Structures of transition and alkaline earth metal salts of 5-aminonaphthalene-2-sulfonate and 6-aminonaphthalene-1, 3-disulfonate: Some unusual coordination behaviors
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Salts of 5-aminonaphthalene-2-sulfonate with divalent Mg, Mn, Co, and Ni cations have been crystallized and their structures determined by single crystal X-ray methods. The Mg, Mn, and Co salts are isostructural. Crystal data for hexaaquamagnesium(II) 5-aminonaphthalene-2-sulfonate hexahydrate, [Mg(H 2O) 6](H 2NC 10H 6SO 3) 26H 2O: monoclinic, P2 1/c, Z=2, a=14.1329(18), b=8.5789(11), c=12.4880(17), =93.374(3), V=1511.5(3) 3; hexaaquamanganese(II) 5-aminonaphthalene-2-sulfonate hexahydrate, [Mn(H 2O) 6](H 2NC 10H 6SO 3) 26H 2O: monoclinic, P2 1/c, Z=2, a=14.249(3), b=8.5940(17), c=12.505(3), =93.30(3), V=1528.8(6) 3; hexaaquacobalt(II) 5-aminonaphthalene-2-sulfonate hexahydrate, [Co(H 2O) 6](H 2NC 10H 6SO 3) 26H 2O: monoclinic, P2 1/c, Z=2, a=14.1406(18), b=8.5674(11), c=12.4960(16), =93.297(2), V=1511.4(3) 3. The structures are composed of alternating layers of octahedral metal-aqua complexes and sulfonate anions linked by hydrogen bonds. The three water molecules of crystallization are associated with the hexaaquametal cations and sulfonate O atoms. The repeat unit along the a-axis is a single layer. The Ni salt [crystal data for tetraaquabis(5-aminonaphthalene-2-sulfonato-N)nickel(II) dihydrate, [Ni(H 2O) 4(H 2NC 10H 6SO 3) 2]2H 2O: triclinic, 1, Z=1, a=6.8524(10), b=8.3094(12), c=11.4832(17), =69.003(2), =76.570(3), =83.952(2), V=593.56(15) 3] has a very different structure with direct coordination of the amine N atom to Ni, a modified stacking pattern, and fewer free water molecules. Ag and Ni salts of an amine-substituted naphthalenedisulfonate have also been characterized. Crystal data for diaqua(6-ammonionaphthalene-1,3-disulfonato-O)silver(I) hydrate, [Ag(H 2O) 2(H 3NC 10H 5(SO 3) 2)]0.42H 2O: monoclinic, P2 1/c, Z=2, a=9.099(3), b=21.406(6), c=7.629(2), =110.178(4), V=1394.9(7) 3; tetraaquabis (6-ammonionaphthalene-1,3-disulfonato-O)nickel(II)tetrahydrate, [Ni(H 2O) 4(H 2NC 10H 5 (SO 3) 2) 2]4H 2O: triclinic, 1, Z=1, a=6.7971(17), b=10.661(3), c=11.165(3), =68.308(4), =88.292(5), =84.896(5), V=748.8(3) 3. The silver salt contains six coordinate metal centers each of which bonds to four sulfonate O atoms from three different anions and two water molecules. The nickel salt contains octahedral cations with four water molecules and two trans sulfonate O atoms. Both structures are layered, but differently from each other and from those of the monofunctional naphthalenesulfonate salts. 2006 Springer Science+Business Media, Inc.
