Inorganic–organic hybrid structure: Synthesis, structure and magnetic properties of a cobalt phosphite–oxalate, $[C_4N_2H_{12}][Co_4(HPO_3)_2(C_2O_4)_3]$

Mandal, Sukhendu and Natarajan, Srinivasan (2005) Inorganic–organic hybrid structure: Synthesis, structure and magnetic properties of a cobalt phosphite–oxalate, $[C_4N_2H_{12}][Co_4(HPO_3)_2(C_2O_4)_3]$. In: Journal of Solid State Chemistry, 178 (7). pp. 2376-2382.

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Abstract

A hydrothermal reaction of a mixture of cobalt (II) oxalate, phosphorous acid, piperazine and water at $150^oC$ for 96 h followed by heating at $180^oC$ for 24 h gave rise to a new inorganic–organic hybrid solid, $[C_4N_2H_{12}][Co_4(HPO_3)_2(C_2O_4)_3]$, I. The structure consists of edge-shared $CoO_6$ octahedra forming a $[Co_2O_{10}]$ dimers that are connected by $HPO_3$ and $C_2O_4$ units forming a three-dimensional structure with one-dimensional channels. The amine molecules are positioned within these channels. The oxalate units have a dual role of connecting within the plane of the layer as well as out of the plane. Magnetic susceptibility measurement shows the compound orders antiferromagnetically at low temperature $(T_N=22K)$. Crystal data: I, monoclinic, space group = $P2_1/_c$ (No. 14). a=7.614(15), b=7.514(14), c=17.750(3)\AA , $\beta=97.351(3)^o$, $V=1007.30(3)\AA^3$, Z=2, $\rho_{calc}=2.466g/cm^3$, $\mu(MoK\alpha)=3.496mm^{-1}, R_1=0.0310$ and $wR_2=0.0807$ data $[I>2\sigma(I)]$.

Item Type:	Journal Article
Publication:	Journal of Solid State Chemistry
Publisher:	Elsevier
Additional Information:	Copyright of this article belongs to Elsevier.
Keywords:	Inorganic–organic hybrid; Cobalt; Channels structure; Antiferromagnetic
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	15 Mar 2007
Last Modified:	19 Sep 2010 04:35
URI:	http://eprints.iisc.ac.in/id/eprint/9742

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