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Isostructurality of complexes of the type tetraaquabis(isonicotinato)metal(II)

Birinchi K. Das; Sanchay J. Bora; Monideepa Chakrabortty

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    <subfield code="c">317-327</subfield>
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    <subfield code="a">Birinchi K. Das</subfield>
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    <subfield code="a">Isostructurality of complexes of the type tetraaquabis(isonicotinato)metal(II)</subfield>
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    <subfield code="a">&lt;p&gt;Department of Chemistry, Gauhati University, Guwahati- 781 014, Assam, India&lt;/p&gt;


&lt;p&gt;Manuscript received online 14 April 2018, revised 18 January 2019, accepted 21 January 2019&lt;/p&gt;

&lt;p&gt;Structural investigations on a series of six analogous metal(II) isonicotinate tetrahydrates, M(iso)&lt;sub&gt;2&lt;/sub&gt; (H&lt;sub&gt;2&lt;/sub&gt;O)&lt;sub&gt;4&lt;/sub&gt; with M = Mn, Fe, Co, Ni, Cu and Zn, all crystallizing in P1&amp;uml; space symmetry, have been carried out. In the crystal structure of each of the six metal complexes of type tetraaquabis(isonicotinato)metal(II), extensive intermolecular hydrogen bonds involving all possible donor and acceptor sites lead to the formation of a 3D supramolecular network that has been analysed by the graph-set approach. Their comparable lattice parameters and similar PXRD patterns indicate close structural similarity within the series. However, the crystallographic isostructurality of the species evaluated by the method of K&amp;aacute;lm&amp;aacute;n and F&amp;aacute;bi&amp;aacute;n suggests that the Cu species presents some differences from the rest. In an overall sense, this behaviour is reflective of the Irving-Williams order of stability of octahedral complexes formed by bivalent metal ions.&lt;/p&gt;</subfield>
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