Serveur d'exploration sur le cobalt au Maghreb

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trans-Diaqua­bis­[2,5-bis­(pyridin-2-yl)-1,3,4-thia­diazole]cobalt(II) bis­(tetra­fluoridoborate)

Identifieur interne : 000041 ( Maroc/Analysis ); précédent : 000040; suivant : 000042

trans-Diaqua­bis­[2,5-bis­(pyridin-2-yl)-1,3,4-thia­diazole]cobalt(II) bis­(tetra­fluoridoborate)

Auteurs : Fouad Bentiss [Maroc] ; Frédéric Capet [France] ; Michel Lagrenée [France] ; Mohamed Saadi [Maroc] ; Lahcen El Ammari [Maroc]

Source :

RBID : PMC:3151744

Abstract

The bidentate 1,3,4-thia­diazole ligand substituted by two 2-pyridyl rings (denoted L) has been found to produce the new monomeric title complex, [Co(C12H8N4S)2(H2O)2](BF4)2. The thia­diazole and pyridyl rings surrounding the Co atom are almost coplanar [dihedral angle = 4.35 (7)°]. The mean plane defined by these heterocyclic moieties makes a dihedral angle of 18.72 (6)° with the non-coordinated pyridyl ring. The Co2+ cation, located at a crystallographic center of symmetry, is bonded to two ligands and two water mol­ecules in a trans configuration in an octa­hedral environment. The tetra­fluorido­­borate ions can be regarded as free anions in the crystal lattice. Nevertheless, they are involved in an infinite two-dimensional network along the [010] and [101] directions of O—H⋯F hydrogen bonds.


Url:
DOI: 10.1107/S1600536811020125
PubMed: 21836842
PubMed Central: 3151744


Affiliations:


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PMC:3151744

Le document en format XML

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-Diaqua­bis­[2,5-bis­(pyridin-2-yl)-1,3,4-thia­diazole]cobalt(II) bis­(tetra­fluoridoborate)</title>
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-Diaqua­bis­[2,5-bis­(pyridin-2-yl)-1,3,4-thia­diazole]cobalt(II) bis­(tetra­fluoridoborate)</title>
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<p>The bidentate 1,3,4-thia­diazole ligand substituted by two 2-pyridyl rings (denoted
<italic>L</italic>
) has been found to produce the new monomeric title complex, [Co(C
<sub>12</sub>
H
<sub>8</sub>
N
<sub>4</sub>
S)
<sub>2</sub>
(H
<sub>2</sub>
O)
<sub>2</sub>
](BF
<sub>4</sub>
)
<sub>2</sub>
. The thia­diazole and pyridyl rings surrounding the Co atom are almost coplanar [dihedral angle = 4.35 (7)°]. The mean plane defined by these heterocyclic moieties makes a dihedral angle of 18.72 (6)° with the non-coordinated pyridyl ring. The Co
<sup>2+</sup>
cation, located at a crystallographic center of symmetry, is bonded to two ligands and two water mol­ecules in a
<italic>trans</italic>
configuration in an octa­hedral environment. The tetra­fluorido­­borate ions can be regarded as free anions in the crystal lattice. Nevertheless, they are involved in an infinite two-dimensional network along the [010] and [101] directions of O—H⋯F hydrogen bonds.</p>
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