Bis(2-amino-3,5-dibromo-4,6-dimethylpyridinium) hexabromidostannate(IV)

Abstract

In the title compound, (C(7)H(9)Br(2)N(2))(2)[SnBr(6)], the cations and centrosymmetric anions are stacked in alternating layers that show no significant intermolecular interactions within each stack. Extensive cation...[SnBr(6)](2-) interactions are found, represented by short Br...Br interactions, along with different Br...HN (pyridine and amine) and weaker Br...HCH(2) hydrogen-bonding motifs.

Three-dimensional framework structures: isomorphous bis(2,6-diamino-3,5-dibromopyridinium) tetrabromidometallate(II) salts with CdIIand MnII

“…These complexes were prepared from the reaction of 2,6-diaminopyridine with the corresponding metal(II) salt in the presence of HBr and Br 2 . The introduction of amino groups at the 2-and 6-positions facilitates the electrophilic aromatic substitution of Br atoms at the 3-and 5-positions and increases the nucleophilicity at the ring N atom (Al-Far & Ali, 2007b). Therefore, protonation of the resulting 2,6-diamino-3,5-dibromopyridine takes place on the pyridine N atom rather than on the amino N atoms.…”

Transition metal complexes of 2-amino-3,5-dihalopyridines: Syntheses, structures and magnetic properties of (3,5-diCAPH)2CuX4 and (3,5-diBAPH)2CuX4

“…N( 11)-H( 11) ◊ ◊ ◊ Cl(2) 0.74(6) 2.52 (6) 3.223(4) 160( 6) N( 12)-H(12B) ◊ ◊ ◊ Cl(3)#1 0.76 (7) 2.59 (7) 3.304( 6) 158( 7) N( 12)-H(12A) ◊ ◊ ◊ Cl (2) 0.75 (7) 2.64 (7) 3.320( 6) 150( 7) N( 21)-H(21A) ◊ ◊ ◊ Cl(4)#1 0.74(6) 2.57 (7) 3.289(5) 165( 6) N( 22)-H(22A) ◊ ◊ ◊ Cl(1) 0.93 (7) 2.31 (7) 3.234( 6) 169( 6) N( 22)-H(22B) ◊ ◊ ◊ Cl(4)#1 0.60 (7) 2.77 (8) 3.340( 5) 159( 10) 11)-H( 11) ◊ ◊ ◊ Br(3) 0.96 (7) 2.53 (7) 3.406( 7) 151( 6) N( 21)-H(21) ◊ ◊ ◊ Br(2)#2 0.83 (7) 2.59 (7) 3.353( 6) 154( 7)…”

Three isomorphous 2,6-dibromopyridinium tetrabromidometallates: (C5H4Br2N)2[MBr4]·2H2O (M= Cu, Cd and Hg)

“…The reaction of two equivalents of 2,6-dibromopyridine with one equivalent of the corresponding M II salt in the presence of excess aqueous HBr gave compounds (I), (II) and (III) in 90, 84 and 82% yield, respectively. The introduction of Br atoms at the 2-and 6positions increases the basicity at the ring N atom (Al-Far & Ali, 2007a). Therefore, the resulting protonated 2,6-dibromopyridine was expected to create many important centres of interaction with the bromidometal anions, e.g.…”