Structural chemistry of naphthalenedisulfonate salts

Crystal structure of hexaaquacobalt(II) bis(3-carboxy-4-hydroxybenzenesulfonate) dihydrate, [Co(H2O)6][C7H5O3SO3]2 · 2H2O

“…The Co 11 ionic radius of 0.72 A is slightly shorter than that of Cu 11 , so we notice a light octahedral distortion with regard to the isostructural copper compound [1]. Due to the Jahn-Teller effect, the Col-03 distance of 2.062(2) Ä is much shorter than those forCol-Ol and Col-02(2.101 (1) The conformation of the sulfonate anion is similar to that of the 2-aminotoluene-4-sulfonate ion in [4], the only difference is due to the substitution of the phenyl ring. …”

Bis(triethylaminium) hexaaquazinc(II) bis(naphthalene-1,6-disulfonate)

“…Owing to the weak coordination strength of sulfonate toward transition metal ions, most of the reported transition metal sulfonates prepared in aqueous solution were formed by aggregation of aquametal complex cations and sulfonate anions (Kosnic et al, 1992;Shubnell et al, 1994;Gunderman et al, 1997). The same situation appears in (I), with the triclinic unit cell containing one hexahydrated zinc(II) cation, two triethylaminium cations and two naphthalene-1,6-disulfonate (1,6-nds) dianions (Fig.…”

“…Organic sulfoacids and their derivatives are widely used in the synthesis of surface active agents, dyes, medicines and so on. So far, a few crystallographic studies on naphthalenesulfonate complexes have been reported (Gunderman et al, 1997;Alvarez et al, 1998;Cai, Chen, Feng et al, 2001;Chen et al, 2002;Chandrasekhar et al, 2003;Chen et al, 2004;Sharma et al, 2005). Recently, the title complex, (I), was synthesized in our laboratory and its crystal structure is discussed here.…”

Hexaaquazinc(II) 3-ammonionaphthalene-1,5-disulfonate tetrahydrate

“…As part of our ongoing studies of salts of 3-aminonaphthalene-1,5-sulfonate with divalent transition metals, we now report the structure of the title compound, (I), which is isostructural with its nickel(II) (Gunderman, Kabell et al, 1997) …”

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Key indicators: single-crystal X-ray study; T = 273 K; mean (C-C) = 0.002 Å; Hatom completeness 89%; disorder in solvent or counterion; R factor = 0.038; wR factor = 0.107; data-to-parameter ratio = 22.2.metal-organic compounds m2262 # 2007 International Union of Crystallography

CommentAs part of our ongoing studies of salts of 3-aminonaphthalene-1,5-sulfonate with divalent transition metals, we now report the structure of the title compound, (I), which is isostructural with its nickel(II) (Gunderman, Kabell et al, 1997)

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