title: Epitaxial Retrieval of a Disappearing Polymorph.
abstract: Recrystallization of [PdCl2([9]aneS2O)] ([9]aneS2O = 1-oxa-4,7-dithiacyclononane),1, and [PtCl2([9]aneS2O)],2, by diffusion of Et2O vapor into solutions of the complexes in MeNO2yielded three phases of1and two phases of2. The known phase of1, herein designated α-1, was obtained under ambient conditions. A second phase, designated β-1, was initially also obtained by this method; however, following the advent of a third phase, γ-1, all subsequent efforts over a period of a year to crystallize β-1yielded either γ-1, obtained by carrying out the recrystallization at elevated temperature, or α-1, commonly found throughout the study. This persistent absence of a phase which could initially be crystallized with ease led us to the conclusion that β-1was an example of a "disappearing polymorph". The first phase obtained of2, designated α-2, was obtained by recrystallization under ambient conditions and is isomorphous and isostructural with α-1. The second phase β-2was obtained by slight elevation of the recrystallization temperature and was found to be isomorphous and isostructural with β-1. Subsequently, β-2was used to seed the growth of the disappearing polymorph β-1. No third phase of2(γ-2) has been isolated thus far.
authors.affiliation: School of Chemistry, University of Nottingham , University Park, Nottingham, Nottinghamshire, United Kingdom NG7 2RD.
authors.forename: Jeremiah P
authors.initials: JP
authors.lastname: Tidey
authors.affiliation: School of Chemistry, University of Nottingham , University Park, Nottingham, Nottinghamshire, United Kingdom NG7 2RD.
authors.forename: Alice E
authors.initials: AE
authors.lastname: O'Connor
authors.affiliation: School of Chemistry, University of Nottingham , University Park, Nottingham, Nottinghamshire, United Kingdom NG7 2RD.
authors.forename: Alexander
authors.initials: A
authors.lastname: Markevich
authors.affiliation: School of Chemistry, University of Nottingham , University Park, Nottingham, Nottinghamshire, United Kingdom NG7 2RD.
authors.forename: Elena
authors.initials: E
authors.lastname: Bichoutskaia
authors.affiliation: School of Chemistry, University of Nottingham , University Park, Nottingham, Nottinghamshire, United Kingdom NG7 2RD.
authors.forename: Joseph J P
authors.initials: JJ
authors.lastname: Cavan
authors.affiliation: Discipline of Chemistry, School of Environmental and Life Sciences, The University of Newcastle , Callaghan, NSW 2308, Australia.
authors.forename: Geoffrey A
authors.initials: GA
authors.lastname: Lawrance
authors.affiliation: School of Chemistry, University of Nottingham , University Park, Nottingham, Nottinghamshire, United Kingdom NG7 2RD.
authors.forename: Henry L S
authors.initials: HL
authors.lastname: Wong
authors.affiliation: School of Chemistry, University of Nottingham , University Park, Nottingham, Nottinghamshire, United Kingdom NG7 2RD.
authors.forename: Jonathan
authors.initials: J
authors.lastname: McMaster
authors.affiliation: School of Chemistry, University of Nottingham , University Park, Nottingham, Nottinghamshire, United Kingdom NG7 2RD.
authors.forename: Martin
authors.initials: M
authors.lastname: Schröder
authors.affiliation: School of Chemistry, University of Nottingham , University Park, Nottingham, Nottinghamshire, United Kingdom NG7 2RD.
authors.forename: Alexander J
authors.initials: AJ
authors.lastname: Blake