Sandwich compounds of cyanotrispyrazolylborates: complexation-induced ligand isomerization

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Authors
Zhao, Ningfeng
Van Stipdonk, Michael J.
Bauer, Cary
Campana, Charles
Eichhorn, David M.
Issue Date
2007-10-15
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Article
Language
eng
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Abstract

Reaction of the new cyanoscorpionate ligand, hydrotris(4-cyano-3-phenyl)pyrazolylborate (Tp(Ph),(4CN)) with Co(II), Mn(II), and Fe(II) unexpectedly results in the isolation only of crystals containing sandwich complexes in which the ligands have been isomerized to produce the heterocyanoscorpionate hydrobis(4-cyano-3-phenylpyrazolyl)(4-cyano-5-phenylpyrazolyl)borate (Tp(Ph),(4CN*)). The three complexes have been characterized crystallographically and are isostructural, with each ligand acting in a tridentate manner toward the metal. The isomerization of the ligand appears to be more facile than that of the analogous non-cyano ligand, Tp(Ph), with which crystals of the unisomerized sandwich compound have been isolated for Mn(II) and Fe(II).

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Citation
Inorganic chemistry. 2007 Oct 15; 46(21): 8662-7.
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American Chemical Society
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0020-1669
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