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Syntheses and crystal structures of two magnesium–tetrazole compounds in salt and polymeric forms
Author(s) -
Bensegueni Mohamed Abdellatif,
Cherouana Aouatef,
Dahaoui Slimane
Publication year - 2015
Publication title -
acta crystallographica section c
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 17
ISSN - 2053-2296
DOI - 10.1107/s2053229615002727
Subject(s) - tetrazole , hydrogen bond , magnesium , dimer , crystallography , chemistry , crystal structure , polymer , ribbon , salt (chemistry) , molecule , polymer chemistry , stereochemistry , materials science , organic chemistry , composite material
Two alkaline earth–tetrazole compounds, namely catena ‐poly[[[triaquamagnesium(II)]‐μ‐5,5′‐(azanediyl)ditetrazolato‐κ 3 N 1 , N 1′ : N 5 ] hemi{bis[μ‐5,5′‐(azanediyl)ditetrazolato‐κ 3 N 1 , N 1′ : N 2 ]bis[triaquamagnesium(II)]} monohydrate], {[Mg(C 2 HN 9 )(H 2 O) 3 ][Mg 2 (C 2 HN 9 ) 2 (H 2 O) 6 ] 0.5 ·H 2 O} n , (I), and bis[5‐(pyrazin‐2‐yl)tetrazolate] hexaaquamagnesium(II), (C 5 H 3 N 6 )[Mg(H 2 O) 6 ], (II), have been prepared under hydrothermal conditions. Compound (I) is a mixed dimer–polymer based on magnesium ion centres and can be regarded as the first example of a magnesium–tetrazolate polymer in the crystalline form. The structure shows a complex three‐dimensional hydrogen‐bonded network that involves magnesium–tetrazolate dimers, solvent water molecules and one‐dimensional magnesium–tetrazolate polymeric chains. The intrinsic cohesion in the polymer chains is ensured by N—H...N hydrogen bonds, which form R 2 2 (7) rings, thus reinforcing the propagation of the polymer chain along the a axis. The crystal structure of magnesium tetrazole salt (II) reveals a mixed ribbon of hydrogen‐bonded rings, of types R 2 2 (7), R 2 2 (9) and R 2 4 (10), running along the c axis, which are linked by R 2 4 (16) rings, generating a 4,8‐c flu net.