The first crystal and molecular structures of hydrated bis(n-perfluoroalkyl)phosphinic acids [H3O]+[(Rf)2PO2]− (Rf = C6F13, C7F15 or C8F17)
Abstract
The first crystal and molecular structures of hydrated bis(n-perfluoroalkyl)phosphinic acids, [H3O]+ [(Rf)2PO2]− (Rf = C6F13, C7F15 or C8F17), have been determined by ) and [H3O]+[(C8F17)2PO2]−·Me2CO 3 crystallizes in the orthorhombic space group Pca2(1). In each case the phosphorus atom is tetrahedral and the perfluoroalkyl chains have a zigzag planar conformation. The structures consist of infinite sheets of the perfluoroalkyl phosphinate held together by hydrogen bonding with the counter ion H3O+. In compound 3 the additional