Inorganica Chimica Acta, ( ISI ), Volume (458), Year (2017-1) , Pages (84-96)

Title : ( Synthesis, single crystal X-ray characterization, and solution studies of Zn(II)-, Cu(II)-, Ag(I) - and Ni(II)-pyridine-2,6-dipicolinate N-oxide complexes with different topologies and coordination modes )

Authors: mina shahbazi , farzaneh mehrzad , Masoud Mirzaei Shahrabi , Hossein Eshtiagh Hosseini , Joel T. Mague , Mehdi Ardalani , Mojtaba Shamsipur ,

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In this paper, we have synthesized two new coordination complexes and two coordination polymers at room temperature formulated as}(Htata)2[Cu(pydco)2(tata)]·3H2O{ (1), {(H9a-acr)2·[Ni0.51Zn0.49(pydco)2(H2O)2]·4H2O} (2),] Cu(pydco)(H2O)2[n (3), [Ag(Hpydco)(2a-pym)]n (4) in which pydco = pyridine-2,6-dicarboxylic acid N-oxide, tata = 2,4,6-triamino-1,3,5-triazine (melamine), 9a-acr = 9-aminoacridine and 2a-pym = 2-aminopyrimidine. The structures of these compounds and their physical and chemical properties were characterized via elemental analysis, infrared spectroscopy and single crystal X-ray diffraction methods. Complex 1 has a honeycomb-like 2-D network whilst complex 2 is a mixed crystal with almost equal amounts of Ni and Zn in the metal sites and has a 4-connected {4^4.6^2}topology. Complexes 3 and 4 display coordination modes for the pydco ligand which differ from those of previous reports. Complex 3 forms a 1-D 3-connected staircase-like network with unequal footsteps and possess a {4^2.6} topology while 4 is a 2-D staircase-like 4-connected network with a {4^4.6^2} topology exhibiting rectangular grids Ag─Ag interactions. In the structures of 1–4 several supramolecular interactions like hydrogen-bonding and π···π and lone pair···π stacking interactions play important roles in the formation and stability of the crystalline materials. The complexation reactions of these systems with Cu2+ and Ag+ ions were investigated by potentiometric pH titration method (solution studies). The stoichiometry of the most abundant species in the solution was very similar to the corresponding crystalline metal ion complexes.

Keywords

, crystal engineering; pyridine-2, 6-dicarboxylic acid N-oxide; proton transfer; coordination polymer; mixed crystal; solution
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@article{paperid:1060178,
author = {Shahbazi, Mina and Mehrzad, Farzaneh and Mirzaei Shahrabi, Masoud and Eshtiagh Hosseini, Hossein and Joel T. Mague and Mehdi Ardalani and Mojtaba Shamsipur},
title = {Synthesis, single crystal X-ray characterization, and solution studies of Zn(II)-, Cu(II)-, Ag(I) - and Ni(II)-pyridine-2,6-dipicolinate N-oxide complexes with different topologies and coordination modes},
journal = {Inorganica Chimica Acta},
year = {2017},
volume = {458},
month = {January},
issn = {0020-1693},
pages = {84--96},
numpages = {12},
keywords = {crystal engineering; pyridine-2;6-dicarboxylic acid N-oxide; proton transfer; coordination polymer; mixed crystal; solution studies},
}

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%0 Journal Article
%T Synthesis, single crystal X-ray characterization, and solution studies of Zn(II)-, Cu(II)-, Ag(I) - and Ni(II)-pyridine-2,6-dipicolinate N-oxide complexes with different topologies and coordination modes
%A Shahbazi, Mina
%A Mehrzad, Farzaneh
%A Mirzaei Shahrabi, Masoud
%A Eshtiagh Hosseini, Hossein
%A Joel T. Mague
%A Mehdi Ardalani
%A Mojtaba Shamsipur
%J Inorganica Chimica Acta
%@ 0020-1693
%D 2017

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