Structural Influence of Hydrogen Bonding and ^r-Stacking in fra/is-Diazido-tetra- kis(pyrazole)nickel(II) and rra/is-Diazido-tetrakis(3-methylpyrazoIe)nickel(II)
نویسندگان
چکیده
Cungen Zhang, Christoph Janiak, and Horst Brombacher Institut für Anorganische und Analytische Chemie, Universität Freiburg, Albertstr. 21, D-79104 Freiburg Reprint requests to Prof. Dr. C. Janiak. Fax: +49 (0)761 203 6147. E-mail: [email protected] Z. Naturforsch. 56b, 1205-1208 (2001); received July 20, 2001 Nickel Complexes, ^-Stacking, Hydrogen Bonding The molecular nickel complexes fra«s-diazido-tetrakis(pyrazole)nickel(II) and trans-diazido-tetrakis(3-methylpyrazole)nickel(II) feature terminal monohapto-bound azide ligands. The pyrazole (pyr) ring planes are aligned along the Nazide-Ni-Nazide axis by intramolecular N-H—Nazide bonds. The crystal packing is controlled by jr-stacking between both pyrazole rings and azide ligands, N-H—Nazide hydrogen bonds, and intermolecular N-H—jrpyr and CH —N/jrazide interactions.
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