Mononuclear metal phosphinates with ancillary pyrazole ligands. Synthesis and X-ray crystal structures of [M(Ph2PO2)(2)(3,5-DMPZ)(2)] (M = Co, Zn)

by Chandrasekhar, Vadapalli; Boomishankar, Ramamoorthy; Sasikumar, Palani; Nagarajana, L.; Cordes, A. Wallace

The reaction of diphenylphosphinic acid, [Ph2P(O)(OH)], with CoCl2 or ZnCl2 and 3,5-dimethylpyrazole (DMPZ) in the presence of triethylamine affords the mononuclear phosphinates, M(Ph2PO2)(2)(DMPZ)(2) (M= Co(1), Zn(2)). The molecular structures of I and 2 reveal a tetrahedral environment around the metal. The phosphinate ligands are monoanionic and bind to the metal in a monodentate manner, while the pyrazole ligands act as neutral monodentate ligands. Intermolecular C-H-O and pi-pi interactions in 1 and 2 result in the generation of two dimensional supramolecular polymeric sheets in the solid state.

Journal
Zeitschrift für Anorganische und Allgemeine Chemie
Volume
631
Issue
13-14
Year
2005
Start Page
2727
ISBN/ISSN
1521-3749; 0044-2313
DOI
10.1002/zaac.200500118