2d Coordination Polymers Of Macrocyclic Oxamide With Polycarboxylates: Syntheses, Crystal Structures And Magnetic Properties

Five new 2D coordination polymers, [Co(nip)(CuL)(H2O)]center dot CH3OH (1), [Mn(ip)(NiL)]center dot 0.63H(2)O (2), [Cu(ip)(CuL)] (3), [Mn-6(CuL)(6)(btc)(4)(H2O)(4)]center dot 7H(2)O (4), and [Cu(CuL)(Hbtc)(H2O)] (5)(ML, H2L = 2,3-dioxo-5,6,14,15-dibenzo-1,4,8,12-tetraazacyclo-pentadeca-7,13-diene; H(2)nip = 5-nitroisophthalic acid; H(2)ip = m-isophthalic acid; H(3)btc = 1,3,5-benzenetricarboxylic acid) have been synthesized by a solvothermal method and characterized by single-crystal X-ray diffraction. Complexes 1-5 exhibit different 2D layered structures formed by Co2Cu2 (1), Mn2Ni2 (2), Cu-4 (3), Mn3Ni3 (4), Cu-4 (5) units, respectively, via the oxamide and diverse carboxylic acid bridges. Compounds 1, 2, 3 and 5 are uninodal 4-connected (4, 4)-grids topology, while complex 4 possesses a 2D network with (3, 4)-connected (4(2).8)(4)(4(3).6(2).8)(3) topology. The results of magnetic determination show pronounced antiferromagnetic interactions in 1-4.