Bis[μ-bis(2,6-diisopropylphenyl) phosphato-κ<sup>2</sup> <i>O</i>:<i>O</i>′]bis[(2,2′-bipyridine-κ<sup>2</sup> <i>N</i>,<i>N</i>′)lithium] toluene disolvate and its catalytic activity in ring-opening polymerization of ∊-caprolactone and <scp>L</scp>-dilactide
Acta crystallographica. Section E, Crystallographic communications