title: An irreversible phase transition in 1-n-butylindeno[2,1-c]pyran-3,9-dione.
abstract: At ambient temperature, the title compound, C(16)H(14)O(3), is triclinic, with the n-butyl side chain disordered in an out-of-plane orientation. On cooling below 240 K, it converts into a different triclinic phase with an ordered planar conformation and denser packing, which is retained on warming to room temperature. The transition (occasionally) proceeds from single crystal to single crystal.
authors.affiliation: Department of Chemistry, University of Durham, England, UK. a.s.batsanov@durham.ac.uk
authors.forename: Andrei S
authors.initials: AS
authors.lastname: Batsanov
authors.forename: Judith A K
authors.initials: JA
authors.lastname: Howard
authors.forename: Na
authors.initials: N
authors.lastname: Wu
authors.forename: Zhen
authors.initials: Z
authors.lastname: Yang
authors.forename: Todd B
authors.initials: TB
authors.lastname: Marder