Rhodium and copper 6-methylpicolinate complexes. Structural diversity and supramolecular interaction study

Seven new coordination compounds with 6-methylpicolinic acid (6-HMepic) and rhodium(III) or copper (II) of formula [Rh(6-mepic)(3)] (1), [Ith(6-Mepic)(2)(H2O)Cl] (2), [Rh(6-HMepic)(6-Mepic)Cl-2].3.5(H2O) (3), [Cu(6-Mepic)(2)(H2O)].H2O (4), [Cu(6-Mepic)(2)](n), (5), [Cu(6-Mepic)(6-HMepic)I] (6) and [Cu(6-Mepic)(6HMepic)Cl] (7) have been obtained. Their syntheses have been rationalized, and their structural and supramolecular characteristics have been studied and compared with other similar rhodium and copper picolinate complexes previously reported, in order to stablish structural correlations and analogies. The electrical properties of coordination polymeri[Cu(6-Mepic)(2)](n) (5) have been also analyzed and it has been found that it shows a moderated electrical transport along the chain. (C) 2016 Published by Elsevier B.V.