A mixed carboxylate polymer as an intermediate during synthesis of mononuclear bis-3, 5-dimethylpyrazole copper(II) benzoates

Abstract

The crystal structures of bis-3,5-dimethylpyrazole copper(II) 4-methylbenzoate, bis-3,5-dimethylpyrazole copper(II) 3-methylbenzoate, bis-3,5-dimethylpyrazole copper(II) 4-nitrobenzoate show that 3,5-dimethylpyrazole in the cis or trans positions is related to axial distortion of Cu-O bond in carboxylate groups. A metastable mixed carboxylate co-ordination polymer presumably intermediate to the one described above which has alternate paddlewheel and mononuclear units is structurally characterized.

Keywords:

• Co-ordination polymer
• Copper carboxylates
• 3,5-Dimethylpyrazole
• Metastable complex

Acknowledgement

The authors thank the Department of Science and Technology, New-Delhi, India for financial support.