title: A new polymorph of cis-transoid-cis-dicyclohexano-18-crown-6.
abstract: A new orthorhombic polymorphic modification of the title compound (alternative name: cis-transoid-cis-2,5,8,15,18,21-hexaoxatricyclo[20.4.0.0(9,14)]hexacosane), C(20)H(36)O(6), has been found and is compared with the previously known monoclinic modification. In the structures of the two polymorphs, the crown-ether molecules are centrosymmetric and reveal essentially the same molecular shape but different packing motifs.
authors.affiliation: Institute of Applied Physics, Academy of Sciences of Moldova, Academy str 5, MD 2028 Chisinau, Moldova. kravtsov.xray@phys.asm.md
authors.forename: Victor Ch
authors.initials: VCh
authors.lastname: Kravtsov
authors.forename: Marina S
authors.initials: MS
authors.lastname: Fonari
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Zaworotko
authors.forename: Janusz
authors.initials: J
authors.lastname: Lipkowski