Metal-organic coordination network (MOCN) materials are an active area of research in the fields of inorganic and materials chemistry.  A key feature of MOCN materials is that considerable structural predictive ability exists over traditional solid-state inorganic compounds in their design.  The rational preparation of these materials from rigid organic spacers and metals of known coordination tendencies is often referred to as crystal engineering.  The vast majority of networks are formed from later transition metals and rigid carboxylate or pyridine based organic spacer ligands.  We have been studying a unique class of early transition metal covalent metal-aryloxide coordination polymers synthesized from bisphenolic spacer precursors and titanium(IV) alkoxides.  It has been observed that different products are obtained when different derivatives of Bisphenol-A are employed as a spacer ligand precursor.  For example, bis(4-hydroxyphenyl)sulfide yields a one-dimensional chain, whereas bis(4-hydroxyphenyl)methane gives a two-dimensional sheet under the same conditions.  In order to probe how the structural features of the dihydroxy spacer ligand precursors may affect MOCN structure, the X-ray structures of Bisphenol-A (bis(4-hydroxyphyl)-2-propane) and three of its derivatives have been determined.  The results show that the C_aryl-E-C_aryl angle (where E = S, 104.21(4)º; C(CH₃)₂, 108.9(7)º; CH₂, 114.85(7)º; O, 118.8(1)º) may be integral in controlling network dimensionality and topology in metal-aryloxide networks obtained from derivatives of Bisphenol-A.