4.6 Article

The Tetracyanopyridinide Dimer Dianion, σ-[TCNPy]22-

Journal

CHEMISTRY-A EUROPEAN JOURNAL
Volume 22, Issue 35, Pages 12312-12315

Publisher

WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201603071

Keywords

bonding; crystal structure; cyanides; cyanocarbon; radical ions

Funding

  1. NSF MRSEC Grant [DMR-1121252 CFDA, 47.049]
  2. MINECO [MAT2014-54025-P]
  3. DGU [2014 SGR 1422]

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The reaction of 2,3,5,6-tetracyanopyridine (TCNPy) and Cr(C6H6)(2) forms diamagnetic sigma-[TCNPy](2)(2-) possessing a 1.572(3)angstrom intrafragment sp(3)-sp(3) bond. This is in contrast to the structurally related 1,2,4,5-tetracyanobenzene and 1,2,4,5-tetracyanopyrazine that form -dimer dianions possessing long, multicenter bonds.

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