Complexes of Alkaline Earth Metal Ions with the Cyclodimethylsiloxane Ligands D₇, D₈ and D₉ (D=Me₂SiO)

Abstract We present complexes of alkaline earth metal ions with the large cyclodimethylsiloxane D 7 , D 8 and D 9 . The compounds prepared are [Mg(D 7 )(H 2 O) 2 ][GaI 4 ] 2 ( 1 ⋅2H 2 O), [Ca(D 8 )][GaI 4 ] 2 ( 2 ), [Sr(D 8 )][GaI 4 ] 2 ( 3 ), [Ba(D 8 )][GaI 4 ] 2 ( 4 ), [Ca(D 9 )][GaI 4 ] 2 ( 5 ), [Sr(D 9 )][GaI 4 ] 2 ( 6 ) and [Ba(D 9 )][GaI 4 ] 2 ( 7 ). Single‐crystal X‐ray diffraction and multinuclear NMR spectroscopy were used to analyze the prepared compounds and coordination modes in the solid state and in solution.