Z., Murillo, C.A. et al. A Tetragonal and an Uncommon Trigonal Dicobalt Paddlewheel Compound. J Clust Sci 19, 89–97 (2008). https://doi.org/10.1007/s10876-007-0151-8

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  • DOI: https://doi.org/10.1007/s10876-007-0151-8

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