Crystal structure of {(R)-N 2-[(benzo[h]quinolin-2-yl)methyl]-N 2′-[(benzo[h]quinolin-2-yl)methylidene]-1,1′-binaphthyl-2,2′-diamine-κ4 N,N′,N′′,N′′′}(trifluoromethanesulfonato-κO)zinc(II)} trifluoromethanesulfonate dichloromethane 1.5-solvate