1,4-Dimethylpiperazine-1,4-diium dibromide dihydrate
نویسندگان
چکیده
منابع مشابه
1,4-Dimethylpiperazine-1,4-diium dibromide dihydrate
In the title hydrated mol-ecular salt, C(6)H(16)N(2) (2+)·2Br(-)·2H(2)O, the complete 1,4-dimethyl-piperazine-1,4-diium dication is generated by crystallographic inversion symmetry and both exocyclic C-N bonds are in equatorial orientations. In the crystal, the components are linked by N-H⋯O and O-H⋯Br hydrogen bonds, generating chains propagating in [110].
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The asymmetric unit of the title complex, [Ni(C(16)H(32)N(4))]Br(2)·2H(2)O, contains two [Ni(C(16)H(32)N(4))](2+) cations, four Br(-) anions and four uncoordinated H(2)O mol-ecules. The Ni atoms are in a slightly distorted square-planar coordination by the four macrocyclic N atoms, which are almost coplanar [N-N-N-N torsion angles of 2.97 (6) and 3.12 (7)°]. In the crystal, a network of N-H⋯Br,...
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In the title compound, C(20)H(18)N(2) (2+)·2Br(-)·2H(2)O, the complete dication is generated by a crystallographic centre of symmetry. In the crystal, O-H⋯Br, C-H⋯Br and C-H⋯O hydrogen bonds and π-π stacking [shortest centroid-centroid separation = 3.657 (2) Å] help to establish the packing.
متن کاملRedetermination of 2,2′-bipyridine-1,1′-diium dibromide
In the title mol-ecular salt, C(10)H(10)N(2) (2+)·2Br(-), the dihedral angle between the aromatic rings is 20.83 (14)° and the N-H groups have a transoid conformaton [N-C-C-N = 158.5 (3)°]. In the crystal, the cations are linked to the anions by two N-H⋯Br and five C-H⋯Br hydrogen bonds, generating corrugated sheets incorporating R(2) (1)(7), R(4) (2)(10), R(4) (2)(11) and two different R(4) (2...
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In the title compound, C(10)H(22)N(2) (2+)·2Br(-), a precursor in the synthesis of organocatalysts, the bipiperidinium ion is located on a twofold rotation axis which passes through the mid-point of the central C-C bond. The piperidinium ring adopts a chair conformation. In the crystal, the cations are linked together by Br(-) ions through N-H⋯Br hydrogen bonds, forming layers parallel to the a...
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ژورنال
عنوان ژورنال: Acta Crystallographica Section E Structure Reports Online
سال: 2012
ISSN: 1600-5368
DOI: 10.1107/s1600536812020272