Coordination polymers and supramolecular solid-state architectures constructed from an organometallic tecton, bis(4-pyridyl)mercury

Four new 1-D coordination polymers have been assembled using bis(4-pyridyl)mercury (py(2)Hg) as spacer: (1)(infinity)[Mn(hfac)(2)(py(2)Hg)] 1, (1)(infinity)[[Zn(CH3COO)(2)(py(2)Hg)]center dot 2H(2)O 2; (1)(infinity)[[Ni(dipdtp)(2)(py(2)Hg)] 3 (dipdtp = O,O'-diisopropyldithiophosphato), (1)(infinity)[[Zn(H2O)(4)(py(2)Hg)]center dot(18C6)(ClO4)(2) 4 (18C6 = crown ether 1,4,7,10, 13,16-hexaoxacyclooctadecane). The crystal structures of 1, 3, and 4 consist of linear chains, while 2 shows a zigzag topology. The zigzag chains in 2 are assembled into supramolecular layers through weak Hg center dot center dot center dot O interactions, and are further linked into a 3-D framework by tetrameric water clusters. The structure of 3 is expanded into 2-D layers through weak Hg center dot center dot center dot S interactions. In crystal 4, the 18C6 molecules act as second coordination sphere ligands. The supramolecular 3-D network is sustained by hydrogen bonds and Hg center dot center dot center dot O interactions. The system [Cu-2(valpa)(2)]center dot(py(2)Hg) 5 was obtained from a co-crystallization process of py(2)Hg and the binuclear complex [Cu-2(valpa)(2)] (H-2 valpa is the Schiff base resulted from the condensation reaction between o-vanillin and propanolamine). The py(2)Hg molecules in 5 interact each other through N center dot center dot center dot Hg bonds generating layers with square meshes. The organometallic tecton, through the mercury atom, is involved in various weak interactions (Hg center dot center dot center dot O, Hg center dot center dot center dot N, Hg center dot center dot center dot S), which play an important role in sustaining the solid state architectures. (C) 2019 Elsevier Ltd. All rights reserved.