Potentiometric and AM1d studies of silicon and boron podands-silver (I) complexes

The two new types of podands: silicon ones with the CC bonds and boron podands, have been synthesised and the formation of their complexes with silver (I) cations has been studied by potentiometric and AM1d semiempirical methods. The stability constants for the complexes including different numbers of silver (I) cations are determined. It has been shown that the silver (I) cation is preferentially coordinated by the π electrons of the CC bonds of the vinyl or allyl groups. It has been also shown that the number of Ag+ cations complexed by the boron podands depends strongly on the number of oxygen atoms in the oxaalkyl chains. The energetically favourable structures of the selected complexes are visualised by the AM1d semiempirical method.