Some alkylphosphoric acid esters for use in coated-wire calcium-selective electrodes : Part 3. Structural Characteristics of Calcium Di(octylphenyl)phosphate

The materials previously believed to be calcium salts of 4-(n-octyl)phenyl- and bix-4-(n-octyl)-phenylphosphoric acids are shown to be the calcium salts of 4-(1′,1′,3′,3′-tetramethylbutyl)-phenyl- and bis-[4-(1′,1′,3′,3′-tetramethylbutyl)phenyl]phosphoric acids. The latter compound is shown not to contain chelating phosphate groups in the solid state.