Lithium chloride is soluble in pyridine while other lithium halides are not. Why?

I know that lithium chloride is deliquescent like magnesium chloride. Lithium halides are covalent and thus are soluble in organic solvents. Then, why is it that only lithium chloride is soluble in pyridine?

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    $\begingroup$ They are more ionic than covalent, and soluble in polar solvents. $\endgroup$ – Mithoron Feb 9 '16 at 20:34
  • $\begingroup$ I was told that, since the solvation energy of LiCl is more, so its soluble. But this doesn't clear my doubt. $\endgroup$ – shaistha Feb 10 '16 at 14:37
  • $\begingroup$ @Mithoron, i know that alkali metal halides are mostly ionic solids, but, Li halides are more covalent because 1)high polarisation capabilities of Li ion. 2)small size 3) high tendency to distort electron cloud around negative halide ion. $\endgroup$ – shaistha Feb 10 '16 at 14:40

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