A new polymorph of cis-transoid-cis-dicyclohexano-18-crown-6.
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.
Kravtsov
Victor Ch
VCh
Institute of Applied Physics, Academy of Sciences of Moldova, Academy str 5, MD 2028 Chisinau, Moldova. kravtsov.xray@phys.asm.md
Fonari
Marina S
MS
Zaworotko
Michael J
MJ
Lipkowski
Janusz
J