Synthesis and crystal structure of a new three-dimensional Pb(II)/Ni(II) coordination polymer based on 2,6-dimethyl-pyridine-3,5-dicarboxylic acid

Abstract

A new Ni(II) and Pb(II) polymer [NiPb(dpdc)]_n 1 (H₂dpdc = 2,6-dimethyl-pyridine-3,5-dicarboxylic acid) was synthesized under hydrothermal conditions. The compound crystallizes in the triclinic system, space group P-1 with the final R = 0.0243 and wR = 0.0579 for 3590 observed reflections with I > 2σ(I). The compound presents a three-dimensional (3 D) network extended by dpdc^2- anions employing a chelating coordination mode. From the topology point of view, the structure could be described as a (3,4)-connected 3 D network with (4.8.10)(8².10)₂(4.8.10³.12) topology net. Infrared spectroscopy, elemental analyses, thermogravimetric analysis and the single-crystal X-ray diffraction properties of 1 are also investigated.

Keywords:

• 2,6-dimethyl-pyridine-3,5-dicarboxylic acid
• coordination polymer
• crystal structure

Disclosure statement

No potential conflict of interest was reported by the author.

Additional information

Funding

The Institutions of higher learning was supported this work key scientific research project of Henan Province (20A150028; 21A413001; KJQN202001212) and the Natural Science Foundation (182102310909; 212102310991) of Henan Province.