Table 2. Angles (°) of the C–COO(H) plane to the mean plane of the carbon skeleton of the β-oxynaphthoic acid moiety.

Refcode	Salt	Solvate / Hydrate	|Angle|
BIHNUCa	Ca[C17H10N2O6ClS]2	2 DMF	0.09
GUNZAT	Na[C18H12ClN2O6S]	2 H2O	2.43
FAWQUR	Ca[C18H12N2O6S]		22.5
KAQSAW	Ca[C17H8Cl2N2O6S]	2 H2O	23.3
FAWQIF	Ca[C18H14N2O7S]	2 H2O	26.3
GUNZEX	Na[C18H12ClN2O6S]	1 H2O	28.6
BOGDUZa	Dy[C13H7N5O3][BONA]b	2 DMF, 2 H2O	36.6
FAWQOL	Ca[C18H12N2O6S]	1 H2O	37.7
BOGFIPa	Eu[C13H7N5O3][BONA]b	DMF, 4 H2O	39.0
BOGFAHa	Tb[C13H7N5O3][BONA]b	DMF, 4 H2O	39.0
BOGFELa	Sm[C13H7N5O3][BONA]b	DMF, 4 H2O	39.1

Notes: (a) This is not a pigment with a Colour Index number; (b) BONA = β-oxynaphthoic acid.