An investigation into cyano substituted polypyrazolylborate complexes of palladium, platinum and iron

Polypyrazolylborates, also known as scorpionates, have been important ligands in inorganic chemistry since their introduction in the 1960s by Trofimenko. Our research group has been working with cyanopyrazoles, which have a CN subsituent in the 4-position, and alkyl or aryl substituents at the 3-position, or 3-and 5-positions. Reactions of palladium and platinum with Tp and Bp scorpionates have produced pyrazole complexes of interest, which were subsequently synthesized rationally. While no scorpionate complexes were completely characterized, the pyrazole complexes give information about the effects of the cyano group on the structure of compounds, especially when compared to similar compounds without the cyano substituent. Two new iron(II) cyanoscorpionates, (Tp^Cypr,4CN)₂Fe and (Tp^Ethyl,4CN)₂Fe, were synthesized, isolated, and characterized. These complexes are the first non-isomerized iron(II) cyanoscorpionates. These both are high spin at room temperature, and appear to be high spin down to 100K. Comparison to similar non-cyano compounds gives insight to the effect of the CN substituent on the structural, magnetic, and electronic properties.

Author

• Oberley, Alan Joseph

Identifier

hdl:10057/27419

OAI identifier oai:identifier

oai:soar.wichita.edu:10057/27419