title: Crystal structure of (n-but-yl)[2-(2,6-di-meth-oxy-phen-yl)-6-methyl-phen-yl](2-meth-oxy-phen-yl)phospho-nium chloride monohydrate.
abstract: The title hydrated salt, C26H32O3P(+)·Cl(-)·H2O, contains four different substit-uents (H, alkyl, aryl, and biar-yl) on the P atom. The P-H hydrogen atom of the phospho-nium ion was located in a difference Fourier map and refined without imposing additional restraints. In the crystal, the Cl(-) ions and water mol-ecules are linked by pairs of Owater-H⋯Cl(-) hydrogen bonds and further linked to the phospho-nium cation by P-H(+)⋯Cl(-) and CAr/OMe-H⋯Owater hydrogen bonds to form an infinite one-dimensional chain along the [010] direction.
authors.affiliation: Department of Chemistry, the University of Chicago, 5735 South Ellis ave, Chicago, IL 60637, USA.
authors.forename: Ge
authors.initials: G
authors.lastname: Feng
authors.affiliation: Department of Chemistry, the University of Chicago, 5735 South Ellis ave, Chicago, IL 60637, USA.
authors.forename: Alexander S
authors.initials: AS
authors.lastname: Filatov
authors.affiliation: Department of Chemistry, the University of Chicago, 5735 South Ellis ave, Chicago, IL 60637, USA.
authors.forename: Richard F
authors.initials: RF
authors.lastname: Jordan
keywords: crystal structure; hydrogen bonding; phospho­nium salt