Crystal and molecular structure of potassium 18-crown-6-[2,6-bis(dimethylaminomethyl)phenyl]tin(IV) tetrafluoride

Abstract

The crystal structure of the title compound shows the [K(18-crown-6)]+ cation and [{2,6-(Me2NCH2)2C6H3}SnF4]– anion, which are held together through two potassium–fluorine and one potassium–tin electrostatic interaction. The tin atom is hexacoordinated by one carbon and four fluorine atoms, and an intramolecular N→Sn interaction. It has a distorted octahedral configuration. Electrostatic interactions between two fluorine atoms and hydrogen atoms from two different cation–anion pairs generate a double-chain polymeric supramolecular structure, containing both isomers.

Keywords

• crown ether
• hydrogen bond
• hypercoordination
• organotin fluoride